I hooked up an amp and sub as they should be. it was working perfectly for a week. then i start up the car one day and the sub is very quiet, even with all power to the amp and sub turned up to full volume, hardly any base can be heard. even playing around with the gain and built-in-cross-over on the amp didnt help. whats so wierd is how nothing has changed since it was working to when it wasnt, just suddenly quieter. any help would be appreciated. cheers
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make sure you have seperate power and gound seperate remote wires and if it does have a pass through then use it but i would hook up one at a time make sure they both work if after all this and it dont then your deck may not have enough power coming out of it to power the rca's or use y adapters from the cd player and run 2 sets of rca's.
lets do some diagnosis.. if it's possible, try hooking another known good sub up to the amp and see if that works. if it doesnt, it's an issue with your amp. if it does work though, it's an issue with your sub. or the wiring. if it's a dual voice coil sub, make sure you've got both positives hooked up to positive from the amp, and both negatives hooked up to negative from the amp. if you've accidently got positive from the amp going to positive of one voice coil then to the negative of the other, and the negative from the amp going to the negative of one voice coil then to the positive of the other, the voice coils will be pushing against eachother cancelling eachother's movements out. and this will fry the sub. OR the sub is already fried.
it sounds like you have the polarity of the speakers hooked up wrong on one of them, try unhooking the new speakers you added and hook them back up one by one, when the music gets fuzzy then reverse the wires for that speaker, this should cure your problem.
If the sub isn't working, you won't get a pop. All you need is a small speaker. Don't need a sub, you just want to test the sound. I recently blew 2 subs, no smoke, no smell, no sign of being blown. Absolutely nothing from the subs.... In the past my sub locked up. You can take your sub out of the box and hook the + and - to the battery to see if you can get the sub to pop there. I believe a small box will push a sub into a deep excursion to the center of the cone. I have 2 lanzar VW12D's that just quit. I hooked a 6 x 9 up to my amp and low and behold I had sound! Try that and see what you get...
it might not be the amp that is not working it could be the sub or sub's. Try takeing a sub out of the box and look down the hole in the center of the magnet on the back of the sub and look and see if you can see any wire's or any thing that has come unwound in the sub and if you do see wire's then you have blown your sub. If you dont see any wires then you could completly disconect your amp for 20 to 25 minutes and then plug it back in and see if that fix's your problem. If none of this works then you can take your amp to an audio store and have them test the circut board in your amp.
Im sorry to have to inform you my friend, if you saw smoke, you burned one or more of the resistors or output devices inside the amp. Without a service manual, it will be a hard call on what exactly cooked. In alot of cases please forgive me for saying so, but the ampis not worth taking into a repair shop to be repaired, because of the high cost these days of labor. Its too bad there are no user replacable parts inside of these amps. Good Luck.
Ps Please do not forget to rate this thread?