Question about Kenwood KAC-859 Car Audio Amplifier

Kenwood kac 859 amp

How do I reset the amp... the red light is flashing on the amp...the car was bought used and i have no information on the amp.. the amp has power.. it has good ground. the amp trigger wire is also working with the key on and the fuses are good.. but i cant seem to get any sound outta the speakers... thanks

Anonymous Sep 23, 2008

I have the same problem, light flashing. My amp has been installed for 7 years and nothing changed, it just stopped working today. So likely an internal problem.

2 Answers

Anonymous

The amp will reset every time it's turned off. The red light flashing, instead of staying constant is a warning that one of the protection circuits are activated. If the amp is bridged wrong, it can do this. If the load impedance is too low, it can also do this... don't trust the speaker, it it says 4-ohm, it may actually be 3.8-ohm, which could cause a problem if two speakers are wired in parallel. If it's not getting enough power, it will turn off briefly, but will turn back on after a second. A capacitor is not necessary with this, just use 4 gauge cable and have a good battery... make sure the ground is good, that one is commonly ignored.

Posted on Aug 21, 2007

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11 Answers

Hi, note that if you are not using the proper gauge b+ and gnd cable with this amp then the current available at the amp wont be sufficint to keep amp on. also try using this amp while vehicle is idling. if this doesnt work then disconnect all spks from amp and check if red lite stops flashing. if it doesnt stop flashing then amp has internal fault. if lite stays on brite then proceed to check each spk load impedance, then reconnect each spk individually. the minute red lite starts flashing it will give you a clue that the channel or spk load is faulty. cheers

Posted on Aug 05, 2007

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