Thanks for chiming in so far! Good to hear that there's at least one original owner whose drivers look the same.
My Thiel 2.4s are powered by monoblocks from a local manufacturer called JK Acoustics. Their power rating is 105 watt into 4 ohm, but I figured they might suffice because of their dampening factor of 800 at 8 ohm. Speaker cables are Kimber 8TC, interconnects are Kimber PBJs.
I mostly stream, using a Schiit Yggdrasil dac and a pi2aes 2.0 streamer connected by an Audioquest carbon aes/ebu cable.