ATCs own amps are very neutral with a hint of warmth. They are fast, extended and refined. Recently I compared the ATC amp to a Pass Labs xa30.8. The Pass was even more refined, more transparent, lower noise floor still I preferred the ATC amp in the end because it was more honest. The Pass sounded colored compared to the ATC. The Pass was slower and less airy. The ATC got the timbre and timing spot on which the Pass could not.
