The C30 is all-tube 30 watt Class A combo and is the smallest of the Speed Twin range. Sharing many features of its bigger brothers, the 50 and 100 watt Speed Twins, the C30 has a single 12- inch speaker and two channels with switchable high/low gain, an Accutronics reverb and effects loop. The two independent channels provide access to both clean sounds and ruder lead and rhythm tones.