20 Most Recent Sony XM-2002GTR Car Audio Amplifier Questions & Answers


The issue is with the turn on circuit of the sub woofer.

Sony XM-2002GTR... | Answered on Aug 25, 2017


Does it go into protect in the vehicle if you disconnect the speaker wires from the speaker terminals of the amp?


Sony XM-2002GTR... | Answered on Dec 20, 2014


Hi, Off hand, I believe there is nothing wrong with the setup, maybe just not 100% compatible. It's just that the Sony Amp's protection is doing its job (just too good) and the stock radio is likewise doing it's job (but not too good). Just maybe, at poweron, the stock radio sends out a small burst output (maybe capacitor discharge) that we normally hear as a slight thump in the speakers which was when no Sony amp, ok. However, when you have added the amp, you also amplified the thump, which unfortunately the Sony protection reacts to. You can off course let it be since you have figured out a way to make it work or you can try and install a delay on for the power amp or separate it's power on from the stock stereo. The idea is to turn on the stereo with the Sony off and after a second or less, a manual switch or a delay activated switch will turn on the Sony. The idea is to switch on the Sony after the thump has finished. Good luck and hopes this gives you an idea. Pls post back how things turn up. Kind regards.

Sony XM-2002GTR... | Answered on Feb 09, 2014


sounds like a loose ground, or a loose positive cable or possibly a blow inline fuse, and the only power your unit is getting is from the remote. triple check all your connections. use your senses, smell the amp, smell for a burned order, this usually identifies if it is something internal. but it sounds like in your case (from experience with) a bad ground. If your gound or positive is connected but not tight it may be enough to power the remote circut, but not good enough to handle the actual turn on (Click) of the circut. powering the led light usually takes about .5 amps, but powering the turn on switch usually takes anywhere from .5 to 20 amps, then the inital charging of the capacitors that are internal on every amplifier... that quick charge pulls a decent amount of curren fast (usually the first 2-3 seconds) to fully charge a small amplifer after it has clicked on. hopes this helps

Sony XM-2002GTR... | Answered on Aug 08, 2010


The amp should produce no output when using the left negative and the right positive.

If the amp works bridged (left positive and right negative) with one speaker AND works when you connect one speaker from the left positive to the right positive, it would appear as though the right channel isn't getting any signal.

Try inserting only the left signal cable (nothing plugged into the right RCA jack) to see if the right channel will work when a speaker is connected to the right channel speaker terminals.

Sony XM-2002GTR... | Answered on Mar 22, 2010


that amp is only stable 2 about 4 omhs mono the powersupply shut dowm drawing t much current it supposed 2 2 fix this u need a 4omh load mono change speaker config so u get 4 omh or buy amp stable down 2 1omh can be expensive

Sony XM-2002GTR... | Answered on Aug 29, 2009


Very likely the amp is overloaded and goes into protective thermal shutdown. Letting it cool off for a little while would allow it to reset. could be it's not capable of sustained power level you like. Next most likely reason is miswiring speakers - if you have more than one and they are in parallel (the usual case, with all the red+ terminals wired together and all of the black- terminals wired together), check to see that their total impedance is no less than the minimum specified in the amp's manual. The total impedance is Z=1/(1/Z1)+(1/Z2)+(1/Z3)... where Z1 is the impedance of the first speaker, Z2 the second, etc. For example, two 4 ohm speakers in parallel = 2 ohms.

Sony XM-2002GTR... | Answered on Jun 26, 2009


Hello adeisenroth,

Sounds like the voice coil(s).

First make sure that the braided wiring going from the sub cone to the voice coil(s) have not come loose. Examine the braided wire all the way from the terminal to the cone. If one or more has come loose, it can sometimes be resoldered. Just be careful with the heat.

If all the wiring is intact, you can check the coils with a multimeter. With the sub disconnected, and the meter set to the lowest resistance scale, test across the speaker terminals. Depending on how the coils are wired you should measeure somewhere between 1 and 4 ohms. If you get "0" or no reading at all, one of the coils is open. If you get "infinity", a coil is shorted. Sometimes only one coil is bad and you can still use the sub, wiring it to the remaining coil only. Once you have determined that one set of coils is either open or short, you can remove the jumper and test each coil individually.

You can test most any speaker voice coil with a small battery. The best to use is the 9V type that has terminals right together. Connect a short piece of speaker wire to the sub terminals, and hold the other end of the "+" wire to the positive battery terminal, then quickly touch and remove the negative battery terminal with the "-" wire. The sub cone should move outward, and you should hear a brief thump. If no cone movement, and no thump, the coil is defective. Do not hold DC to a speaker for any period of time though, just touch and remove. And NEVER use a high-current battery, like a car battery for such a test. If the coil is not already bad, high DC current will damage it.

Either short or open, replacing a voice coil is a job for the Rockford-Fosgate professionals.

Sony XM-2002GTR... | Answered on Apr 18, 2009


There should be 3 wires running to the amp. +12v, ground and remote. ensure the remote is connect to the remote of the player or preamp. if the remote aint connected there will be no power on the amp.. if yor radio or player dont have a remote wire, connect the remote wire directly to the battery +12 to test it. If it powers on, then you can run the wire to a spst switch somewhere in the car and from the switch to the amp.

Check the fuese on the amp..


Sony XM-2002GTR... | Answered on Apr 02, 2009


try 1 speaker at a time could be blown speaker also try different rcas and inspect positive cable make sure its not grounding out near firewall or pinched somewhere else

Sony XM-2002GTR... | Answered on Mar 31, 2009


was it two screws or two controlls.

Sony XM-2002GTR... | Answered on Mar 18, 2009


Some older Pioneer radios require you to connect the Subwoofer RCA to the rear output on the back of the radio and then you have to turn on the subwoofer in the menu on the radio. What model Pioneer radio is it? Also, make sure that the RCA plugged into the amp is on the input side, not the output side.

Sony XM-2002GTR... | Answered on Feb 05, 2009


The amp is staying on with the car off because the amp turn on lead (remote) is being powered to 12v constant and not 12v switched (from the radio or ignition). CD's not changing could indicate a problem with a defective head-unit.

Sony XM-2002GTR... | Answered on Aug 10, 2008


solidus- Your amp is going into protection mode, try disconnecting the sub and see if the power will stay on then.If yhe power stays on,it is your sub-blown or shorted ect. But if it does the same as before,its to the repair shop. cooltek Mar,4/08

Sony XM-2002GTR... | Answered on Aug 06, 2008


Check the wiring between the sub and the amplifier. That's seems to be the only thing left that could cause a problem. If it's shorted to ground or pinched so the conductors are shorted together, it could cause the symptoms you listed.

Sony XM-2002GTR... | Answered on Feb 23, 2008


You cannot parallel two subs AND run them on the Bridge. You must have at LEAST a 4 ohm load on the bridge, and 2 4 ohm subs in parallel equals TWO OHMS. BAD!!! Move each sub to it's own channel or your amp will soon fry.

Sony XM-2002GTR... | Answered on Sep 15, 2007


Hi again, Looks like you posted twice, in any case pls have a look at your other post @ http://www.fixya.com/support/t182326-amp_protection

Sony XM-2002GTR... | Answered on Aug 24, 2007

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