That's good to hear Sunil.
I assembled mine in 2016 April. so far so good. driving my Klipsch Heresy IIIs.
I too had strange hum and traced it to the connection to the TV through it's AV out to the amp / preamp. TV has a optical out so isolated it from the amp with a small Optical DAC and hum is gone. Even with DAC it was there earlier but had used the USB of TV to power the DAC. On using a separate source the hum vanished.
Also have a subwoofer KEF Kube 12b connected to the speaker output through an attenuator. That has no earth connection (two wire chord) and it was creating sort of microphonics due to the speakers on the input to the sub. Ran a ground to the sub and all is well now.
Sometimes that you don't suspect could be the cause
I assembled mine in 2016 April. so far so good. driving my Klipsch Heresy IIIs.
I too had strange hum and traced it to the connection to the TV through it's AV out to the amp / preamp. TV has a optical out so isolated it from the amp with a small Optical DAC and hum is gone. Even with DAC it was there earlier but had used the USB of TV to power the DAC. On using a separate source the hum vanished.
Also have a subwoofer KEF Kube 12b connected to the speaker output through an attenuator. That has no earth connection (two wire chord) and it was creating sort of microphonics due to the speakers on the input to the sub. Ran a ground to the sub and all is well now.
Sometimes that you don't suspect could be the cause
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