Quote:
Originally Posted by Ruleof72
My plan is to try some other power tubes but for now all I have are the KT88's. I will give a longer listen with the KT88/5U4 combo and see if that makes a difference.
Based on everything I've tried, is the hum coming from the power, the transformers, the tubes or some combination?
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What does your entire system consist of? I have 3 Inspire amps and none of them have that issue with 99db speakers.