Tamura & Permalloy Nickel Fe/Si Output transformers 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 options.
The 5B-255M is an STC/ITT British made Western Electric .
Nickel Core Ne/Fi Permalloy Phase Splitting Transformers .
The Retro 225 also has a Triode , Ultra Linear & Pentode Mode switch.
Up to 37 watt 5B-255M Option as output tubes
Available with Lundahl or Ultra Wide band Japanese R core Orient Steel Transformers. 10Hz to 65Khz (-1dB), input=4V
Balanced XLR or RCA inputs.
MORE TO COME ON THESE ! INCLUDING PICTURES OF NEW LOOK MONO BLOCKS.
Wide Band Japanese Orient Steel .
World renown manufacturer