Is No. 7 geared more toward humbucker guitars or single coil guitars?
It’s not! I’ll readily admit that I am a Gibson guy. But I also play single coil guitars including Strats and my lovely 1956 Les Paul Junior, and guitars with mixed pickups and coil taps. No. 7 has a purity an clarity that brings out the character of whatever guitar you plug into it. A little story: I was showing Amplifier No. 7 at a guitar show. I actually had more than one guy come back to my booth to test out a guitar they were considering buying from another vendor, because they knew they would get a true and accurate impression of the guitar by playing it through a No. 7.