Question about Kustom KPM4080 80 Watt Powered Mixer

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What causes static in my Kustom KPM 4080 with nothing running thru it?

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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6ya6ya
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Posted on Jan 02, 2017

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cnavarro
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SOURCE: I have a Kustom KPM 4100 amp head that's cutting

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 :-)

Carl

Posted on Mar 16, 2011

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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

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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

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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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I have a Kustom KPM8420 PA mixer and the monitor channel comes through both the monitor and main speakers and vice versa. The two channels are not separate.How do I fix that?


On the back panel there is a section labelled Patch Bay
There are 2 small switches which assign each Power Amp to either Monitor or Main Output.
It would seem you have them both set the same at present. Set one to Monitor and one to Main, and use the corresponding Power Amp outputs direct to speakers.

Note you can send signal to external amps or powered speakers from the preamp outputs. This is really handy.
Download and print the manual from https://www.manualslib.com/manual/90516/Kustom-Kpm-8420t.html
and keep it with the mixer.

( Of course don't send speaker outputs to other amps or powered speakers )

Sep 11, 2017 | Kustom Music

1 Answer

Hello. Where is the fuse located to be replaced in my Kustom KPM4060 Amp. Thanks Shawn.


I have the same problem with my KPM 4080 amp. I have no clue where the fuse goes. I'm sure mine also needs a fuse replaced.

Mar 11, 2015 | Kustom Music

1 Answer

My limiter is always on, no sound


Hi, i would like to know what you have running into the input side of the mixer and also what you have running on the output side. I am unclear, does it make any sound at all? Is your mute button pressed?

Dec 20, 2013 | Kustom KPM 8420 400 Watt Powered Mixer

1 Answer

Kustom KSC 4080 Just bought - channel 1 is dead, for both 1/4-inch and XLR inputs. By the way, the nut securing the 1/4-inch jack is gone (any wild possibility that creates a grounding issue that cuts out...


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.

Aug 18, 2011 | Kustom KPM4080 PA Amplifier/Mixer

1 Answer

I have a KPM 4080 mixer that has a blown 1A fuse. What would be the most common cause.


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.

Jun 04, 2011 | Kustom KPM4080 PA Amplifier/Mixer

1 Answer

I have a Kustom KPM 4100 amp head that's cutting out. It works OK for 5-10 mins then crak snap crakle then nothing. After a cooling off period I can repeat the process. I have pulled the power amp and...


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 :-)

Carl

Mar 16, 2011 | Kustom KPM4100 PA Amplifier/Mixer

2 Answers

I have the Phonic powerpod 820. I ordered a Kuston powered floor monitor to add too the system. I know not to hook it up too the speaker outputs on the back of the mixer. So where do I hook up the powered...


You will plug an UNBALANCED 1/4 inplug cable into the MONI jack on the front of the unit. The other end will probably need to be an XLR plug to connect to the Kustom POWERED monitor. Please note that the UNBALANCED output of the Phonic is NOT good engineering practice. The Phonic stuff is normally low-end and they don't do everything correctely, although for a small system it should work. IF you get excessive hum from using a long cable to the Kustom with a "Kludged" unbalanced to balanced cable, you MAY need to use a DI box at the Phonic end to convert the unbalanced Phonic MONI output to a balanced line (XLR to XLR) for a longer run to the Kustom monitor. You might get a 1/4 inch TS to XLR balanced plug that has a transformer in it and use an XLR to XLR cable to the Kustom. Please note that having this plug in the Phonic hangs out and is easily bent over so I would recommend using a right angle connector at the Phonic and plug the 1/4 inch TS to XLR adaoter into that so the yanking of the XLR cable won't break the 1/4 inch adapter off in the Phonic.

Feb 23, 2011 | Phonic Powerpod 820 / S712 PA Package

1 Answer

When i power up my line 6 spider 3 ( i think it has two 75 watt speakers) all the lights work but no sound at all no static or speaker sound even at full volume. cable checks out, but even with a bad cable...


A pilot light means almost nothing other than the power cord is plugged in and hot and the switch is on. In this case, other lights run from various DC supplies so the inout fuse is presumed to be good... NEVER replace a fuse without knowing what caused it to blow or you will usually do more damage within a unit. There are several power supplies and you will typiclly find +/-15 volts on the op amps and 3.3 volts on the processor logic. Unless something simple like the speaker cable falling off this will NOT be a DIY repair. I would look to see if this speaker cable might have fallen off and ALSO check if you get any sound using headphones.

Nov 06, 2010 | Line 6 Spider Iii 120 Stereo Guitar Combo...

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