Amp powers up (switchable) but has absolutely no output
Just currently bought this amp used, was told "works" but upon recieving it, it obviously doesn't.
Amp powers up best I can tell, light comes on strong and steady, cooling fan turns fast.....yet no output.
Have tried 2 different signal sources and still nothing. RCA feed lines are new and functional.....sub cabinet is new and functional.
Have Kenwood KDC 10-22 reciever/cd , doesn't seem to have RCA output as well. Any suggestions?
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Re: Amp powers up (switchable) but has absolutely no...
Hey cursedknight, I know this is an old post but let me know if you
got your KAC-7202 amp fixed cause I can help you. I have the same amp with some output transistor problems or power supply transistor problems. You can remove the bad transistors that are reading bad and power up the amp and it will work, not all amps will but some. I have an Insignia amp I am workin on and found one bad power mosfet transistor there are 3 per side. I took all 3
on the side that I found the bad one on and powered it up and it worked, but with half the power. Try doing that, if you find one bad
take tall them out on the side you found the bad one on and put power to it. Same thing goes for output transistors. Go to youtube
and type in car amp repair and there are 9 videos of a guy showing you some really good repair tips and also go to www.bcae1.com this guy has all the info and a dvd rom you can buy. On his site there is alot that will help. Good luck
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It sounds like a defective/incorrect AC-to-DC adapter may have caused your problem. These adapter come with different output voltages, AC or DC output and different amperage ratings. AC-to-DC adapters list the polarity of the DC voltage as it relates to the DC power plug and you must match both the devices voltage and power requirements. As for the amp...not working on batteries either, I would suspect output transistors or IC.
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Hi there, try the following; disconnect your remote lead, connect the remote terminal to the positive terminal with a piece of wire. If the amp powers up then the remote output from your headunit is at fault. You can connect the remote lead to a switchable live at the headunit end to work around this problem. The amp will switch off when you switch the ignition off and vice versa. If that doesn't work then there may be a problem with your positive feed so check your fuse (there should be one near your battery where you see the amp cable connect) If that doesn't work, check how secure your earth lead is, kicker amps use a lot of power so these connections need to made to a clean metal surface. Scrape the paint away if you need to, make sure you have bare metal to connect to. Lastly, if you have only just installed the amp, check that you have thick enough power cable. As I said before, the amp will draw a lot of current, if the main power cable is too thin then you may not be getting enough current to power the amp. Hope this is helpful.
i've already test my amp and crossover by putting jumper fr/ B+12 to remote and both turned on,i'll be using ipod or mp3 player for music output thats why it made me confuse of the remote connection,yeah i'll just make a switch for the both of them beside so i could turn them off,thanks guys you help a lot,i used to set up old amps and they don't have remote switch they already have a built in switch.it's been a while,i should be chatting you guys to get informed,thanx again guys
Hello hexi_86, The amp is going into protection mode. If it goes into protection immediately upon power up, either the amp itself is defective or it is getting too high or too low of a voltage or current, or the outputs are shorted. 1) Make sure that the battery voltage, as measured at the amplifier?s +12 volt and ground terminals, is 11 volts or more (your alternator voltage is typically about 13.8 volts). So if you have 11 or less at the amp terminals, your wiring is too small or defective. 2) Check all +12 volt and ground connections. 3) The use of loudspeaker impedances below the recommended minimums will cause the amp to draw excessive current. Check by removing the speaker wires one at a time to locate a shorted wire or defective speaker. 4) Check all speaker connections. 5) Remove RCA inputs and see if the amp powers up properly. A shorted or grounded RCA cable can cause the amp to go into protection. If all these check out, the amp itself is probably shorted internally, most likely the output MOSFET's. In this case it needs professional repair or replacement. Hope this helps.
Do you have a battery positive wire as well as a switchable power wire? Is it properly grounded? Double check for power and ground. Aftermarket radios have two blue wires for switchable power. one for an amp, and the other for a power antenna. Make sure the right one is used.