I have a similar Dennis Had built amp. The guy built and founded Cary Audio, so I guess he may know a thing or two about building amplifiers. Mine was built with the following:
* Fully regulated low impedance tube screen grid B+ power supply
* Fully regulated low impedance input tube driver, 6922, B+ power supply
* Large oil filed regulated power supply section filter cap
* Filter choke Pi-Network power supply
* Precision non-inductive metal film 3 watt resistors
* Paper and oil filed, epoxy encapsulated, coupling and by-pass capacitors
* Gold plated copper output speaker posts
* EE Teflon silver stranded 19 strand hook up wiring
* Pure 99.9% Silver Teflon Insulated internal coax interconnect
* Custom design 15 watt SE air gapped output transformers with separate feed-back winding, left and right channel matched pair
* 200 % duty cycle CCS power transformer designed for 120/240 VAC 50/60 Hz primary
* .080 (12 ga) aluminum chassis and matching bottom plate with large soft rubber shock mount feet
* 5 watts per channel output with 6V6 output tubes and 5Y3 rectifier tube
* 7 watts per channel with 6L6, KT66, 5881 output tubes and 5U4 rectifier tube
* 10 watts output with KT88, EL34, 6550, KT99, and KT120 output tubes with 5U4, 274B rectifier tube
* 12 watts output with KT-120 output tubes and 5AR4 rectifier tube
******** 10 watts output into 2 ohm loads with KT88 or KT120 output tube with 5AR4/GZ34 rectifier ********* This is a serious SE amplifier!!
* Duty cycle of the amplifier is 24/7 in full operate conditions
Easy to pick it apart until you get a chance to listen to it. It is a fantastic amp that surprised me the first time I heard it.