Hum in Khartago mono amp

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esus1

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Hum in Khartago mono amp
« on: 14 Aug 2020, 01:49 pm »
This is my first year of owning the Khartago mono amps. They have been great. I recently noticed that one of them has a hum that is coming from the speaker. No matter where I plug (AC) the symptom does not change. The other identical mono amp has no noise when plugged into the exact same outlet. The preamp feeding them is a Schiit Saga and it is  turned off.
Any ideas on what this may be?

All thoughts are appreciated.


Speedskater

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Re: Hum in Khartago mono amp
« Reply #1 on: 14 Aug 2020, 01:58 pm »
Did you try using other interconnect cables?
Did you try swapping interconnect cables Left to Right?
Is everything plugged into the same AC mains outlet?

esus1

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Re: Hum in Khartago mono amp
« Reply #2 on: 14 Aug 2020, 02:05 pm »
Hello Thank you for the advice.
I just now determined that a line from the preamp was the culprit eventhough the preamp was turned off.
I disconnected it and the problem is gone.
That line was going to a sub from the preout. I will track this down now that its beend isolated.

Thanks again!


steverii

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Re: Hum in Khartago mono amp
« Reply #3 on: 16 Aug 2020, 12:04 am »
I know this goes against all the safety rules, but I have often had to use a "cheater" plug on the powercord going to the sub to remove hum.