My family gave me one for Christmas many years ago. I can never get rid of it. I kept playing with it. Pre-amp tube selection is a big deal. You can search here for various combinations. Putting a 12AY7 in V1 made the most difference. Played it like that for a long time, and then I put a Cannibus Rex in it. Left that thing hooked up to solid state PA head for about 3 days blasting away. Wow. That speaker cures a ton of issues with that amp. The spiky treble is tamed. Less beamyness. Now I really like this thing.