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But when prompted to drive the K1000s, it begs for mercy, clipping at only around 12 o’clock.
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Op-amps reaching their limit under high load. Give it better op-amps and give those more voltage to work with and the issue should go away... (matching impedance between k1000 and the amp would help too, but I am not sure how exactly impedance transformers influence the quality of the signal).
Excellent review, although I wonder how would this amp work with lower impedance headphones? Although low impedance issues are not difficult to fix, additional impedance is probably the easiest thing to add in the chain. Also how do you feel about its performance with classical through dt880s?
Also, what power adapter do you use? Sorry to be asking 10000 questions >.< Just bought 337's lil brother 332, while sitting with an hd595, and am wondering about ways to get the best out the amp (332 is supposedly very similar to 337), apart from tube-rolling.