How to Match an Amp to a Sub
Subwoofers are used to reproduce extreme bass frequencies normal speakers cannot produce. Commonly found in home theaters, car stereos and professional music sound systems, non-powered subwoofers -- those with no built-in amplifier -- require a dedicated power amp to produce sound. Matching a subwoofer to an amplifier is an important consideration for most efficient results, and requires only cursory knowledge of component specifications.
Other People Are Reading
Instructions
-
-
1
Choose the subwoofer you wish to purchase and consult the product packaging, owner manual or manufacturer website for a list of specifications. If you already own a subwoofer, check the specifications in the same manner.
-
2
Make note of the speaker's ohm and RMS wattage rating. RMS stands for "root means square" and is a measure of the maximum continuous wattage a speaker can safely handle. An "ohm" is a voltage measurement, also called "impedance," which dictates the ideal recommended voltage emitted by the power amp for efficient sound reproduction.
-
-
3
Choose an amplifier with the same ohm and RMS wattage rating as the subwoofer. Some amplifiers are capable of handling speakers of different ohm ratings, but the wattage will increase as the ohm rating goes down. This ohm and wattage rating will be listed on the power amp specification sheet. Ideally, the speaker wattage should be higher than the amplifier's listed wattage to compensate for "peaks" in power output during loud musical passages.
-
1
Tips & Warnings
If installing an amplifier and subwoofer in your vehicle, ensure they are of suitable size for installation in the space desired.
If you are unsure of specifications or which amp and subwoofer to choose, your audio retailer is an excellent source of information.
Follow all manufacturer's wiring, installation and operational instructions to avoid damage to components.
