Hiwatt T20/10 Combo

The T20/10 combo runs two EL84s at 20 watts, scales down to 10 when the room is small, and puts the result through a 100-watt 12-inch Octapulse so the speaker never becomes the limiting factor.

A normal channel and an overdrive channel share a three-band EQ whose Middle control pulls out for a tone shift. Behind them are a true spring reverb tank and an effects loop, both footswitchable, and a line output for the desk. The power stage is cathode-biased Class A, which is where the touch sensitivity comes from.

Wattage	Switchable - 20W or 10W
Channels	Normal, Overdrive
Inputs	1/4" Normal/Overdrive (Channel Selector); 3.5mm AUX Input; 1/4" Effects Loop Return; 1/4" Channel/Reverb Footswitch Input
Outputs	1/4" Extension Speaker, 1/4" Effect Loop Send, 1/4" Line Output
Preamp Valves	2 x ECC83 (12AX7), 1 x ECC82 (12AU7)
Output Valves	2 x EL84
Controls	Master Volume; Reverb Level; 3-Band EQ shared by both channels - Treble, Middle (Pull potentiometer for Tone Shift), Bass; Overdrive Gain; Normal Gain; Normal/Overdrive Channel Toggle; Standby - On/Off; Mains - On/Off
Speaker	Hiwatt Octapulse 100-12, 100 W, 12-inch
Reverb	True spring reverb, footswitchable
Power Stage	Cathode-biased Class A
Construction	Birch ply