The smallest of the 4-series amps, and one of the rarest. The bass equivalent of the 730. Solid state preamp, but valve power amp.
VALVES: 4 x EL84s and one ECC83 driver valve. Around 30W.
BASS CHANNEL: volume, treble, middle, bass. Bass boost switch.
NORMAL CHANNEL: volume, treble, middle, bass. Mid boost switch.
EFFECTS: none.
SPEAKERS: Either a closed-back 2 x 12″ cab containing two Celestion T1088 alnico speakers; or, later on, the 2 x 12″ and 2 x 10″ cab that normally accompanied the UL460, as in the picture on the main page. Swivel trolley.