Hiwatt T20/10 Head

Twenty watts of EL84 power with a switch that halves it to 10, which is how the T20/10 head gets its power valves to break up at a volume a stage can tolerate.

Two channels, normal and overdrive, share a three-band EQ with a pull-out tone shift on the Middle control. A true spring reverb tank and an effects loop are built in and both footswitch, and there is a line output alongside the extension speaker jack. Two ECC83s and an ECC82 make up the preamp, and the cathode-biased Class A output stage is what makes it responsive to picking.

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
Impedance	8Ω
Power Stage	Cathode-biased Class A
Construction	Birch ply