Question about Car Audio & Video
I have a sony xplod 1200 watt bridgeable 2 channel amp. I want to run a single hollywood excursion 15 inch subwoofer with as little impedance as possible. the sub is rated `at 1000 rms, 3000 peak. it is a 4 ohm dvc. Wiring diagrams on crutchfield.com show me to run + from channel 1 to + on vc 1 and - from channel 2 to - on vc 2 and connect - on vc 1 to + on vc 2. this will produce a single 8 ohm load on the amp. But my amp will only push an RMS of about 250 watts with this impedance. Is there a way i can wire it to produce less impedance without damaging my equipment?
I.e. instead of running a wire from vc1 - to vc2 +, can i wire the VC's in parallel? can i run each VC seperately off of each channel? can i do anything to reduce impedance?
A 4 ohm DVC sub can be wired in series like you described for an 8 ohm load or the voice coils can be wired in parallel for a 2 ohm load.
If your 2-channel amp isn't stable down to 2 ohms when the channels are bridged (most 2-channel amps are only stable to 4 ohms when bridged), you do not want the voice coils paralleled. The amp will overheat, go into protection mode, and eventually fail completely. A sub with 2 ohm voice coils would be a better fit. That way, you could series the coils for a 4 ohm load and the amp would operate OK with the channels bridged into that load.
But anyway, for the best power from THAT amp to THAT sub, your best wiring solution would be to wire each voice coil to a separate channel. The problem with that is that the signal to each coil needs to be EXACTLY the same or you will have one coil trying to move the cone out while the other one tries to move it in. You can closely approximate identical signals on the output side by using the same input to both channels. Do this by using only one RCA connection (either right or left channel) from your head unit and split it with a "Y" cable.
Hope this helps.
Posted on Sep 13, 2009
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Posted on Jan 02, 2017
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This will allow 2 channels to run 100 watts each @ 4ohms with an additional single channel with 250 watts @ 4 ohms.
The single sub channel is created by bridging channels 3 & 4
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