1.800.555.8260 We're here to help
As a registered member, you’ll be able to:
When I turn the volume up to a certain point (12 of 30 volume), the amp will begin to turn my sub & speakers on and off. I checked all of my connections and they seem fine. I double checked my ground point and its good as well.
pioneer AVIC z120bt
Pioneer Amp gm-d9500f
Pioneer TSSWX251 10" sub (200w RMS)
Polk Audio DB651S (55w RMS )
What should I do?
Chowee21I have my amp mounted on the underside of the rear deck, is it possible that this is causing it to shut off? It will shut off even the the unit is cold so I don't think its over heating.
Chowee21I had my volume at 3/4 & I was adjusting the gain on the sub (with the front channels unplugged) and it still was shutting off even if I turn the gain up a little.
Since you know the other side of the amp isn't causing the shut-down, you may want to try bridging your sub to the front channels and see if it's the rear channels that are messing up.
Chowee21I also took some jumper cables and ran them from the battery to the piece of metal that I had the amp grounded to and it still did it.
kratebikerInstall the amp properly, not upside down.
While not totally recommended - there are ways to make this work also - get some long bolts and spacers and hang the amp right-side up from the rear deck with an inch or so of air space above it.
This way the cooling fins on the amp still work and you still have the floor of the trunk available with the amp semi-hidden.
Hope This Helps!!!
Anyone else have suggestions?
2002 Ford Focus JVC KD-A815 Sony CDX-GT410u Sony XT-100HD HD Tuner Stock speakers, no amp, no subs
First and foremost, make sure you are using a large enough positive wire connected directly to the battery. If the ground point is as good as you said, then do the following:
1. Fire up the amplifier to a level that makes it shut off. Then, very carefully touch the top of the amplifier (don't burn your hand!). If the top of the amplifier housing is very hot to the touch, you may want to try a different location for the amplifier with better ventillation, which should solve the problem.
2. I would also try other ground locations and make sure that is not the problem. The way you are describing the problem....it is either due to overheating or the ground location may not be suitable. Both can cause an amplifer to act up as you describe.
I was on a recent road trip over the Easter holiday, and after two hours of continual listening at mid to very high volumes, my four-channel amp shut down. I checked the top and it was extremely hot. I have excellent ventilation around the amplifier (three feet of air space), so I simply let it cool down for a few minutes and was enjoying solid music for over four more hours of driving.
If none of these solutions work, there may be a problem with the amplifiers overheat protection circuitry. Good luck!
"Just a world that we all must share. It's not enough just to stand and stare..." Pink Floyd On the Turning Away
Chowee21When I turn the volume up to a certain point (12 of 30 volume), the amp will begin to turn my sub & speakers on and off.
Less likely, but it can also be due to your remote turn-on lead. If your power and ground check out, keep it playing and touch the probes to the ground and REM inputs on the amp. Again, it should stay above 12 volts.
If no voltage drop is found, you need to check the impedance of each individual speaker connected. Power off the system. Disconnect the speaker wires from the amp and set the DMM to the lowest impedance setting (usually 200 ohms). Probe each speaker's Pos and Neg lines and you should get a reading of approximately 4 ohms for all 5 speakers in your system. If you find one that is suspiciously low or high, disconnect it and try playing the amp with the other 4 speakers playing. If it doesn't shut down, the disconnected speaker or the wire going to it has a problem.
Not extremely petinent, but are there four Polk speakers and one Pioneer sub, or only two Polk speakers (on the amp front channels) and a Pioneer sub on the bridged amp rear channels?)
only two Polk speakers (on the amp front channels) and a Pioneer sub on the bridged amp rear channels
I checked the voltage in and they both are reading between 11.5-12.2 volts.
Chowee21I checked the voltage in and they both are reading between 11.5-12.2 volts.
If your saying the battery is over 12 and the amp is dipping down to 11.5, you've got a serious kink in your power chain.
The Power to the Amp was reading at over 12 and the remote was reading below 12. Sorry I didn't clarify that
No problem. The MECP guideline for acceptable voltage drop is no more than 0.5 volts, so i almost shouted BiNGO when i saw 11.5-12.2. Not totally sure you did the procedure right, cuz 11.5 is pretty low. What about with the engine running? Can you get the amp to turn off then as well?
The next step in fault isolation would be checking speaker impedance.
Okay, sorry to get your hopes up, but here is what I just got for readings:
Car on ACC:
Remote Voltage: 11.2-11.3
Speaker Ohm: ~3.8 ohms for both
I did adjust my gains & freq and that has helped to.
If those are your voltage readings at a volume just before the amp shuts down, than voltage drop is not the issue. Your power and ground are very strong to get 13.8 at the amp!
Chowee21Speaker Ohm: ~3.8 ohms for both
Chowee21I did adjust my gains & freq and that has helped to.
If adjusting the gain is the only thing that's getting you somewhere, let's get it dialed in just right. Try the DMM method for setting the gain. I've typed up this method several times so here's a link to one of them or you can do a search for "DMM gain setting". The target for 200 watts at 4 ohms is 28.3 volts AC.
I have my amp mounted on the underside of the rear deck, is it possible that this is causing it to shut off? It will shut off even the the unit is cold so I don't think its over heating.
I had my volume at 3/4 & I was adjusting the gain on the sub (with the front channels unplugged) and it still was shutting off even if I turn the gain up a little.
I also took some jumper cables and ran them from the battery to the piece of metal that I had the amp grounded to and it still did it.
All of my voltages are hitting over 13.
J RoDid you measure the sub? If the sub isn't 4 ohms (or close enough to it) it will shut your amp down over and over.
Aw ha! The sub SAYS it is at 4 ohms on the specs, BUT the sub itself is producing about 2.5-2.8 ohms. What should I do about this?
I actually TODAY am getting rid of the TS-SWX251 and installing a Polk Audio DB1040 sub.
J RoMounting amps upside down is a BAD idea. Heat rises, right? Instead of
the heat going up to the heatsink, its lingering in the circuit board.
The amp may feel cold only because heat is not being transferred out of
it. If you've had it that way for a while, you might have damaged the
I haven't had it this way long at all, maybe a week or two. What if I install cooling fans on either side of it?
By the way, Thanks J RO, I know a lot of my questions are fairly fundamental, so thanks for bearing with me and not criticizing for my stupidity!
Chowee21the sub itself is producing about 2.5-2.8 ohms. What should I do about this?
Chowee21I actually TODAY am getting rid of the TS-SWX251 and installing a Polk Audio DB1040 sub.
Chowee21What if I install cooling fans on either side of it?
Install the amp properly, not upside down. I suggested earlier that the amplifier may be overheating, causing the shutdown. Mounting an amp upside down will cause this. Do an experiment. Remove the amp from its current position, make sure its oriented right-side-up and fire it up again. Hopefully that will solve the problem. Then just make sure it has adequate ventillation wherever you install it. Good luck!
Because my name is on the business, I work hard to make sure you get the best possible shopping experience. I look forward to hearing your comments .
- Bill Crutchfield Founder and CEO
Browse our latest Discovery Book catalog online
Send me a FREE Discovery Book catalog by mail
Email me exclusive offers, deals and expert reviews
Copyright ©1996-2014, Crutchfield New Media, LLC All rights reserved. Crutchfield is a trademark of Crutchfield New Media, LLC.