Backyard Guitars 509.308.0845

The BiValve is the versatile tube junky’s dream that you’ve already heard about. The power tubes are swap-outable in any combination, as long as they are octal based. It comes with the stock EL34s, but you can experiment with KT77s, 6V6s, E34Ls—whatever you want—and you don’t have to rebias when you swap tubes. It also has a built in Hot Plate attenuator so you can get a maxed out sound at a lower volume.

As you might expect, the sounds you can get from the BiValve range from garage nasty to AC/DC rockin’ to deep clean. It all depends on the settings you choose and, of course, the tubes you put in. $1395 retail.