Kenwood basic m2 stereo power amp,has A+B speaker output A channel is going into protect mode at relatively low volume whereas the B channel can be driven hard without going into protect, any ideas?

Mike Duncan

• 219 Answers
• Posted on May 11, 2007

SOURCE: car stereo static

Sounds like you may have an output transistor/module about to go out.

SOURCE: Denon AVR-810 going into PROTECTION mode

It sounds like there is a problem with the differential circuit. The bias I am not sure about, as every unit is different. You should get the service manual to be sure or call Denon and see if they can give you an idea. Good Luck

SOURCE: Protect Mode With Sony str-de595

Hi snark63

Ypou have an intermittent problem that sounds to be heat related... the more work the amp does, the more heat generated by the output stages. This will be aggravating some poor solder joints that are cracked or dry. The unit needs some repair work done in these areas. If you have good experience with a soldering iron, the cure for this is to resolder the power stages of the unit, or any other solder joints that look to be failing.

I am more than happy to answer any other questions you may have about it, please get back to me here, or use the ASK function to go straight to me :) If you are still unsure, have problems, or we need to look at the situation more deeply, then before you give a rating for this advice, hit the ASK button Thanks for using FixYa, If you consider the advice I have given you as sound, a FixYa rating is a great reward for my efforts to help you. Cheers.

regards robotek

SOURCE: Volume turned up, kenwood shuts off briefly...

does it keep cutting in and out?
if so i think you have your polarities crossed
make sure you have negative to negative positive to positive

SOURCE: I have a Kenwood car stereo model # KDC-MP342U.

hold down preset 3 & 6 + reset
press preset 1 - shows dc err
press preset 1 - shows dc ok
press preset 2 - shows dc 2-4
press preset 2 - shows dc 2-0
then unit should be ok with eeprom reset