Conrad Johnson CAV45-S2 8 ohm? 4 ohm? Other?

It is 4 ohms. All CJ amps are 4 ohms. It also puts out more power than 45 watts. It is in essence a Classic 62 with input and volume control. With Sophia Electric EL 34s it is sonically closer to amps costing twice as much. 

Mezzanine, the factory can configure the amp for 16 ohms, which would be what you need.

Tone Publications has a new review out on the CAV45S2.

Mine has become my daily listener. Giving my CJ ET7 and CJ Classic 120SE some time off for good behavior. I will more than likely do the Teflon cap upgrade on the CAV45. It is so easy to listen to, and I am driving 4ohm 87db speakers.

The CJ Slovak 6922 are 1970 vintage some are earlier. That have a good inventory.

They use reissue EL 34 as do all other manufacturers. Their 6922 are NOS Slovak. The v3 will be a full 65 watts per channel. Should be out in March.