Woofer Speakers & Law of Ohm

Video Transcript

"This is a multimeter. You've probably seen this before. If you've taken basic electronics class you know that this is used to measure voltage and impedance. What is impedance? Well if you don't know I'm not going to explain everything today. But the law of ohm is what makes woofers go. For example. This dual two ohm driver. What does dual two ohm mean? Two ohms dual means one two ohm impedance load per set of voice coils. Now when bridging a woofer down. Bridging the woofer in series. Positive to positive. Negative to negative. That would take two ohms down to one. Why you may ask? Well when you connect voice coil to voice coil, polarity to polarity and go to the woofer enclosure it drops the absolute ohm mode from the dual two to the single one. Now what would that do if you ran it in parallel? To increase the ohm mode. Yes you can increase the ohm mode actually. By going positive to negative. And negative to the box and positive to the box. Now what that does is increases the ohm mode and keeps it up high enough so if you have an amplifier that can't handle the low impedance load that you won't fry your amplifier or fry your woofer. That is what makes dual voice coil woofers more costly. Because they give you the versatility of going up or down. And that in a nutshell is a little bit over voice coil and the law of ohm. Now why is the multimeter and the law of ohm important? If you're going to diagnose a problem. Say if you have a fried woofer and you don't want to unload the box you can place these terminal ends, positive and negative, to the terminal ends on your box and figure out, if it's not reading one ohm, if it's not reading two ohm, if it's not reading four ohms, it's probably just reading blah, blah, blah a bunch of numbers across the screen, that means the woofer's probably toast. Or if it's just reading a blank that means probably nothing connected to the woofer or to the connection on the box so you should unload the terminal itself. Check the terminal connection on the enclosure and try to figure it out. So maintenance, versatility, multimeter, the law of ohm."