Ashdown ABM-600 EVO IV Bass Magnifier 600-Watt Bass Head

Made in the UK for professional players, the UK-ABM-600-EVO IV offers 600 watts of crushing power with stunning tonal flexibility. With its Variable Valve Drive Plus, detailed 9-band EQ, Sub-Harmonic Generator, and One Knob Compressor, this amp brings legendary Ashdown tone and flexibility to the forefront.

Complete with intuitive foot-switch control and comprehensive stage/studio connectivity.

From Zero to Rock Hero

Variable Valve Drive Plus

The upgraded Variable Valve Drive Plus preamp section delivers more current to the 12AX7 tube, unlocking greater drive and harmonics content than ever before. Players can move seamlessly from pristine clean tones to full, fat bass overdrive.

The Drive level can be present and engaged via footswitch, giving instant access to a huge range of tonal textures.

The most advanced EQ system yet

Precision EQ

A familiar set of Bass, Middle, and Treble controls are paired with a powerful 6-band slider section at 100Hz, 180Hz, 340Hz, 1.3kHz, 2.6kHz, and 5kHz.

Footswitchable EQ access allows players to move from a flat fretless sound to a sculpted EQ setting in seconds. The new illuminated Input VU meter makes gain staging quick and intuitive.

Dynamic Tools for Every Player

One Knob Compressor

Ashdown's famous One Knob Compressor delivers punch and consistency with effortless simplicity, while the Sub-Harmonic Generator adds an octave below the played notes, ranging from subtle depth to thunderous low-end power. These classic ABM features guarantee a bass tone that cuts through any mix while retaining warmth and character.

Designed for Modern Performance needs

Professional Connectivity

The UK-ABM-600-EVO IV offers a comprehensive suite of connections. These include tuner output, Line Out, Line Input for external sources, transparent FX loop, and output muting for silent tuning. Two Neutrik Jack/Speakon sockets support flexible cabinet setups: a single 8 Ohm, two 8 Ohm cabs, or one 4 Ohm cab.

Ashdown's commitment to craftsmanship