Adding audio amp. Bridging questions.

[danford1]

I'll paraphrase:

I have the 6 speaker factory radio.

I replaced the front speakers with 4 ohm Pioneer 6X8's. Sound great.

I unhooked the rear door speakers and installed two 4 ohm 6X9's in the rear deck hooked to the rear door wires.

Sound good but not as loud as factory.

I bought a Sony amp, model XM-GTX6040. Specs ( http://www.sony.lv/product/icp-stream-amps/xm-gtx6040/tab/technicalspecs#pageType=TechnicalSpecs )

I only hooked up the rear portion of the amp and I'm using the speaker wire high level inputs, not the RCA jacks.

I hooked the 6X9's up. Everything sounds Very good.

 

Next step.

I have a 10" 4 ohm single voice coil sub in a single box.

I unhooked the 6X9's and hooked the sub up to the bridged outputs L+, R-.

Sounds good.

Now I want to hook up the 6X9's AND the sub.

Here is my question.

Can I bridge the inputs of the amp together? I mean can I take say the speaker wires and hook them to the front AND rear high level inputs on the amp at the same time? Like L+ high level input to front And rear L+, L- high level input to front And rear L-, etc...

That way I can use the front input section of the amp for my 6x9's and the rear portion of the amp for the sub woofer. A 3 ch set up using 2 ch input.

 

Is this a common hook up?

 

Danford1

[5150mikey]

You need to hook the 6x9's to the front speaker section, and than Hook the Sub to the rear speaker section, You can bridge them to the perspective locations, But you won't be able to bridge them between the two different sections front, or rear. Hope this Helps.

 

 

[akirby]

You need to hook the 6x9's to the front speaker section, and than Hook the Sub to the rear speaker section, You can bridge them to the perspective locations, But you won't be able to bridge them between the two different sections front, or rear. Hope this Helps.

 

The question was on the input side of the amp, not the output. Can you take the left speaker level wire from the left rear door speaker and split it to both the left front and left rear speaker level inputs on the amp.

 

I think so because I assume the amp converts it to line level before it's re-amplified so you're not really driving 2 amplifiers off one channel, but you should get a professional opinion on this - I'm just guessing.

 

Worst case you could get a line converter and split that into the line level inputs.

[danford1]

I solved it. I did some internet checking first though to confirm I could do this on a cheap Sony amp :-)

I took the speaker level input wires on the amp and hooked them together (matched polarity of course). Then I hooked the 6X9's to what was listed on the amp as front output. I hooked the sub up to the bridged portion of the rear output.

Works fine and sounds good.

 

Thanks.

Danford1

[akirby]

I solved it. I did some internet checking first though to confirm I could do this on a cheap Sony amp :-)

I took the speaker level input wires on the amp and hooked them together (matched polarity of course). Then I hooked the 6X9's to what was listed on the amp as front output. I hooked the sub up to the bridged portion of the rear output.

Works fine and sounds good.

 

Thanks.

Danford1

Of course it works - that was never a question. The question is whether it's putting too much load on your factory amp. I know you couldn't do this driving 2 speakers off one channel but since the amp is converting the input to line level it's probably ok. If the factory amp goes out then you'll know for sure. Hopefully it's ok.

[erikduop]

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