Question about Sony CDX-M850MP CD Player

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I hooked up my Amp to my sub out on my stereo, the amp turns on but I get nothing out of my subs. I know they are not blown because i already tested them . help please any suggestions?

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Are you saying you connected the sony output jacks to your subs directly without any other amp? Are the sub outputs powered? Or line level? Are the subs powered or direct? need some more info please. and post the Manual here if you can. Thanks

Posted on Jun 14, 2006

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My amp is on but the subs don't work Kenwood amp


Ok. Simple test to check if your subs are blown. Hook up speaker wire and simply touch each wire to each end of a new aa battery. You should hear like a sizzling static sound from the sub and it should jump slightly if its good. If subs are good you may be having issues with the connection terminals or worse. And it could simply be the audio connection from the stereo or the audio wires need replaced. Possibly replace the stereo or amp. So many more options but this should get you headed in the right direction.

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The main problem I have having is I am getting power to my AMP but no power to the subs. I tested my AMP and subs in another car and everything worked so I know my hardware all works fine. I had someome...


okay , well you need to make sure all your conections are in the right spots, and that your IN LINE FUSE, between your amp and battery, the big glass one is not burnt, just take a look at the metal piece inside , if its a sold metal piece its good, if its burnt in half like a broken bridge it needs to be replaced. the next thing is the fuse on your amp, you need to make sure it is not burnt also. Check your remote that it is hooked up to the right wire. then check that your sub/speaker wires are connected properly and secure. YOUR GROUND WIRE IS HUGE HERE also. MAKE SURE IT IS GROUNDED TO A GOOD SPOT, YOU MAY HAVE TO MOVE IT AROUND A FEW TIMES TO FIND A GOOD GROUND!!!! if you check all of these things, it should work fine.. you can fiddle with your amp and bass settings levels. turn em up so when it works you know it, but not too much you dont wanna blow nothing :)

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your amp cant handle the impedance of your subs i.e your running a 2ohm sub on a 4ohm amp!

Change the wiring on the sub so instead of running at 2ohm your run at 4

if you need to know how to wire up your sub to run at 4 then take a look at this wiring diagram

take a look at option 2

Click here

Hope this helps if so please dont forget to rate :)

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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...

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Are you certain you put the wires back on the amp the exact way they came off. I am not familiar with this amp but most amps if you look at the terminals where the speakers hook up there will be a plus and a minus. And generally there are four terminals. hence stereo plus and minus left and right. Some even have eight for, four channels. Since the amp is on, not getting hot and you tried two different audio inputs I would suspect speaker wiring or maybe the stuff you put in your trunk bumped a switch on the amplifier. I know this is not the exact answer you are probaly looking for but it is at least a place to start

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