I assume your 7" spec relates to height (as already pointed out). I also assume this height limitation is for limited clearance into a shelf system. If my assumptions are correct you will have a hard time, not because you might not find an amp less than 7" tall, just that even if you do, and it fits, you will not have sufficient clearance to dissipate the heat from the tubes. In an open rack you probably should allow 6" or more clearance from the tubes. FWIW.
Looking for an integrated tube amp under $2500
I’m in the market for either a used or new tube integrated amp to drive my Lawrence Audio Violin SE speakers which have an AMT tweeter. These speakers have a sensitivity of 88db and minimum impedance of 6.4 ohms. The amp should sound warm and smooth without any treble glare. The amp must be also reliable since my previous amp visited the repair shop 3 times in 4 years. I do prefer it come in black and must be 7" or less. I appreciate any recommendations.