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Ashdown ABM 600 EVO IV 600W Bass Head

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  • 600W bass amplifier head
  • Valve pre-amp, solid-state power
  • Built in compressor, sub-harmoniser, 9-band EQ

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from £21.19
per month (APR 19.9%) read more
Term: 36 months
APR: 19.9%
Min Deposit Amount: £64.90
Estimated Monthly Payment: £21.19

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Immediately identifiable on stages around the world thanks to its glowing VU meter, the Ashdown ABM has been a firm favourite with professional gigging bass players for the best part of twenty years. Now in its fifth incarnation, ABM EVO IV pairs class-leading preamp sophistication with uprated powerhouse performance and an all-new 9-band EQ. The ABM 600 EVO IV teams the ABM preamp with a gut-rumbling 600W power stage.

Variable Valve Drive Plus – from zero to rock hero

The Variable Valve Drive preamp section has also been upgraded in EVO IV. Delivering more current to the 12AX7 tube enables more drive and harmonic content than ever before, enabling players to dial in a sound from pristine clean, to the fattest, fullest bass overdrive currently available.
The Drive level can be preset and kicked in and out via footswitch, providing access to a huge range of clean, warm and overdriven tones.

The best EQ in the business just got better

Bassists plugging into EVO IV will be greeted straight away by the flickering of the new Input VU meter, allowing them to quickly find the sweet spot for their instrument. From there, EVO IV features a sophisticated 9-band EQ, with familiar Bass, Middle and Treble controls and six sliders providing precision cut and boost at 100Hz, 180Hz, 340Hz, 1.3KHz, 2.6KHz and 5KHz. The EQ can be switched in via footswitch taking the player from a flat fretless sound to their favourite EQ setting instantly. The new 9-band EQ is a revelation of sonic perfection and will surprise older ABM users.

Designed to be as simple to use as a 3-band EQ but offering outstanding tonal shaping options, the ABM EQ features familiar Bass, Middle and Treble rotary controls and two triplets of additional sliders.

With the sliders set in the center position the three knobs function just like a classic 3-band EQ. But if you require more flexibility, the additional sliders allow you to fine tune the EQ in the regions the standard controls can't reach, providing a huge range of variation and allowing you to tailor the perfect sound for any gig.

The EQ can be switched in via footswitch taking you from a flat fretless sound to your favourite EQ setting instantly.

One knob compressor

Other ABM favourite features are retained in EVO IV, including Ashdown’s famous One Knob Dynamic Compressor. Kick it in and this simple to use, great sounding compressor delivers a powerful, even sound, guaranteed to help your bass fill out any mix.

Sub-Harmonic Generator

Once heard – never forgotten. The ABM Sub-Harmonic generator adds an octave below the notes being played bringing fullness to any bass part. The Sub level is independently controllable, letting you dial in anything from a subtle hint of deep bass to a full-on subterranean funk.

Flexible Footswitching

Paired with the FS-4 footswitch (not included) the ABM comes alive for onstage use, enabling on-the-fly tonal gearshifts. With footswitchable Valve Drive, Compression, EQ and Sub Harmonic Generator, ABM puts dozens of sound combinations at your feet, without so much as an effect pedal in sight.

Professional Connections

Not that you'd expect any less, ABM is loaded with connectivity. A tuner output, Line out, transparent FX loop and a Line Input for the connection of an external sampler or sound source. Output muting cuts the signal from the DI output but leaves the tuner output 'live', allowing the player to tune up in silence.

ABM Cabinets

Complementing the new heads are two new ranges of cabinets: Foundation Range cabinets are hand-crafted in the UK featuring 18m ply and custom high- powered BlueLine Plus drivers; Classic Range cabinets offer affordable performance, with a ply cabinet and BlueLine standard drivers.

However you choose to serve up your sound, whether you prefer the fat low-end of a 1x15” or the snap and punch of a 4x10”, Ashdown ABM cabs are tailored to give your ABM the best possible tone.

Available in 2x10” + horn, 4x10” + horn, 1x15” + horn, 8x10” + horn versions with Ashdown Blueline drivers, or choose the lighter weight UK made NEO range with compact cabinets and SICA Neodymium speakers (available in 1x12” + horn, 1x15” + horn or 2x10” + horn cabinets).

Tech Specs

Additional Information

Manufacturer Ashdown

Power Output: 600 Watts
Power Requirement: 115 - 230 Volts
Speaker Outputs: 2 x Jack/Speakon outputs
Frequency Response: -3dB an 17Hz und 30kHz
High Instrument Input: Impedance 3.9m Ohm, input range 150mV -
Low Instrument Input: Impedance - 10k ohms Input range 300mv to 40v p - p
Line Input: Impedance 22k Ohms / Input level 0dBu nominal
DI Output: 600 Ohms balanced / Level -20dBu nominal With Ground Lift
Tuner Output: Impedance 22k Ohms, level 0dBu nominal
Impedance: Minimum 4 Ohms
Effects Send: Impedance 22k Ohm, Level 0dBu nominal
Effects Return: Impedance 22k Ohms, Input Level 0dBu Nominal
Pre-Amp Tubes: 1 x 12AX7
H x W x D (mm): 134 x 474 x 315
Weight (kg): 15

Product Condition New
Delivery & Returns

We aim to ship all orders received before 2:00PM on the same day. Orders received later in the day or at the weekend will ship on the next working day. All orders over £100 ship with free next working day delivery with a one hour delivery window.

Orders over £49.99 but below £100 qualify for free shipping which generally takes 2-3 days to arrive or can be upgraded to express for a small charge.

Alternatively all orders can be collected from our Derby store by choosing Click & Collect at the checkout. Please note these details are for UK delivery only, non-mainland orders may take longer and/or incur an additional charge, for international orders please contact us.


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