Question about Kustom KPM4080 80 Watt Powered Mixer
This unit is 4 years old and only used once a year to run a CD player thru it. I just got it out plugged in the speakers and turned it on. Lots of static, that's all. I did tighten a screw located on the bottom, center that was a little loose.
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Posted on Jan 02, 2017
Have you tried connecting a single speaker to each output and cutting the volume down to see if you have a load or impedance problem? The amp may be perfectly fine except it's trying to play to a 2 ohm or less load :-)
Posted on Mar 16, 2011
SOURCE: I have 2 Kustom KPC10MP
Hopefully you were powering ALL interconnected equipment from the SAME receptacle. People can destroy the input circuit of powered speakers by plugging them into a receptacle at the stage and then powering the mixer from another receptacle... Pro's know to power ALL interconnected equipment from the same source, be it a receptacle or a power conditioner to avoid ground bounce damage to equipment. They carry power from the stage back to the mixer on an extension cord. You may have had a static discharge that blew one side of the balanced input of the speaker. The parts are inexpensive, however the labor to get at the amp is usually not fun. I have the dual 10 powered Kustom's and one gets at the POWER amp via removing the speaker after the grille... HOWEVER that is to get at the power amp. The Preamp is probably the failure and it is right at the input plug area and you can get at that by removing the panel with the plugs and power switch and volume control.
I don't have the schematic. Look for shorted RF bypass caps on one side of the balanced input circuit and possibly a damaged input op amp.
Posted on Apr 06, 2011
SOURCE: I have a KPM 4080
The most common cause of a fuse blowing is excess current... now what has/could cause that is impossible for us to diagnose remotely. Failure in the power amp would be prime suspect with power supply components a close second. Double check that fuse rating... if on 120 volts it sounds low... it would be right for 220 operation.
Posted on Jun 05, 2011
SOURCE: Kustom KSC 4080 Just bought -
The missing nut is not likely to kill the channel. You just bought this so exercise your warranty... unless it is used in which case you bought someone else's problem. Somebody probably blew out the channel by zapping it with high voltage that destroyed the input circuit of the channel. Often there are bypass capcitors right at the input which short out. If this is boiught used, take to a repair shop and if new, exercise your warranty. I suspect they removed the nut from the connector to mark the dead channel.
Posted on Aug 18, 2011
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