Is it good as it says “The AD-66D's Class A amplifier stage is based on the use of two pairs of high power Toshiba TTA1943/TTC5200 transistors, allowing to develop 2x80W under 8Ω or 2x135W under 4Ω.”? I’m new here so i really lack knowledge/experience and currently building my first setup. Got my speakers(kef q150) and receiver(wiim pro plus) now and looking for an amp. Maybe this or aiyima a70. Should i go with tonewinner?