If an RCA connector on your amp has shorted, you can repair it yourself at home. You may need to buy some of the necessary tools, but once you have them, you'll have the means to repair similar breakages in the future without having to go to the repair shop every time. You won't need any electronics experience, but be careful when using the soldering iron since it becomes very hot during use.
A guitar switcher enables you to switch between which output your guitar is feeding out of. Make a guitar audio switcher with help from a graduate of Full Sail University in Recording Arts in this free video clip.
Mention "damping factor" among audiophiles and you're likely to start a lively debate. While there's a specific technical definition, it's basically one of many ways to evaluate an amplifier for high-quality performance, indicating how well it should control loudspeakers and produce accurate sound. A very low number may be cause for concern about sound quality, but very high numbers have their problems also including possible design issues in the amplifier.
Whether you're looking at a standalone power amp, an audio/video receiver or even a car stereo amplifier, the manufacturer will almost always prominently feature a watt per channel rating and, in fine print, say that the rating is into an 8 ohm load. Put simply, the watt rating tells you how much power the amplifier has while the ohm rating tells you the conditions under which it delivers the power.
Amplifiers are usually rated by how many watts per channel they can output. This wattage is a measure of power output, while the impedance in speakers is measured using ohms. For example, with all things being equal, a 200-watts-per-channel amplifier has twice the power of a 100-watts-per-channel amplifier, and should be able to play louder without distortion. However, just because it's bigger doesn't mean that it'll work better for your needs.
Pioneer offers two models in its Elite series A/V receiver line that reach the 140-watt per channel power threshold. The SC-68 and SC-67 are Class D 9-channel amplifiers that can provide immersive surround sound for your home theater, as well as handle detailed audio playback for all types of digital music formats.
Consumer electronics equipment, such as amplifiers and radios, use mainly two types of audio connectors: RCA and 3.5mm mini phone plug. Amplifiers have a set of RCA connectors on the back; a typical radio has a mini plug output. They are distinctly different and mutually incompatible, so you cannot insert a mini plug into an RCA jack or vice versa. You can, however, obtain an adapter cable from nearly any consumer electronics outlet. Using such a cable, hooking an amp to a radio is a cinch.
The Sony TA-E1000ESD digital processing control amplifier -- sometimes called just the Sony 1000ESD -- is a preamplifier and processor for a home-theater system. Dating back to the late 1980's, this component represented the state of the art for its time. It combines a full set of analog audio and video inputs with the ability not only to route digital audio signals, but also to digitally modify sound. This allowed it to both support Dolby Pro-Logic surround sound in movies and to simulate various listening environments.
Class C amplifiers are analog components commonly used in high-distortion/high-output devices such as megaphones and broadcast transmission amplifiers. For that reason, Class C amplifier designs are primarily focused on high efficiency. Selecting the proper parts and integrating those parts correctly results in an efficient design that is effective and durable.
A low noise amplifier raises an input voltage to a higher output with low noise. The amp's gain represents the level to which voltage is multiplied. A basic low noise amplifier consists of these components: four outputs, four inverting inputs, four non-inverting inputs, a positive voltage input and a negative voltage input. To make power more uniform, you with also need pairs of capacitors, resistors and 9-volt batteries that share a common ground.
The amplifiers that transport you to another place and time through reproduction of music and movie soundtracks contain numerous circuits, which prove critical in handling the electrical impulses you later perceive as sound. From the input to the output stage, each circuit must handle the delicate signals with a minimum of loss and error to avoid distortion and poor sound.
Receivers, processors and amplifiers that perform video upscaling are common. Able to take a legacy source such as an older DVD player, VCR or other non-high definition source and convert it to near-HD quality, these receivers often perform better scaling than the television. However, there are multiple considerations and alternative options to consider before you use upscaling as an influencing feature in your next receiver/amplifier purchase.
Digital delay is an electronic effect used by vocalists and musicians to create a repeating echo with an expanded sound. Digital delay can be accomplished by a variety of devices that range from small inexpensive boxes used with electric instruments to expensive gear used in recording studios. Digital delay can be adjusted based on attack and decay times. Digital delay is useful as a repeating sound effect that broadens sound, as well as a tool for tempo and reducing echo from multiple speakers.
The science of electroacoustics began with the invention of the telephone in the mid-1800s and progressed through radio, audio amplifiers and other developments in the early 1900s. Electroacoustics applies electrical and electronic principles to the creation, transmission and reproduction of sound. Today, virtually all live and recorded musical performances are done using electronic equipment.
Amplifier design encompasses many topologies. Some of these are known as Class A, B A/B and D. Class B designs attempt to improve conventional Class A topology by increasing efficiency. All amplifiers convert voltage to wattage, with more than a third of it wasted as heat. Class B designs remain slightly more efficient than its Class A cousin by using an innovative approach.
A tube buffer amplifier is an electronic device that is utilized to help amplify the sound coming from any other electronic music device you may own -- such as a record player, CD player or MP3 player. A Yaqin tube buffer adds a warmth and fullness to any music player without adding any noise or distortion to the sonic landscape.
Amplifying audio for playback and listening can take many forms, from a home or car stereo to a major concert PA system. While the systems and components themselves may vary greatly between applications, the audio signal path, and therefore the installation wiring, remains generally the same in each case.
The Hafler DH200 amplifier includes a two-hundred watt sound output, anti-distortion technology and a built-in electricity meter to measure power spikes. A consistent hum in an audio amplifier usually stems from faulty electronics, either within the amplifier itself or from a source connected to it. Depending upon the extent of electronic damage, the amplifier may have to be sent to Hafler for repairs. Many times, however, the hum can eliminated with troubleshooting.
Digital audio components aim to create a perfect rendition of the music files you regularly enjoy. Digital pots, or potentiometers are physical descriptions of volume and tone controls, and allow you to adjust the sound to your taste and preferred output level. Digital audio converters or DACs convert digital audio files to analog, where they are then output over the amplifier/speaker connection. Both are essential and non-redundant, required to ensure the quality output you expect.
Home theater subwoofers and many audio amplifiers use a sensitive auto-on detection circuit inline with their RCA input jacks. Designed to save energy by keeping the amplifier in standby with no signal, these circuits also keep amplifier heat to a minimum when the device is not in use. These only operate when the RCA sends a signal from the preamp or receiver, keeping the amplifier on when you want it without having to manually turn the unit off and on.
Audio power amplifiers are designed to safely drive standard speaker system ohm loads of 4 to 16, but some -- including the XTI series of Crown amps -- can be run at 2 ohms. The sole reason to run a Crown or other brand of low ohm-capable amps at 2 ohms is to tap the amplifier's maximum power, but users must be aware of possible consequences.
Preamplifiers and low noise amplifiers (LNAs) both compensate for the limits of a conventional electronic amplifier. Amplifiers can only work with signals above a certain noise level, but LNAs and preamps both pick up and enhance faint signals to "line level," the point at which an amplifier can work with it.
From your alarm clock, to your car radio, to the public address system that lets you hear your favorite band onstage -- a contemporary lifestyle sees you surrounded by electronic amplifiers. With all their different shapes, sizes and purposes, their goal is essentially the same: to take an electric signal representing sound, and magnify it so you can use and enjoy it.
Audio technology terms like low-level and high-level outputs can be confusing and not always obvious. High level outputs refer to higher-current amplified signals, such as that traveling over speaker wire. More common outputs used to connect receivers and preamplifiers to amplifiers are low-level outputs, found as RCA or XLR jacks.
The purpose of a standby switch on a stereo amplifier is to maintain a level of internal tube voltage during periods of non-use. Equipped on both mono and stereo amplifiers with vacuum tube circuitry, standby switches allow shorter warm-up cycles and can help extend tube life.
A bilateral amplifier is a type of amplifier, which is an electronic device used to increase signal amplitude. While most amplifiers are only capable of transmitting signals, bilateral amplifiers are able to receive them as well. Traditional amplifiers are most commonly used for sound reproduction, whereas bilateral amplifiers are primarily used in transceivers.
Patchbays are used in all professional and many larger home recording studios to organize input and output cables connected to audio components. It is safe to run an amp input and auxiliary output to a patchbay, but it's never safe to run the amp's speaker outputs because of the higher voltage levels required to drive speakers.
Electronic amplifier designs come in several distinct classes, such as Class A, AB, B and C. Class A has the highest fidelity but the lowest efficiency, Class B's efficiency is better but it has less fidelity; generally, each class has more efficiency and lower fidelity than the one before. Class AB circuits have a practical combination of good fidelity and efficiency at a reasonable cost.
You can use headphones to listen to the signal running through a Peavey amplifier. Peavey amps use a quarter-inch connector, which needs to be converted to the 3.5 mm headphone connection. When wiring headphones into your Peavey amplifier, you must use the preamp jack on the amp so you don't blow out your headphones, and possibly your ears. The preamp jack is designed to give you a line-level signal that can be equalized or recorded later. You can also use it to wire in a set of headphones.
A Class D amplifier is a high-efficiency electronic circuit designed to boost the power of incoming signals. Its operating principle is different from other amplifier classes, abruptly switching its output transistors either completely on or off. Until recently, this behavior made Class D amplifiers too noisy for audio and music, but improvements to the circuit have made it a common part of modern home theater systems.
Impedance is a mysterious parameter when considering amplifiers and speakers and how they interconnect. While impedance is crucial to the sound and performance of any audio system, the impedance value of an amp on its own has little meaning and no bearing. The important factor is how closely the impedance rating of the amplifier matches the impedance load of the speaker systems used with it.
Bookshelf speakers are speaker cabinets and speaker systems used in home audio. The woofer is a part of the speaker that makes low-frequency sound. Both age and excessive volume can contribute to damage of the woofer, which can develop small tears. Rather than replace the entire speaker, the woofer cone can usually be repaired or swapped out. This process only takes a few hours, but the epoxy used in the repair should dry over night.
Identifying exactly where an audio problem is coming from can be complicated, especially if you have a large or complex home system. Even if you haven't yet traced the problem back to your Revox B251 integrated amplifier, there are still some basic troubleshooting steps you can take to remedy any problems.
Adjusting the bias on your Super Reverb Amplifier allows you to control what type of sound you get when you use it. If you use a lower number of milliamps (mA), you'll end up with a thinner sound -- but your power tubes will last longer. If you use a higher number of milliamps, your power tubes won't last as long, but you'll end up with a warmer, more distorted sound. You can change the bias of your amplifier to suit your own musical taste.
One of the most distinguishing features of Luxman amplifiers is the use of vacuum tubes for amplification, rather than integrated circuits and transistors. While tubes provide a warm, analog sound that many audiophiles prefer, maintenance is periodically required, often in the form of output tube replacement. For optimal performance, tube circuits must be adjusted for replacements, a procedure called "biasing." Luxman amps, like the MQ-88, come equipped with a meter and adjustment points.
Potentiometers are made up of fixed resistors and movable slides, called taps. Potentiometers are forms of resistors that regulate voltage flow from a power source. Potentiometers are variable resistors, however. They allow the flow of power to vary based on the power required for the application. The potentiometer has negative, ground and variable, or positive, output terminals. As the slide moves along the resistive material, the voltage output increases. The voltage output decreases as the slide moves toward the ground side of the potentiometer.
The Parasound P3 stereo preamplifier is a high-end unit, built with high quality internal components and a sleek modern design. The Parasound P3, like many stereo preamplifiers, lacks a dedicated subwoofer output. Fortunately, there is a conventional technique to bypass this apparent limitation, adding deep solid bass to your two-channel system.
Preamplifiers and receivers connect to external amplifiers, which boost the signals provided by the preamp. Linking the two devices are interconnect wires, typically either RCA or XLR-style cables. Disconnect the preamp or receiver from the amplifier when one of the components requires service, or if you introduce an upgraded component.
Many newer integrated amplifiers are moving away from including headphone jacks. If this is the case with your integrated amplifier, there is still a way to hook up your headphones to it. In the absence of a headphone jack there will always be at least one set of red/white RCA audio output ports on the back panel. With the use of an inexpensive converter cable, the RCA audio output can be converted to a standard 3.5 millimeter headphone jack.
Many musicians believe that you can’t beat the sound quality of a traditional valve amplifier. Compared with semiconductor-based equipment, the performance of a valve-driven amplifier compensates for its bulk and lack of robustness. Vintage amplifiers often suffer failures of the multisection electrolytic can-type capacitors used in power supply filters. Buying replacements is no longer an option, so many enthusiasts prefer to build new can capacitors instead.
Electronic amplifier designs fall into a set of general classes, called Class A, Class AB, Class B and so on. A basic Class D amplifier has better energy efficiency than the common Class AB found in stereos, though it has severe distortion. Recent improvements to the Class D circuit have circumvented the distortion problem, creating an amplifier with high efficiency and good fidelity.
A music device that interfaces with your computer, Numark’s NS7, includes two turntables and Serato ITCH technology that manages the mixing of music tracks. The device also includes ports for connecting one or more amplifiers. This feature lets you connect the NS7 to an existing public announcement or music system. The NS7’s on-board controls let you quickly control sound levels related to any amplifiers that are connected to the device.
The bi-directional amplifier is used to boost the same amount of current or signal generated into two different directions. This type of amplifier still has one input connection, but has two output connections. Unless you are experienced in building electronics, you will not be able to make a bi-directional amplifier from scratch. The best way for a layman to make a bi-directional amplifier is to combine two amplifiers. This can be accomplished by anyone who can use basic hand tools.
Amplifier wattage ratings are an important consideration when matching power to speakers. All speakers have an ideal wattage range, and it's crucial to ensure that you aren't over- or under-powering them, for maximum sound quality. Assuming a speaker is compatible with a 200W amplifier, you will notice increased volume and dynamics over using an equivalent 100W model. This volume and dynamics increase can be measured in decibels (dB).
Marantz components are widely regarded as “top of the line” audio products. The 2270 receiver dates back to the mid-1970s, and it continues to curry favor with audiophiles. Impedance matching speakers to amplifiers is crucial for optimum performance of both. The 2270 is rated for 8-ohm speakers. Using 16-ohm speakers represents compromises.
Amplifiers powering a well-made speaker offer an engrossing audio experience. Determining the actual volume of sound the combination produces allows you to level match a stereo pair of speakers, or an entire surround array. Level matching ensures that all system speakers output at the same level, producing even sound throughout the listening space. Sound pressure level meters are hand-held devices, allowing you to quickly ascertain the volume in decibels that a speaker is producing.
If you want to get the most out of your audio amplification setup, adjusting your input sensitivity is of paramount importance. Whether you’re dealing with a home, car or musical instrument audio amplifier, the input sensitivity level performs the same function: filling your amplifier with as much undistorted sound as it’s equipped to handle. Since amplifiers have different limits, the best way to judge is by what sounds good to you.
Modern music and theater systems have increased dynamic range and overall sonic impact. To address this, installing a 340-watt two-channel amplifier can bring the sound to life, providing substantial power to your front speakers. Wiring the amplifier correctly helps ensure that the dynamics and bass impact you expect from an amplifier in this power range are delivered accordingly.
Bridging a 1,000-watt amp follows the same procedure as any multichannel bridgeable amp. Bridging allows stereo amplifier channels to work in tandem, providing combined wattage from each channel to drive a mono speaker system. In the case of a 1,000-watt stereo amp, each amplifier channel will output 1,000 watts to the left and right channel speakers. In bridge mode, the amplifier will output 2,000 watts but will no longer operate in stereo -- a result that is desirable in many high-powered subwoofer installations or to drive full-range live concert speakers. Instructions are for a 1,000 watt stereo amp configured by…
Tube amplifiers have all but been phased out by modern audio technology. However, in some radio stations, tube amplifiers still reign supreme, and tuning them is one of the many steps in keeping them going. A linear tube amplifier takes a sound that is fed into it and plays it louder.
Jon Risch is one of the experts and moderators of the Audio Asylum website. One of his contributions to the world of sound systems is his set of how-to plans for a do-it-yourself AC line filter and surge protector. An audiophile with some basic engineering-type skills can follow Risch's schematic and create his own version of the Risch line filter, with or without the surge protector element.
When deciding on a speaker setup for a 1,000-watt RMS amplifier, consider additional amp specifications and number of speakers to make an informed decision. RMS is considered a reliable wattage measurement in the audio industry, with most amplifiers capable of operating at higher or lower RMS wattages dependent on speaker impedance.
When U.S. inventor Lee De Forest patented the triode in 1908, he could not have estimated the affect it would have on the world. The triode, or vacuum tube, was the first electronic amplifier and would first revolutionize mass communication, then politics and, eventually, consumer entertainment. Methods of electronic amplification have evolved as new applications demanded different characteristics, and technological advances brought improved sound quality, increased power efficiency and more cost-effective components.
An audio transformer is an electrical transformer used in an audio system. Audio transformers transmit an audio signal from an input to an output without a wire connecting the two. Professionals in the early years of audio used transformers to provide separation between pieces of electrical equipment, minimize interference and balance sound levels between audio devices.
There is no difference between RMS and peak amplifiers, as both terms are wattage ratings that can be applied to any power amp. Amplifier wattage terms can sometimes cause confusion -- particularly when multiple specifications are provided by manufacturers -- so becoming familiar with how amp wattage works can help you in evaluate the right unit to meet your audio needs.
Continuity is the ability of a wire or an electronic component to carry applied voltage or current through a circuit. Some circuits intentionally use diodes or resistors to shunt the flow of voltage or current through it. This is to prevent electrical shorts. A loose, poorly soldered or malfunctioning wire can render a circuit useless. If a bad wire is suspected for causing a malfunction in any piece of electronic equipment, the wires can be tested easily with the use of a digital multimeter. Digital multimeters are hand-held diagnostic tools that measure in several different modes including voltage, amperage, capacitance…
The question of whether a lower ohm amplifier is better than a higher ohm amplifier depends entirely on the speakers used. In addition to other specifications, amps and speakers are assigned ohm ratings -- a voltage resistance measurement. Speaker ohms vary with model, so most amplifiers are capable of handling several ohm loads for universal compatibility. The best power amp choice -- regardless of ohms -- is that which will most efficiently drive your speakers while providing adequate power.
Integrated amplifiers are electronic devices that incorporate an amplifier and pre-amp controls into a single unit. You may have one hooked up to your speaker system, with a CD player, DVD player and perhaps other devices wired into it. An integrated amplifier is like a receiver, but without a tuner to pick up radio.
Stereo preamplifiers are intermediary devices that take signals from source devices such as CD players and send the signal on to amplification. On occasion, whether due to service needs or personal preference, it is necessary to replace the preamp for a newer or sonically different model. Fortunately, the vast majority of preamplifiers wire between sources and amplifiers in nearly identical fashion, making the swap increasingly familiar from unit to unit.
Audio systems sometimes require that extra oomph to achieve that extra measure of impact and dynamic response. The most common way of doing this is by connecting a powerful amplifier or subwoofer to the preamplifier outlets. These are audio jacks present on the back of audio receivers and preamps that send the audio signal to an outboard amplifier. In turn, the amplifiers provide a higher level of quantity and quality of power to the connected speakers.
Both class D and linear amplifiers are electronic circuits designed to boost the power of low-level input signals. Linear amplifiers follow traditional electronic design rules, using transistors or tubes to smoothly control an output current. Although more complex, class D amplifiers work by turning transistors completely on and off at high speeds. This unusual approach produces high power outputs with very high efficiency.
You can measure audio signals in two different ways: as a peak value or as a Root Mean Square (RMS) amount. Though these figures are both based on the same source, they tell you two different things. The peak value indicates the momentary maximum value the source produces; RMS reveals the sustained or steady-state amount. The RMS value is the more conservative measure of the two, and gives you a more accurate idea of an audio component's performance.
An amplifier is an electronic circuit that increases the voltage or current of a weak incoming signal. It is a common circuit, used in many consumer goods, including cell phones, electronic musical instruments and televisions. Since the early 1900s, engineers have developed many different amplifier designs, each having different trade-offs for efficiency, complexity and distortion. A low-distortion amplifier produces a clean, clear output signal that closely replicates the original.
Electronic devices like audio equipment put out a signal that must flow against the current in an alternating current circuit. The opposition the signal from the electronic device faces in the circuit is known as impedance. If you have an audio device like a guitar or microphone that outputs a high impedance signal, you must attenuate, or reduce, the impedance level if you plan to send the audio signal into a device with a low impedance signal. This will balance the signals and prevent any excess noise in the high impedance signal.
A TV amplifier is a circuit that goes between the signal and the television set. The circuit increases the power of the signal coming from the antenna, before sending it on to the television. Signal amplifiers are suitable for strengthening weak signals to improve the picture and audio quality on your TV. To save money on the amplifier, purchase the necessary components as part of a kit, then assemble at home. You typically only need a soldering iron, solder and screwdriver to successfully assemble the kit.
Luxman produces high-end home audio amplifiers. Usually valve powered, these devices use a set of vacuum tubes to balance voltages between the different power stages of the amplifier. Tube amplifiers produce warm, organic tones, but they need to be properly balanced in order to protect the equipment and produce the best sound. Adjusting the bias determines the ratio of voltage load between the tubes.
Building a home theater tube amplifier is no different than building any audio tube amplifier. The character of tubes is thought to add a warmth to sound that is lacking in digital signal processing. There are many tube amplifier kits available, from very basic to audiophile quality, but it is a devoted do-it-yourselfer who will build a home theater amplifier when so many surround-sound processors for home theater are both convenient and of very good quality.
Parallel wiring decreases the ohm load in a system. Parallel wiring allows you to use two subwoofers with ohm loads twice as high as your amplifier’s. For example, if you want to wire two 4-ohm subs to a 2-ohm amp, you’ll need to use a parallel wiring scheme to bring the load from the speakers down by 50 percent. Be sure to note whether your subs are single voice coil or dual voice coil. SVC subs have two terminals and DVC subs have four.
To get the most out of your two-ohm amplifier, wire it to a two-ohm load. Wiring your two-ohm amp to a four-ohm load drops the output of your system by 50 percent; wiring it to even higher-ohm loads drops the output even further. Avoid wiring your two-ohm amp to a load under two ohms because your amp will be overloaded. When wiring your amp to subwoofers, choose two-ohm subs. Note whether your subs are Single Voice Coil, or SVC, or Dual Voice Coil, or DVC; SVC subs have two terminals and DVC subs have four.
The Dayton SA1000 amplifier is commonly used among the do-it-yourself community to power passive subwoofers. The amplifier, rated at close to 500 watts at eight ohms and over 900 at four ohms, is capable of driving a wide array of subwoofer drivers. Bridging the amplifier to extract the most power possible is sometimes desired, depending on your individual audio needs.
Sonic Maximizers process the digital audio signals from your amplifier to reduce unwanted distortion in the audio from your loudspeakers. You can connect your Sonic Maximizer between the audio mixer and your speaker system to deliver high-quality audio signals using the Maximizer's dual processors. Sonic Maximizers connect with standard audio cables and do not require additional software.
Push-pull refers to a type of output circuit in an amplifier. A push-pull type amplifier has equal negative and positive current, created by a complementary pair of transistors or tubes. Push-pull circuits are typically efficient in how they amplify sound, resulting in less distortion. They are generally used for high-spec home audio amplification for this reason. Where efficiency is high, gain is typically low. Gain refers to the strength of the signal delivered by the output circuit. If you want to increase the power of your amp, you can modify the circuit to increase the gain, but the efficiency of…
Most modern receivers and other audio/video equipment include analog, including RCA, and digital connection ports. However, older two channel amplifiers or receivers usually have only analog inputs for source components. In most cases, you can connect a DVD player or other video device to an analog amplifier using a standard RCA cable. However, if you are already using the RCA audio connection on the DVD player to connect to a PC or other device, only the digital TOSLINK or coaxial port remains available for use. Because older amplifiers do not have digital coaxial, such as S/PDIF, or TOSLINK ports, you…
The best way to amplify sound with a drum is to use at least two amplifiers. It doesn't matter whether you use a drum amp, bass amp or guitar amp for sound. In addition, many electric drums don't have a built-in amp, therefore, you must amplify the sound being produced through the use of speakers. Although you can hear sound from your drum while wearing headphones, you need to use amps if you play live at a concert.
Making a low-frequency amplifier involves adding a low-pass filter to a standard amplifier. That can either be done before the input or after the speaker output stage. Electronic crossovers are the easiest, most accurate and most adjustable way to limit an amp's frequency output. These are inserted between a preamplifier or head unit and the amp with RCA signal coax. The filter frequency is variable, so fine tuning is possible, and crossover slopes are typically steep to limit interference with main speakers. Speaker-side filters are permanent and not adjustable, and tuned to specific subwoofer drivers and impedances.
If you have separate home-audio components, such as a stand-alone CD player, tuner and turntable, your amplifier is an important part of your setup. The home amp supplies the power for the speakers, by amplifying the signal from the various audio components sufficiently to drive the speakers. If your amplifier is not working correctly, troubleshooting is an effective way of determining the nature, location and severity of the problem.
Dynaco was a pioneer manufacturer of hi-fi amplifiers and pre-amplifiers in the United States. Its products are still considered classics by a core of enthusiasts who collect, upgrade and swap Dynaco hi-fi equipment. The Dynaco 120 (ST-120) was one of the first transistor-based stereo amplifiers. It usually needs to be connected to a pre-amp to power components, including tuners and tape decks. The Dynaco PAT-5 is one of the pre-amplifiers that was designed to complement the ST-120, and connecting and using the two pieces of equipment together is simple.
Optimus is a Radio Shack house-brand name. Radio Shack has put out several Optimus PA amplifier systems, each with different power capabilities. For example, there is the Optimus MPA-40 20-Watt PA Amplifier and the Optimus MPA-50 40-Watt PA Amplifier. The process of hooking up a speaker(s) to an Optimus PA amplifier is the same no matter what the power level is for the amp you are using. If you plan on connecting two speakers to your Optimus amp, make sure both speakers have the same impedance rating.
Most portable CD players and personal music devices lack an internal speaker; therefore, these devices must be used in conjunction with external speakers or headphones. If you are in a large room, listening to the audio from a CD player or personal music device can be difficult if the attached speakers are not amplified. Fortunately, you can build a small but powerful amplifier out of a few common electronic components.
Basic circuit components like inductors, resistors and capacitors are generally used to add inductance, resistance and capacitance to a circuit. However, the physical package of the circuit component often have small amounts of inductance, resistance and capacitance. These properties are generally insignificant until a circuit begins operating at a high frequency. For example, the leads of a capacitor will generate significant inductance at around 500 megahertz. This inductance can alter the circuit in unexpected ways, so it is best to minimize the inductance of a capacitor for high-frequency circuits.
If you have separate stereo components, such as stand-alone CD players, tuners and passive speakers, you require a stereo preamp to boost the signal from the audio devices. This will ensure the signals from the audio devices are sufficiently strong enough to drive the speakers. A stereo preamp is configured to be efficient and emit as little noise as possible in order to increase your listening pleasure. By building your own stereo preamp, you can determine the specifications and save money on potentially expensive audio equipment.
Tube guitar amplifiers are sought after by beginning and professional guitar players alike. In most cases, tube amplifiers offer more amplification power and better tone control than standard solid state amplifiers. One of the challenges of owning a tube amplifier, however, is keeping the circuitry in good working order. As the tubes in an amplifier get older they draw draw less power, causing a voltage imbalance among the tubes in the amp. This is fixed by tube calibration through a procedure called biasing, which allows you to balance the power among the amplifier's tubes.
The Logitech Z5500 is a 5.1 digital speaker set that can control the sound for several devices such as iPods, video-game consoles and computers. Once the speakers are hooked up, you can customize the sound quality emitted from each device through the speaker controls, the computer and sometimes through other devices, depending on whether the device has sound-configuration options.
Amplifiers supply power and audio signals for speakers. Channels are the terminals that connect the amplifier to the speaker. In conventional stereo systems, there is one channel for each speaker. For example, a two-channel amplifier would have two speakers connected to it, one for each channel. A two-channel amplifier has a left and right channel. However, four speakers can be connected to two channels by adding two connections to one channel. The power received by each speaker will be divided by two after this is done. For example, if the channel outputs 500 watts, after two speakers are connected to…
German physicist Ewald Georg Von Kliest first discovered capacitance in 1745 using a generator, some wire and water in a glass jar. Von Kliest found that his device could store energy when voltage was applied to it. Modern capacitors are used to store charge and are often used to block direct current while allowing alternating current.
For home audio systems comprised of separate components, such as a tuner, turntable and CD player, it’s necessary to use a stand-alone amplifier to power the signal from the audio components. A phono stage preamp is specifically configured to efficiently amplify the signal from your turntable. Since each piece of stereo equipment has a different impedance, using a dedicated amp for each ensures optimal performance. Purchasing an amp for every audio device is expensive, but you can save money on expensive preamplifiers by building your own. Using a self-assembly kit ensures that the parts are compatible and made-to-measure.
Adding a split to an amplifier allows you to send the output to additional speakers or subwoofers. To do this, you will need to utilize an audio Y-adapter to split the output from one to two. This will allow you to attach your subwoofer cables. You can obtain the Y-adapter and the subwoofer cables from any audio supply store.
Servos are used in amplifiers to control the cone motion of an attached speaker. The servo, connected to an accelerometer, measures the output of the amplifier relative to the subwoofer or other driver, preventing excessive excursion and distortion. However, all of these operations often cause noise to inject itself into the audio chain, mainly due to improper wire routing and bundling from the factory. Mitigating this servo noise is done by a few simple internal modifications, predominantly involving isolating signal from motor wires and internal shielding.
High frequency amplifiers have a range of between 3Mhz and 30Mhz, making them suitable for amplifying weak ham radio signals. They enable you to expand the distance over which you can transmit and receive radio communication. Solid state refers to any amplifier that is transistor-powered, as opposed to vacuum tube-powered. Solid state amps are typically cheaper and more reliable than tube amps. Tube technology is still desirable for instrument and audio applications due to the warm tone. But for scaling up a high frequency signal, transistors are typically more reliable.
When you design an enclosure for electronic equipment, for every drop of 10 degrees Celsius or 18 degrees Fahrenheit you can expect double the life expectancy before failure. The size and material of the cabinet and whether you have cooling fins for heat dissipation and heat-conductive material between heat-producing components and the outside of the cabinet are all critical factors. How crowded the cabinet is, how many objects impede airflow and whether you are using fans to cool the cabinet all help or hinder the design object of lower temperature. Heat dissipation depends on outside surface area, not cabinet volume.
The job of a preamp is to boost the signal of an audio source to a level sufficiently powerful to drive the speakers. Integrated stereo units typically have a built-in preamp, but a stand-alone CD player requires a preamp in order to be audible. A preamp must be efficient in the way it does this. Low efficiency equals high levels of noise, which will undoubtedly ruin your listening pleasure. Building your own stereo preamp lets you determine the specifications of the device, while saving money on potentially expensive audio equipment.
Capacitors store electrical energy on two or more plates separated by an insulator. Capacitance is measured in units of “Farad.” For smaller capacitors, capacitance is generally measured in microFarads or picoFarads, expressed as µF and pF respectively. Capacitor coding may be expressed as numbers and letters or in color code. Both numbers and colors are used to decode capacitance and tolerance. Capacitance is expressed as a measure of Farad, and tolerance, as a percentage.
A potentiometer is a type of variable resistor distinct from a fixed resistor because it has a sliding adjuster. Potentiometers are typically connected to dials. The position of the dial determines the position of the sliding adjuster, which in turn governs the amount of resistance applied to the flow of current. A potentiometer controlling a circuit loop — in a guitar amplifier, for example — may cause noise during operation. You can take multiple noise-reduction approaches to solve this problem.
The Luxman L-430 is an out-of-production 105-watt amplifier that was introduced in 1981. Many thousands of these integrated amps are estimated still to be making music around the world. The L-430 was designed to be used in high-end home audio audio systems; it is highly efficient, has low distortion and a Duo beta circuit, with DC servo and high stabilization. The L-430 also came equipped with an equalizer and tone controls.
The world of electronics, with its technical terms and specifications, can be more than a little confusing for the novice. When you go shopping for stereo equipment, one of the terms that you're likely to see is amplifier class. The classes of amplifiers are numerous but the most common ones are Class A, B and AB. These classes are defined by how long, relative to the input signal, current flows in the output circuit.
Amateur or "ham" radio is a rewarding hobby that lets you communicate with other radio-enthusiasts. High frequency amplifiers boost the strength of your signal, enabling you to send and receive communications over a wider area. If you like to travel with your ham radio equipment, you need a mobile HF amplifier. You can build your own compact and light-weight amplifier. This is an inexpensive approach to acquiring a piece of custom radio equipment built to your personal specifications.
All electronic devices, from cellphones to speaker systems, use intricately designed components for creating functional circuitry. Electricity flowing through a circuit must be manipulated to allow a user to call a friend or listen to music. Capacitors are basic electronic components found in almost any device. However, specific components, called electrolytic capacitors, can be prone to popping.
The Crate Limo is a small, portable amplifier that uses a rechargeable battery for power. This amplifier features a 10-inch speaker with a strong outer case that may be positioned in any number of ways. Even though this particular amplifier is compact in design, the built-in DSP effects, two channels and both XLR and quarter-inch inputs suggest its professional capabilities. While the battery is rechargeable, there are a number of scenarios, such as overheating or extended battery life, that may require you to change this power source.
Citizen's Band, or "CB," is the frequency over which two-way radio hobbyists communicate. The 27 MHz frequency band is reserved exclusively for CB use. A CB mic preamp boosts the strength of your broadcast and increases the capacity of your transceiver to receive signals from farther away. You can save money on CB preamp equipment by building your own. This way you get a relatively inexpensive, unique piece of radio equipment.
Replacing 5881 vacuum tubes with EL34 tubes is not as simple as changing a lightbulb. The EL34 draws more current and runs hotter than the 5881/6l6, requiring a different circuit, with higher value screen resistors and a complete rebiasing. This modification requires a thorough knowledge of electronics and keen soldering skills. If you don't know a screen resistor from a filter cap, you should take your amp to a qualified and experienced technician who will happily perform this service at a nominal fee. The 5881/6l6 is found in a range of amp circuits. The general directions here are for a…