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[Briman42487]

hakim100 previously said:

OK this is what I've had since last year...

Pioneer AVH-P6800
Fosgate punch 500 amp for sub
Fosgate punch 12" P2 in Q-logic box
Fosgate p450.4 4 channel amp
Components in the front, infiniti 3" in the rear

I've had noise since all that was put in, I went back and forth to circuit city 5 times, they made sure there was no ground loops, they moved the amp around, changed the grounds, re-ran the power wires farther from the RCA's...I sent the amp back and crutchfield sent me a brand new one, STILL NOISE...finally circuit city put RCA filters on, and it helped but I still had noise and just got used to it...

Recently I replaced the AVH-p6800 wit a Kenwood DNX 8120, and the Q logic box with the wicked cas box. I had the best local shop re-wire the 4 channel amp, they did a quality job (they work one imports, luxery cars, and do alot of custom work)...after two seperate times of trouble shooting there was still noise...I checked everything my self and the power wires are run separately, the ground is short, the noise filters are still on the RCA's (they even put on newer higher quality ones)...and there IS STILL NOISE... Finally they tinkered with the amp, and connected it to a single test speaker, and THERE WAS NOISE...so the shop is basically saying its my amp, which has already been replaced once...the last thing they did that helped a lil bit leave the amp unmounted, its just resting on the plastic under my passenger seat

Basically they said fosgate's sometimes make alot of noise...

My question is, what brand or maybe what model is notorious for good noise reduction...I need atleast 65 watts x 4 RMS at 4ohm (would like more)...and I don't want to spend more than 500...

I've read the JL A4300 is really good at noise reduction, but its really weak on power...

Also, alot of people have told me 4 channel amps are notorious for producing noise in big block V6's and V8's...is that true?

Any help would be good, and don't flame me if this has been posted before, i did the best searching i could, and found alot of trouble shooting on fixing noise, but nothing on the best amp for keeping noise low...

OH almost forgot, the noise is a soft buzz, with a whine in the background that gets higher pitched with RPM's

that is alternator noise and is due to a faulty install. you could have a v12 for all i care, no vehicle will make more noise than another.

as far as amps go, find one in your budget.

there are good installers everywhere, but i have seen some shady stuff walk out of big box stores. the most common thing that i check for if engine/alternator whine is present is a bad ground. i fixed one the other day in this kids F150. circuit installed the ground under a seat box. they also removed the 40 section of the 60/40 rear seat to install the generic box. and they installed the amps with two screws under the front seats instead of throwing them on the rear wall like they should be. and all of this should have been ran from 1/0 or two 4 gauges, instead a single 8 gauge from the battery, split by a butt connector into two 10 gauge runs to the amps. did i mention that the wrong size ring terminal was used and it wouldnt fit over the stud, so they cut it in half and tightened the nut down and sandwiched the 1/3 of the ring terminal left.