7591A / 7868 30 Watt Mono Blocks, 5B-255M on request also.

The Retro225  7591A / 5B/255M  >  0.1 % distortion , Switchable 15 watts Triode, Ultra Linear  25 watts, Pentode 30 watts  ,very similar footprint to the Quad 11 Mono's . 

Constant Current Source 6E5P  input tube in triode mode or Western Electric Driver tube .

The 5B-255M is an STC/ITT  British made Western Electric 

The Retro 225  also has a Triode , Ultra Linear & Pentode Mode switch.

37 watt 5B-255M Option as output tubes 

Available with Lundahl or Ultra Wide band Japanese R core Orient Steel Transformers.  6hz to 65Khz (-1dB), input=4V 

Balanced XLR or RCA inputs.

 https://www.custommag.com/r-core-transformers 

MORE TO COME ON THESE !