This amplifier is fantastic, it offers an unusual musicality, I bought this amp for speaker, electrostatic & acoustic energy reference, my amp push push el84 and single end 6l6 were unable to run on electrostatic VM 6.5, I was totally subjugated by the power of this amp, while being as musical as my tube amp with a bigger definition, the piano and harpsichord instruments and violins, are rendering very rich with lots of material and beautiful natural I have a lot of amplifier krell mcintosh mark levinson yba plinius, jadis sonic frontiers Conrad Johnson audio note manley vtl audio research I can say that this amp tact / lyngdorf is also good to see superior some of the models sited, this amp has amp quality Has 5x and more of this value, the one who looks for an amp with a lot of musical power and neutral without any hardness I highly recommend !!! An excellent combination with pre-amplifier tube