Ashdown Original Bass Magnifier UK-OBM-500 500W Bass Amp Head - Ice Blue

Built for players who want higher output with straightforward tone control in a compact format, the Guitar Center Exclusive Ashdown Original Bass Magnifier UK-OBM-500 delivers 500W of output in a UK-built bass amp head designed for stage, rehearsal and recording applications. Its streamlined layout combines a 5-band EQ with Ashdown’s Pre-Shape control for flexible tone shaping, while a switchable passive/active input accommodates different instrument output levels. A balanced DI output and FX loop support integration with live sound, recording setups and external effects, while Ashdown’s signature VU meter provides visual feedback for setting input level. With auto-voltage capability and a lightweight design, the UK-OBM-500 provides a portable, high-output foundation for a range of bass rigs.

500W Power With 5-Band EQ and Pre-Shape Control

The UK-OBM-500 pairs a 500W solid-state power section with a flexible 5-band EQ for detailed control across the frequency range. Bass, low-mid, mid, high-mid and treble controls let you adjust low-end weight, midrange presence and high-frequency definition, while the Pre-Shape switch provides quick access to a familiar Ashdown tonal contour. A switchable passive/active input accommodates basses with different output levels, while separate input and output controls provide independent adjustment of preamp level and overall volume. Ashdown’s signature VU meter provides visual feedback for monitoring input level.

DI Output, FX Loop and Auto-Voltage Operation

A balanced DI output provides a direct connection to front-of-house systems or recording equipment, while the FX loop integrates pedals and external processors into the signal path. Auto-voltage capability supports operation across different international power standards, expanding the head’s usefulness for travel and touring. Built in the UK and available as a Guitar Center Exclusive, the compact Ashdown Original Bass Magnifier UK-OBM-500 combines 500W of output, straightforward tone shaping and essential connectivity in a portable bass amp head.

Ashdown Amplification Arrives at Guitar Center

Since 1997, Ashdown has built its reputation on powerful, road-ready amplification trusted by bassists on stages around the world. From its iconic Bass Magnifier amps and bass cabinets to pedals, guitar amplification and artist-driven designs, the family-run company has remained dedicated to giving players distinctive tone and dependable performance while renewing its commitment to UK-built craftsmanship. Guitar Center is proud to partner with Ashdown, bringing the brand’s celebrated amplification legacy to musicians nationwide.