Divided By 13 is one of the longest-standing boutique builders in the U.S., starting up in the early 2000s. Designed by founder Fred Taccone, the BTR23 combines British-style preamp circuits within a simple layout of Volume, Bass/Middle/Treble tone stack, and a master control. The power section is particularly unique, utilizing 2x big bottle KT88s, which surprisingly produce a manageable 23 watts of power. The result is a bold, tasteful sound with plenty of drive on tap. The amp is in great condition, with only minimal signs of previous wear.