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How to hook up amplifier and sub but radio has only one RCA output for Subs - (have MTX Thunder four channel amp and thunder dual 12" MTX 4 olm subs with one input ( /-) can you help how do I use one RCA output and bridge amp to play subs - i just need them for base the 6x9's will handle the rest from a different amp)- I have a TA-3404 amp and roadthunder RX122 12" 4 olm subs in a sub box with one /- wire hook up by the way the head unit has one center rca output is that useable or should I use a splitter for sub jack turning one into two? thanks

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blueextc3221
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SOURCE: My amplifier has one pair of rca inputs. radio only has 1 output

Subwoofer signals should be MONO - not stereo (hence the single Component out on the radio)
Only use one RCA to send signal to your amplifier.

If you use a Y splitter - the signal voltage will be cut in half - deteriorating the quality, and therefore amplifying "dirty" signal.

If you require further help, simply reply to this thread.

Thanks for using FixYa - a FixYa rating is appreciated for answering your Question.

Posted on Apr 09, 2009

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I have 4 mtx 9500 12in subs 2 of them is on a mtx 92001 and the other is on a mtx 4001d . would it be better to run all four on the mtx 4001d. for more power and a better sound or how should i run this set...


NEVER mix different power amps. Depending on the ohms of your subs, sell one of the amps, up to you. The 4001 has more power, but either amp will do the job, the amp needs to see a 1 ohm load, so your subs have to be dual 2 ohms, or single 4 ohms to do this. If your subs are dual 4 ohms then you will have to run your amp at 2 ohms which would be have the power, or a half an ohm, (Not Recomended) and be at double the power. You may be able to do a competion sound off and just "Burp" the subs, but at a half an ohm, dont expect to listen to it to long before it goes into protect and shuts down.

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Can you bridge 2 4 ohm kicker speakers to a mtx thunder 7801 amp?


Ya. Just hook one sub to your amp (bridged) and hook the other sub (positive and negative) to the first subs positive and negative

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turn down music open sub box and put another speaker at wire and check again if work means sub is ok if not check the signal cable, and put there the speaker to try signal

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Is there a option on the chanels that say ''Bridged''? If so, you can hook the subs up in parellel or series to get different ohm loads. Usually the lower ohms, the more power amp puts out. Those subs can handle 225 watts RMS whitch means the power it can handle constantly. If the amp gives more than 225 watts RMs, you could be at risk of blowing the sub. If you could give me the model # of the amp, I can be of more help.

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first of all you should check the minimal impedance your amp handles , if is class d it should handle between 1-2 ohms total impedance in a mono conection , meaning whatever quantity of subs you have hooked to your amplifier,their total impedance should the minimum the amp handles that way all the power from your amplifier will be used.

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If the amp produces no boom with no signal input cables connected, I'd suggest using an LOC.

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check your fuse up front first. some amps will turn the light on with only the remote wire (the 12 volt signal from the head unit). That may be your issue. If not you need to check your signal input. try hooking the rca's to a diffrent source, i.e. other radio your tv anything with Rca out put. If still you get nothing then pull your subs out and take a regular 9 volt battery and touch the leads to the positive and negative of the sub. Just for a moment though if the subs move when they come in contact with the charge from the battery then my last suggestion would be to take it to a store where you can have an authorized tech check out the equiptment. Good luck

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Are you trying to hook up the subs while it's running? If so a spark would be expected because that's a lot of voltage... (and not a good idea). If you mean when the amps OFF, then the output is shorted to the power supply and the amp is in serious need of repair.

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