Sub Installation - Wiring Question

[dd4321]

Hi all

Just about to install 2 x 12"MTX subs powered by monoblock amp with mono input.

My question is: the subwoofer output from my Alpine headunit (CDA 7894) is stereo (L+R channels). If I combined both sub outputs (left & right, + with +; - with -), will this short my headunit as this is technically short-circuiting both channels

Your input is appreciated

Cheers,

DD

[rocketboy]

Not quite sure what your saying...do you mean your amp has only one RCA input, not a pair?If so, using just the left (white) side of the RCA output should work fine. If the headunit sub-out is a dedicated sub-out ie. not a non fading output, this should be ok.

[dd4321]

Yes, the amp only has 1 mono input. I've tried your method by just using the left output from the headunit and so far it works fine. Thanks for the input

[predator]

It wouldn't be "short circuting" the channels, it would just be merging them..

It may be a good idea to bridge both using a Y connector, just incase for some reason the bass is mixed on the left channel a bit different (trance and similar type music can use this for effect). Then you'd only be getting "half" the bass, and it may not come through correctly in the sub. By merging the signal, you are guaranteed of all of the bass, all of the time... and all your bass.. will belong to you

[NashaDaWog]

Predator is giving you bad advice here... You dont want to be mixing bass channels, itll sound even worse than only having one channel! Now, im not sure you know too well what your amp and headunit relationship is here, but even monobloc amps, still have two rca inputs, a white and a red. Your wrong in talking bout the whole shorting thing, but there is no need to even consider such a thing. Also, a tip when wiring your subs to your amp, be sure to use ohms law, and calculate the correct impedence for your speaker setup, to match your amps abilities. Any questions, dont hesitate to PM me