I would recommend the Leben HiFi CS 600 Integrated valve amplifier ( 32 watts Push Pull) or the Leben CS 660P stereo amplifier (40 Watts Push Pull) to match with the Harbeth C7ES-3.
As a more power valve option I would recommend the Air Tight ATM-2 stereo Push Pull valve amplifier at 80 watts a channel in to 8 ohms.
Push Pull valve amplifiers are a better match with Harbeth speakers than Single Ended Triode designs.
Jason Parmenter.
Harbeth audio distributor in New Zealand.
Parmenter Sound
As a more power valve option I would recommend the Air Tight ATM-2 stereo Push Pull valve amplifier at 80 watts a channel in to 8 ohms.
Push Pull valve amplifiers are a better match with Harbeth speakers than Single Ended Triode designs.
Jason Parmenter.
Harbeth audio distributor in New Zealand.
Parmenter Sound