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Apr 24, 2013 - Uploaded by Nathan West
My MTX 600xd amp light won't even come on. ... Red light comes on. ... one.. and some times it goes into protection... once I turn the car off...
check the impedance load or try a different ground. when you hook your ground up always make sure you sand the metal down before you connect to ensure a good and clean connection.as for the impedance, make sure your subs are wired to the right ohms. for example, if your subs are wired to 2 ohms or even 1ohm, and your amp is only 4 ohms, then it will do exactly what your saying it does.
Have you tried powering on without speakers connected? Have you tried powering on with no input? If either senerio causes the amp to NOT go into protection mode, then there is most likely a short in wiring. Use a multi meter to isolate.
hey i had this happen to me, pull the deck out and move the rca cables to a different channel and see if that does not fix it. i blew out my sub pre out channel in my deck and had to use the rear pre outs. try this and let me know what you come up with. good luck
Maybe a protection component cutting in. If you have speakers that are too powerful for the radio it may shut down to protect the amplifier from overdriving the speakers. That produces too much heat in the amp chips/transistors and they either have a overload cut out protection circuit or they burn out. Even if the speakers are the stock fitted ones the wattage could be bigger than the amp in the radio can handle. There's probably no way of knowing how powerful the speakers in the truck are but you could try the radio with another set. Max 50 Watts for that radio. If you don't have the manual for it, it's available here: http://www.kenwoodusa.com/Support/Car_Entertainment_Owners_Manuals/#_
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.