The Ashdown UK-OBM-500 is a new evolution of the much-loved OriginAL EVO platform now hand-built in the UK, finished in bold Ice Blue, and upgraded to deliver a commanding 500 watts of clean, reliable bass power. Designed for musicians who want a straight forward, great-sounding amp they can take anywhere, this ultra-compact and lightweight head punches well above its size.
Its tonal foundation is shaped by a responsive 5-band EQ, offering precise control across your frequency spectrum without complication. For players who prefer instant, polished tone, the classic Pre-Shape switch provides a sculpted contour that enhances clarity, low-end punch, and mix-cutting definition at the press of a button. This makes the UK-OBM-500 equally suited to rehearsal rooms, live stages, and studio environments.
Connectivity is streamline yet flexible: the DI output delivers a clean, reliable signal for front-of-house or recording, while the FX Loop allows you to integrate external effects with ease. The addition of auto-voltage capability ensures the UK-OBM-500 can operate safely and consistently anywhere in the world a must for travelling bassists.
Visually, the UK-OBM-500 sets itself apart with its striking Ice Blue finish, compact footprint, and understated, purposeful design. Built with Ashdowns commitment to quality and longevity, this head offers the essential features bassists rely on, packaged in a rugged, portable, and high efficient format.
Clean, powerful, and refreshingly uncomplicated, the UK-OBM-500 delivers the tone you need, the portability you want, and the reliability you expect from Ashdown.
SpecificationsPower Output: 500 Watts
Power Requirements: 115-230 Volts
Speaker Outputs: 2 x Jack Outputs
Frequency Response: -3dB @ 22Hz and 25kHz
High Instrument Input: Impedance 3.8m Ohms, input range 150mV - 20 p-p
Low Instrument Input: Impedance 1M Ohms, input range 150mV - 10V p-p
Line Input: Impedance 10K Ohms, input range 300mV - 40V p-p
Di Output: 600 Ohm balanced, Level -20dBu nominal
Impedance: Minimum 4 Ohms
Signal to Noise: Better than 80dB (EQ Flat)
EQ: Bass +/-15dB @ 100Hz, Lo Mid +/-15dB @ 220Hz, Middle +/-15dB @ 660Hz, Hi Mid +/-15dB @ 1.6kHz, Treble +/-15dB @ 7kHz shelving
Effects Send: Impedance 22k Ohm, Level 0dBu nominal
Effects Return: Impedance 22k Ohm, Input Level 0dBu nominal
Distortion: Less than 0.5% THD
Dimensions: 89 x 220 x 209 mm
Weight: 2 kg
