The HT Studio 20 head offers huge versatility for home, rehearsal or studio use and can be used with a variety of cabinets including the matching HT112 and HT212. The carefully voiced preamp coupled with a cathode-biased EL34 power amp, provides the user with the ability to create wonderfully lush valve tones. From pure boutique cleans, to mild overdrive that cleans up by backing off the guitar volume control, up to highly saturated distortion, this amp does it all. HT Studio 20 Head Overview 20 Watt valve combo 2xECC83, 2xEL34 Two footswitchable channels Enhanced tone controls Patented Infinite Shape Feature (ISF) Master volume Digital reverb Speaker emulated output Effects loop 1-way footswitch included Cool vintage styling HT Studio 20 Head Features Overview 20 watt, 2xECC83, 2 x EL34 The HT Studio 20 is a 20 Watt Combo that uses 2xECC83 and 2xEL34 valves. ISF (Infinite Shape Feature) Our patented ISF control can take you from the USA to the UK and anywhere between in seconds. Two footswitchable channels The HT Studio 20 features two footswitchable channels to allow you to switch between the Clean channel and the Overdrive channel. Reverb Control The HT Studio 20's Reverb control sets the overall level of the reverb effect. Turning the control clockwise will increase the amount of reverb.