• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

45 SE tube amp OPT

Depends on your budget. If you don't have much to spend, you could try the cheap hammonds (125ESE, FSE, etc). However I found they didn't sound great, ok but not great.

If you have more to spend, the lundahls or one electrons are reputedly good.

And then there's always silver wire magnequest... :smash:

As PRR inferred, the driver stage and speakers of the amp will make a huge difference. Go for a proven 45 design, and use efficient speakers.