The HT Studio 20H Head offers huge versatility for home, rehearsal or studio use. The carefully voiced preamp, coupled with a cathode-biased EL34 power amp, provides you with the ability to create wonderfully lush tube tones. The three-band EQ is augmented by the Infinite Shape Feature (ISF), which works with the EQ to provide infinite new tone-shaping control. Plus you get digital reverb, an effects loop and a speaker emulated output. From pure boutique cleans, to mild overdrive that cleans up by backing off the guitar volume control, right up to saturated distortion, this amp does it all.