speaker level inputs, alpine amp

I've searched the forum a bunch of times and no one has really asked this/had a definitive answer. I figured I'd ask the professionals before i brought it somewhere or bought another piece of equipment.

It is a Mono block Alping amp with 4 speaker level inputs.

I have it wired as rear left and right go into the inputs <----- This makes it so i have to fade to rear for subwoofer to work properly with max juice

how i want it wired, is that it should have 8 speaker level inputs, so i can have it faded in the middle and still have the subwoofer to work properly.

Is there any way to achieve this with the current amp i have, because its a pain in the ass listening to music from the rear of the car and the passengers are like why is it so loud back here and not up there....

Thanks 12volters!!!

I'm glad someone replied, thanks!.... Here's the specs

Alpine MRP-M350 Specs

Operating Voltage:
14.4V DC (11V to 16V)
Rated Power @ 14.4
200 Watts into 4 Ohms, 350 Watts into 2 Ohms & 700 Watts max power

Measured Power @ 14.4 Volts 1% THD:
255.5 Watts into 4 Ohms, 396.7 Watts into 2 Ohms (Max power rating not achievable with acceptable distortion)
Current Draw @ Max Power:
21.3 amps @ 4 ohms, 36.8 @ 2 ohms
Efficiency @ Max Power:
83% @ 4 ohms, 75% @ 2 ohms
Efficiency at 1/3 rated power:
83% @ 4 ohms, 75% @ 2 ohms
Amplifier Weight:
5.5 Pounds (2.50kg)
Amplifier Dimensions:
9-1/2¡¨ x 2-5/16¡¨ x 10-1/2¡¨
(241mm x 60mm x 233mm )

Why not just get a line out converter, then run a set of RCA's from that directly to your amps rca input.  That should fix your problem! 

If you want to use the amp's high level inputs then switch to the front speakers for signal.  The sub signal will stay as strong as the fronts and you can still fade the rears away if you want to.  You would do the same thing even if you used an aftermarket 2 ch line output converter, since your amp only accepts a L R signal.

When you run speaker wire for signal to any high level input, you should use twisted pair wire.  That is, the + and - are twisted around each other instead of running parallel  like you commonly see speaker wire.  You can buy it that way or twist it yourself.  This twisting of signal wire inhibits the induction of noise into the amplifier's input stage.  It is especially more important when you run longer runs from the front speakers back to the trunk area.

Don't splice wires together like your diagram shows.

i could run an inline converter, but was trying to see if it was attemptable with the setup i have currently

I don't see why they would make an amp where you couldn't do that

I understand you about wiring to the fronts, but wouldn't that just be shifting the problem, meaning i would have to fade to front now to get maximum power to subwoofer? then it would be overpoweringly loud in the front i would imagine.

I figured to twist the wires, but i heard only if the power wire runs the same side as the speaker wire, also its only like a 3 1/2 foot run if that.

and i wasn't going to splice wires like that im sure there would have been something bad to come of it ! hahahah, that would be the last thing i need right now!

nexus1155 wrote:

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I don't see why they would make an amp where you couldn't do that

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So you will buy an Alpine radio with a dedicated subwoofer output.

JBl makes several subwoofer amps with 4 input channels.