23.5 kilograms of pure valve muscle. 200 watts of it, built in England back in the 1970s, using 4 x KT88s in the output.
This monster simply oozes handbuilt quality, and sounds incredible. If you have bass bins capable of handling the output, I can guarantee you haven't heard them sound as good as this thing will make them sound.
A pre-amp would be needed to give control over tones and volume, but then stick this between that and your bass bins and prepare to have your trouser legs flapping.
Very, very rare amp.
Sold to Martin