Wiring two amplifiers?

[TurdFergueson2 5,000+ posts]

... The reason I'm trying to learn. Getting great help.
Now, essentially, I'll throw out the basic problem. My car has built in 20 watt RMS @ 4 ohms amplifiers for all four speakers in the car. I have a 4 chan amplifier that puts out 55 RMSx4 @ 4 ohms.

I'm replacing the speakers with my own - this is in my new car. Front stage can handle 100 RMS apiece fairly easily, rear fill can handle 90 RMS apiece. My curiosity is that of the fact that if I could add in more current - sending 75 watts RMS to each speaker. As in my old car, I was moderately unhappy with the rear fill off of 55 apiece (didn't have the front speakers then - haven't tested them off the power yet). As I had tried them on the amp bridged, and knew they had the output and could handle more power, and sounded much better when they had as much or more power than they were rated to handle.

Now, I don't believe this is possible, but I was curious. Whether wiring both amps to a speaker, or taking the + wires from each amp, putting them together, and putting it on the speaker, then running the - wires together, splitting them into each amplifier. However, looking at it theoretically, the smaller amplifier would have much more returning current, and the larger one less. Probably wouldn't damage the larger one, but the smaller one probably wouldn't like it.

I'll go read up on strapping, thanks.

When someone mentioned strapping your amps, I am sure they thought you meant subs. When they asked about the voice coil I know they were thinking subs too. I don't think what you are trying to do can be done.

You want to run both the factory amp and the aftermarket amp together to give the speakers more power. Just get a Kicker 650.4 and call it a day.

 

[Plutoman 10+ year member]

When someone mentioned strapping your amps, I am sure they thought you meant subs. When they asked about the voice coil I know they were thinking subs too. I don't think what you are trying to do can be done.
You want to run both the factory amp and the aftermarket amp together to give the speakers more power. Just get a Kicker 650.4 and call it a day.

Ha. Money is the factor. Reason why I'm using a hifonics amplifier atm, too.

first of all, the difference between 55w and 75w is very slight, but the difference between 20w ant 50w is significant (just use the amp).
second - the amps would see each other as a load and try to deliver current into the outputs of the other. If that's not enough to damage one or both amps (it probably would be)...

They would likely not produce the exact same signal and would have the sub working against itself. Best case scenario - it would sound terrible.

That's what I figured and was wondering - wanted a bit of confirmation. Thanks ^_^ Probably just live without it. Should be fine volume wise, though, after thinking on it - I was dissatisfied with the volume, but that was only with rear fill - with a front stage and rear fill, I should get the volume I want pretty easily.