The WEM Dominator Bass MK1 bass amp was WEMs bass version of the Dominator MKIII tube amp, first available in 1972. Both were 15 watt amps, electronically identical, but the Bass had a 15" Celestion speaker (G15M, 55 Hz, 16 ohms), as used by Marshall and other British amp manufacturers.
The valves are 3 x 12AX7 preamp, and 2 x EL84 power tubes, perfect for an overdriven sound at low volumes. Despite the intended bass use, these may be more widely used as guitar amplifiers. All the same, it is a nice bass amp for a grittier retro bass sound. Works relly well with guitar also!
