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Speakers popping and static noise at all volume levels PPI Amp
Speakers popping and static noise at all volume levels PPI Amp
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Old 26th April 2009, 07:10 AM   #11
pcaioo is offline pcaioo  Hong Kong
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Hi Mike

did you solve your problem ?

Paul
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Old 26th April 2009, 07:10 AM   #12
duderino201 is offline duderino201  United States
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I have not yet solved this problem, I usually just turn it up until the music covers up the noise. It's getting worse now that it's summer though, it seems to get worse with heat.

I think sometime in the future I will take it apart and do some messing around with it, I'll post back here if I end up finding a solution. It may be a few weeks though before I get around to it. It all depends on how annoyed I get with the noise.
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Old 26th April 2009, 07:44 AM   #13
chris661 is offline chris661  United Kingdom
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The amp making the popping noises would be classed as normal for me.

I use an old McGregor in my room, and that (from what I can tell) empties it's capacitors into the speaker when it's switched off.

But when I switch it off, it comes out more of a thud, except with smaller drivers (must depend on resonance).

When the amp is just sat there, switched on, does it get really hot???

Could it be possible, that you've blown the amp?
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Old 26th April 2009, 02:49 PM   #14
duderino201 is offline duderino201  United States
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It doesn't get hot or anything while it's on and the fan on the inside still seems to work as well. I'm sure there are just some messed up electronic part(s) on the inside. I'll see when I actually get the thing on my desk and take the time to really go through it.
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Old 28th April 2009, 01:49 PM   #15
pcaioo is offline pcaioo  Hong Kong
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have to try to adjust the gain in difference level see if it change the noise ? to verify is a pre amp problem or main amp problem ?
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Old 29th April 2009, 04:02 PM   #16
team_innovative is offline team_innovative  United States
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I think I might be able to help with this problem. But first there are a few things that I need to know. How many amps are you running? What size fuse does each amp your running have in it? Are you using a single or multi cap set up? If your not using any caps, are you using a multi battery set up? What gauge power wire are you using? How far away from the engine battery is your inline fuse? And last, what size inline fuse are you using?

Sorry about all the questions. But in order for me to assist you, I really need to have an understanding of what I'm working with. I had this same problem with a 96' Camero that I designed and built for SPL competition. It took me about six or seven days to go through the whole system and trouble shoot it.

So get back to me with the answers for all those questions and I'll see what I can do.
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Old 11th May 2009, 05:22 PM   #17
duderino201 is offline duderino201  United States
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Default A delayed response...

Sorry it took me a while to post this, but here is some more information on my setup.

I am running two amps. a PCX-4125 and PCX-1500. Each one is rated 1000 Watts RMS @ 12V (with a 2 ohm load), which technically gives you around 83 amps draw per amplifier. I am running the 4 channel with 4 ohm loads, and the mono with a 2 ohm load so that brings me to about 125A draw. I have 1/0 wire running from the battery (main car batter) to the trunk, where it hits a 3 or 4 farad capacitor (I can't remember exactly) then it hits a terminal block where goes to 4 gauge wire to each amplifier (I am pretty sure, but would have to double check the wire, I installed it a year or 2 ago). I have an inline circuit breaker rated at 150A about a foot from the battery.

I cannot remember what fuses are in the amps right now, I would have to double check that and get back to you, they are whatever I got with the amps.

The speaker wire is I think 14AWG, and the RCAs were the expensive ones, ZN6 or ZN9 from streetwires... I can't remember.
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Old 4th June 2009, 01:46 PM   #18
team_innovative is offline team_innovative  United States
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This time its me who's sorry for taking so long to reply. I've been pretty busy lately. Anyways, the first issue I want to discuss is the terminal block that you spoke of. I'm not sure if you are talking about a standard power distrubution block or a multi fused distrubution block. Either way, the one you will be needing to have installed is the fused distrubution block. If you are running 4 gauge out of the block and into each amplifier. I would suggest you use fuses rated between 20 and 25 amps(I) above each amplifiers original/stock fuse rating.

Also you will need to have a standard ground distrubution block. Make sure you use the same gauge wire for all grounds that you are using for power. The main ground should be from the vehicle chassis to the input side of the ground block. Then a second ground wire will connect the secondary power supplies ground terminal to the input side of the ground block.

Next I would reccommend increasing the 150 amp(I) breaker you have installed to one that has anywhere from a min rating of 180 amps(I) a max rating of 250 amps(I). Also installing a high current (250 amp(I) max rated) ignition relay between the engine battery and the breaker is somthing I also reccommend doing.
This will reasure that the vehicles start up battery will remain isolated from any power drain connected to the secondary power source, inless power has been given to the vehicles ignition.

Try all of the things I just explained if they are not already present in the system. I'm almost positive it will cure the problem you've been having. If you try all that I have suggested and the problem persists, the next step will be to trouble shoot the amplifiers and headunit. This will determine if the problem is being caused from the power side or the sound side. Let me know how it goes and we can go from there.
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Old 31st January 2010, 08:23 AM   #19
duderino201 is offline duderino201  United States
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Default Working on this amp again...

Hey guys, I know I posted about this last year sometime, but I've finally gotten so annoyed that I've taken this amp out of the car and have it in pieces on my desk... I've also noticed there have been a few hits on this post so I'm sure some other people have had similar problems...

I've tested the amp with different input, cables, speakers, and wires and it still has the same problems as it had in the car. I know the problem is related to the amp itself now, not anything in the car. Now that I've had plenty of time to be annoyed by the issues I can maybe explain them a little better...

The noise is completely random, sometimes it's quiet and in a rear channel, sometimes it's really loud and present over the music in a front channel, once this started the amp also started popping when I shut it off. This never happened before. The noise will sometmies be a faint maybe 20 Hz clicking, and sometimes a quite loud maybe 60 Hz buzzing...

Does anyone know where to look to solve a problem with these symptoms inside the amp? I am quite handy with a soldering iron and I am an electrical engineer, so I'm not afraid to dig in.... I just don't have any amplifier experience under my belt so I need to know where to look, and what components to start with. I really wish I could get my hands on some schematics...

Thanks again for any help you can provide.
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Old 31st January 2010, 08:28 AM   #20
Perry Babin is offline Perry Babin  United States
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PPI has been sold to a group that generally provides schematics for their amps. Contact the tech support guys to see if they can help.
tech-support@precisionpower.com
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