Pre Loved Ashdown ABM-600-EVO IV Head Rack Mounted Version

This pre loved Ashdown ABM‑600 EVO IV is in excellent condition and is a robust, rack-mountable 600 W hybrid bass amp head (Class‑AB power amp + 12AX7 valve preamp) designed for pro-level gigging and studio use. It's the latest iteration in Ashdown’s renowned ABM series, offering enhanced tone-shaping and live-ready features

Key Features

Power & Chassis

• Delivers 600 W @ 4 Ω, powered by upgraded transformers and a solid-state power section

• Built in a rugged 3U, 2 mm steel rack chassis with front and rear mount points—tour tough

Variable Valve Drive Plus

• Upgraded 12AX7 preamp drives from clean to rich tube overdrive. Drive can be footswitch-activated for instant tonal shifts

9-Band EQ + Footswitching

• Traditional Bass/Mid/Treble knobs plus six precision sliders at 100Hz, 180Hz, 340Hz, 1.3kHz, 2.6kHz, 5kHz.

• EQ can be switched on/off via footswitch (e.g., FS‑4), enabling on-the-fly setting toggles

Dynamics & Low-End Enhancement

• “One-Knob” compressor delivers punch and consistency

• Sub-Harmonic Generator adds adjustable octave-down reinforcement for fat low-end

Pro Connectivity

• Dual VU meters monitor input and output levels

• Includes tuner output (remains live when muted), DI XLR, line input, transparent FX loop, speaker outputs via jack and Speakon 

Sound & Playability

• Tone versatility: Capable of everything from deep, clean lows to warm tube saturation and massive low-end punch. The 9-band EQ and valve drive ensure nuanced shaping for any genre

The ABM‑600 EVO IV is ideal for serious gigging bassists, session players, or pros needing a powerful, versatile and reliable head. It excels in rock, funk, metal, and anywhere a defined, punchy low-end is essential. Its rack-ready format suits touring rigs and studio setups.

The Ashdown ABM‑600 EVO IV is a formidable hybrid bass amp head—packing rich tube tone, flexible EQ control, dynamic tools, and heavy-duty design—making it a solid investment for bassists demanding power, tonal control, and stage reliability.