4-ch amp to mids and sub.....

[yotabeater 10+ year member]

wondering how i might go about running a pair of components and a 12 off my 4-channel amp. i figured bridge the front channels to the components (put both sets of wires in together), and bridge the rear channels to the sub. is this a 4-ohm load? or would that be running the front channels at 2 ohms and the rear at 4? don't want to f*** something up. thanks. -Josh

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[squeak9798 5,000+ posts]

You're overcomplicating it.

Just run your component set off of the front two channels like "normal"...i.e. don't bridge the amplifier. Just wire the left side crossover to channel 1 and the right side crossover to channel 2. Then you can bridge the rear two channels to a subwoofer, assuming you don't use a subwoofer with a final load lower than what the amplifier is stable to. And, considering most 4-channel amps are only stable to 4ohms bridged, don't run a subwoofer with an impedance lower than 4ohms.

 

[jeeper07 5,000+ posts]

^^^ yep

 

[yotabeater 10+ year member]

i'm running an alpine type r 12 dvc (4ohm), but i'm only running one voice coil since i don't have enough power to run them both. so is it a 2-ohm load if i have the front channels bridged to the components?

 

[supa_c 5,000+ posts]

Get a new amp, it will solve all your problems.

 

[squeak9798 5,000+ posts]

i'm running an alpine type r 12 dvc (4ohm), but i'm only running one voice coil since i don't have enough power to run them both.

Please do not run only a single voice coil on a dual voice coil subwoofer. It completely changes the parameters of the subwoofer aswell as the required enclosure size. If the subwoofer has dual voice coils, run both coils.

so is it a 2-ohm load if i have the front channels bridged to the components?

It doesn't matter as you DO NOT want to do this. It would result in mono sound, not stereo. You want your front speakers to maintain their stereo sound....it would sound aweful otherwise.

 

[bean-a-reano 10+ year member]

Wire your components off of the 2 front channels. Then Wire one sub voice coil to each remaning channel (rear 2) Then you will see a 4 ohm load over all channels. You follow?

 

[camry_tuner 10+ year member]

Wire your components off of the 2 front channels. Then Wire one sub voice coil to each remaning channel (rear 2) Then you will see a 4 ohm load over all channels. You follow?

he could do that, or just run the sub off one channel @ 2 ohms, cuz either way, its approx the same power...

 

[Mx3guy 10+ year member]

Yeah cuz if you have a dual 4 voice coil sub your not going to be able to bridge it cuz it will be at 2 ohms.

Do this hook up each of the subs voice coils to the rear two channels. One coil to the left the other coil to the right.

 

[n2audio 5,000+ posts]

he could do that, or just run the sub off one channel @ 2 ohms, cuz either way, its approx the same power...

It would make a lot more sense to just run it at 8 oms bridged.