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Date: March 28, 2002 at 17:01:56
From: Jason U., [ip68-3-156-181.ph.ph.cox.net]
Subject: Re: Help with 8 sub wiring |
URL: Electro's Realm |
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Use a two channel amplifier. Mix both the left and right from audio source. Then add a y-connector to it to for the two channel amplifier.
For the subwoofer. First, connect two woofers in series. Next do the same with other two woofers. Third connect both of them in parrallel. Gives a saftely 4 ohm load instead of current hogger 2 ohms or 1 ohms. Repeat steps for the next channel.
If you want the same wattage output for all 8 speaker drivers. Use an 8 channel amplifier if you can find one. Then hook all the speaker drivers to each of the amplifier's outputs. Then make a mixer and an audio distributor. Using a Y-connector will put to much load on the audio source. If the 8 amplifiers have FET inputs than you can do it because FETs have a impedance than transistors.
The correct equation to calculate parallel speaker drivers or resistors:
Rnew = 1/(1/R1 + 1/R2 + 1/R3 + 1/Rn)
To calculate for speakers drivers or resistors connected in series:
Rnew = R1 + R2 + R3 + Rn
Rn - for infinite speaker drivers or resistors in the circuit
Table to compare speaker loads
-----------------------------------
8 ohms @ 100 watts = 3.535 amperes
4 ohms @ 100 watts = 5 amperes
2 ohms @ 100 watts = 7.07 amperes
1 ohms @ 100 watts = 10 amperes
Each load the voltage change but you can see 1 ohm loads can destroy the output device.
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