How did you test it , at what impedance- I assume you're talking about ATM-300R ?Noisy, and only managed to produce 4 of the claimed 8W
I have owned ATM-2 for a short period but decided to go for integrated amplifier , AirTight sounded really good, powerful- drove my Kefs with an easy, lovely tonality for KT88 tubes - I much preferred ATM-2 to McIntosh MC275, transformer noise or it's level was no different from most of tube amplifiers I have owned over the time.Just wondering if there are any lovers/users of Air Tight Amplifiers on here.