Function: input,volume,bright, MID boost, rock/jazz, 3 brand EQ, OD(trim, level, ratio)master, presence, footswitch(overdrive/preamp boost), effect loops (return, send)

Output impedance select（4/8/16ohm)
Speaker: Celestion V30 speaker

Tubes: preamp 12AX7×3,power tubes EL84×2

Dimension: 43cm(long)×24cm(width)×50cm(high)
Grand Amp, 20w ODS, Dumble type amplifier. Available in head or combo, 8w, 22w, 36w, 50w or 100w. All options available. Handmade in China. 36/18 w ( run 2 or 4 EL84s tubes ) head inspired by Dumble #002 model ( Robben Ford ), EL84s power tube, reverb, effect loop. Footswitch for reverb, overdrive and boost. Interactive and sensitive settings. Fit to the tone and the spirit. This is a confident product that is the result of many years of research into the Dumble Overdrive Special.