Help with my audio system please.

1844 Views 17 Replies 6 Participants Last post by mexi, Dec 3, 2005

bLaCk IcE

Discussion Starter · Dec 2, 2005

OK this is the deal I have a 300 touring. I am running a pionner 4channel amp for my mids and highs, and a 2 channel punch500 to two 12's punch p2s(8ohm speakers-bridged down to 4ohm). The problem is my punch amp just cuts off. I think its just lack of power going to the amp. Also, after that cuts off, i can hear my mids and highs seem to lower in volume slowly. I would have to raise the volume higher that usual. Dash lights do dim alot. I have 4 gauge cable split to two 8 gauge cables using a distribution block to the amps. What do you experts think I should do? Would getting a farad capacitor do the job with what I have? Or would I have to get an optima battery as my 2nd battery. Or even more costly, will i have to upgrade my alternator and get either or a farad cap or battery. I thought this car would handle this extra stuff better than I experienced, cuz I had bigger systems in my old lil honda civic that handle this needed power better. I searched the audio forum here to decide, but didnt find an answer for my case. If any1 has suggestions, please feel free to help me out.

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el_duderino

· #15 · Dec 2, 2005

Tw 8 ohm VCs are indeed a 4 ohm load.

A bridged amp "sees", per channel, 1/2 the load you show the bridged pair.

1/2 of 4 is 2.

The amp is "seeing" 2 ohms per channel.

The amp is 2 ohm stable per channel. However, at 2 ohms per channel it will draw more current and will require more current capability through its power and ground wires. If these wires are not large enough, the voltage will drop (Ohm's law) and then at some point the amp will shut off.

So if it's shutting off, it's probably a voltage drop thing. Put a voltmeter across the power and ground terminals and watch the voltage when the map shuts off.

There are other possibilities... but none should be examined until this one is verified.

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