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Doge91
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Jan 23, 2017
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Been using this amp for 3 weeks now. It sounds really great with HD 650 right now, but I was dissatisfied in the beginning. The tubes really NEED at least 50-80 hours of listening until they start sounding like they are supposed to. Just listen to music normally, no need to take long sessions of pink noise or sin wave... The sound comes to life after 50+ hours. I've replaced the stock driver tubes today with M8161 tubes, and right off the bat it sound "bad" again. All new tubes need time until they open up.
Jan 23, 2017
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