![]() ![]() DIY Audio & Video Tutorials, FAQs, Calculators and Examples for Speaker Boxes, Crossovers, Filters, Wiring, Home Automation, Security & more DIY Audio and Video. When this is all distilled down, you'll find that 16 gauge wire works for most home applications unless you have your amp a long way from the speakers (which you shouldn't do anyway). Learn how to wind your own Inductor using thick copper wire for a low resistance coil. Of course, if you want to know for sure then you have to look up the impedance graph on the speaker and start calculating. So for an 8 ohm speaker you'd want less than 0.8 ohms in the cable. When you size the gauge of the cable to minimize this resistance, odds are that the cable is going to work fine for whatever current you actually need to move- unless you're doing pro-audio and have several kilowatt amps.Ī really rough rule of thumb is that you want the cable resistance to be less than 10% of the nominal speaker impedance. The end result of this is that the higher the resistance of the cable, the more the frequency response of the cable is going to be affected. That means that the voltage divider is more like 30:40, or 75 watts from the 100 watt amp output is making it to the speaker. But at 2 KHz the speaker impedance is about 30 ohms. So if the amp is spitting out 100 watts, only 33 watts is making it to the speaker. Audiophiles should always wish to minimize speaker cable resistance. In this case, its usually best to follow the advice of the Borg 'resistance is futile'. This effectively makes a voltage divider that cuts the power going to the speaker by 5:15, or 1:3. The higher the gauge, the more resistance. Want to make sure youre using the right gauge wire for your car audio system Then, youve come to the right place This speaker wire gauge calculator is. At 500 Hz the speaker has a 5 ohm impedance. Now, let's say that your wire has a resistance of 10 ohms (that's super high, but I'm illustrating a point). Notice that the average impedance is 8 ohms, but really varies between 4 and 33 ohms. Here's a graph that shows the speaker impedance and frequency response The net effect of this is that the resistance of the wire will change the frequency response of the speaker. (Note: you can almost use the terms resistance and impedance interchangeably in this context.) When you combine the wires resistance with the speakers impedance you'll get, basically, a voltage divider. To calculate the proper power and ground cable sizes, find the distance of. The #1 issue with speaker cables is that they have a fixed resistance, and the speaker has a impedance that varies with frequency. Recommended Car Stereo Wire Gauge Sizes, Power, Ground, Fusing Chart, Speaker. ![]()
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