Question about Sony Xplod XM-1652Z Car Audio Amplifier

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Loud hum When the power is turned off,loud humming noise out of base speakers

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You might have your gain level too high or frequencies

Posted on Mar 08, 2008

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I just hooked up my RF 325.1 Amp to my Sony CDX-M30 deck and a small 10" Alpine Sub in a small box. I ran the wiring according to the install instructions for the Amp, but I am getting a very loud...


the reason for the 3' min. on your ground cable is that interference is picked up with longer gound cables. Especially if it passes close to any electrical components, e.g. spark plugs, capacitors, anything with electrical current. These signals are amplified within the amp. (because this is what amps do) and distributed to your speakers. you could try a noise filter / noise suppressor but I've never had luck with those. You could also try finding a metal part of the frame (if there are any) and attach your ground to a bolt along that frame and if your more advanced you could create a hole and use a screw to tighten the ground to the frame. Small note to that, boats create a lot of vibration so use a ground screw with a sort of tooth like seration at the head that grips as it tightens (so it won't come lose). If you have an extra battery you may want to attach the amp directly to an independant power source to see if your getting the same hum. A direct short in your electrical system will create the same sounds. A bad ground your electrical system will do this also. You may also want to check you high and low band pass frequencies if applicable. Set them to high and you'll get a hum. I would start there adjusting them down or setting them to the center and adjust accordingly if this stops the hum. I'm running 4200 watts all together and if I adjust to high I get interference just from the force of the amp itself. Good luck. Hate electrical problems on vehicles, too many wires.

May 25, 2011 | Rockford Fosgate Punch P325.1 Car Audio...

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I have a set of subwoofers in my car powered by an amp with capacitor all 3 years old. A couple weeks ago I encountered a problem where my system will suddenly emit a weird loud humming noise (similar to...


try taking out the capacitor and wire the amp up with out it. it sounds like the cap is back feeding or discharging voltage when it should not be . if you reinstall the amp with out the cap and noise goes away buy a new cap or do away with it .

Oct 29, 2010 | Rockford Fosgate T600-2 Car Audio...

1 Answer

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Sounds like your RCA's are near your power & ground wires. I would run your RCA''s on the other side or as far away from the power wire as possibly. Sounds like your getting the infamous alternator whine. If none of the above work you can get a in line noise filter to filter out that noise. RCA's can pick up noise when their around anything that has alot of current running through it....Hope this helps

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1 Answer

500X emitting feedback squeaking


One source of hum is from bad rectifiers in the car alternator, if this problem stops when key is turned to accessory then have your alternator checked for bad rectifiers.Good luck and please don't forget to rate.

Apr 09, 2009 | Rockford Fosgate Punch 500X Car Audio...

1 Answer

Low ohm light comes on and loud humming sound comes from amp and sub have a j1000 and 13 w7


nice set up, how many speakers are you running? you have something wired up weird causing the ohm level to drop to low. we can fix this let me know and ill help you.

Mar 07, 2009 | Jl Audio 1000/1 Car Audio Amplifier

1 Answer

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stereo wireing problem!

Feb 24, 2009 | Car Audio & Video

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Dls 12v amp


Were you testing it in the vehicle?

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You need to use a multimeter to see if the remote turn-on voltage at the amplifier is dropping to near 0v as soon as you switch off the head unit. If it's not, you need to determine why it's not switching off quickly.

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1 Answer

PEAVEY GUITAR AMP RENOWM 400


What type of noise is it making? If it sounds like a load hum, you may have a 60 cycle hum issue. This is caused by a capacitor not filtering out the 60 cycle ripple on the DC voltage supplied by the power supply. If you have this problem I would suggest measuring the power supply with a DC voltmeter first and writing this measurement down. Then I would suggest you plugging the amp into an isolation transformer and taking an oscilloscope (plugged into the wall)and measuring the DC voltage while the oscilloscope is set to AC if you see an AC ripple voltage higher then .1mv you have a bad filter capacitor or a bad voltage regulator.

Sep 08, 2007 | Peavey AMPLIFIER, 1000 WPC, DDT, 8/4/2...

1 Answer

Amp turns on then starts making subs go erratic with almost sounds like line nosie


hi i had the same problem people suggest checking ground thats where you start at then if it aint ground for sure, the make sure you have good rca cables. If there good this is what happen to me i had a cheap ole pioneer 70 doller cd player the actual rc jacks from that cd player was making and horrible sound travel through my speakers im talking humming whinning everything im positive that this will solve your problem email me at maggotman927@hotmail.com and let me no something if i helped or if ya need more help

Apr 04, 2007 | Kenwood KAC-9152D Car Audio Amplifier

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