土炮? That is Audible illusions Duo Mono pre-amp, (Costed more than Bendini 25/25 by far) highly rated by TAS..Power amp is Audio Research D100B. Sold amp years ago...still got the pre-amp. Used the tube pre amp to drive a pair of high speed transistor mono blocks, Class AB.
Also have a high speed transistor pre amp to drive a pair of mono class A tube amps...