Mine is a ‘68 drip edge, 50 watt head, with the AB165 circuit (according to the Fender sticker inside the amp) paired with an Avatar 2×12 cabinet loaded with Weber 12F150s. Those speakers are a great match with this amp. Had my amp tech go thru it and he disabled the negative feedback loop stating it wasn’t necessary. Whatever that means, and he has been working on Fender amps for more than 30 years. Apparently Fender classifies the expertise of its techs into categories with platinum expertise being their highest classification. So, I put stock in his knowledge about amp circuitry. I also installed NOS preamp tubes. RCA 12AX7As for both channels, and a Mullard CV2024 (12AT7) in the phase inverter (V6) position. I have tried a few different combinations of power tubes in the amp. I’ve tried some GEs, Sylvania’s, Svetlana Wing Cs, JJ 6L6GCs, and the GT-6L6-GE made by Groove Tubes. The Groove Tubes 6L6 was a pleasant surprise. Of the old stock tubes the GEs were my favorite, and the Groove Tubes 6L6 had just a bit more complexity compared to the JJs. But either of the new production tubes complimented this amp. As far as what guitars sound good with this amp, a Tele was a nice surprise. All of my other guitars—Les Paul, 335 and Strat—pair well with the amp. You just have to dial in the right amount of treble and bass. I have jumped the amp but feel like it gets away from the core tone in the Normal channel. I always have the bright switch engaged on that channel. I have experimented with the Bass channel but always go back to the Normal channel. All in all, this amp is worth holding on to. I paid $550 for it, plus another $100 to have my amp tech go through it. I already had the Avatar cabinet, so I think I made out just fine with this purchase. One last thing, I use the amp for outside gigs and it has no problem with being heard. My indoor gigging amp is a ’74 Fender Pro Reverb. Another vintage amp that often goes unnoticed. I call it my baby Twin Reverb, as it is rated at 40 watts, compared to the 85 watts of the most common Twin Reverb.