Ashdown ABM-600-EVO IV 600W Bass Magnifier Head EVO IV
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.
in its fifth incarnation, ABM EVO IV pairs class-leading preamp
sophistication with uprated powerhouse performance and an all-new 9-band
EQ - available in three head versions, two are rated at 600W and one at
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
Our 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
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 offer 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 sub octave note for huge
bass tones. Kick it in and this simple to use, great sounding compressor
delivers a powerful, even sound, guaranteed to help your bass fill out
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
Paired with our 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
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.
Complementing the new heads we have also announced 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
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).
ABM-600-EVO IV Specifications:
115 - 230 Volts
2 x Jack/Speakon outputs
-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
Impedance 22k Ohms / Input level 0dBu nominal
600 Ohms balanced / Level -20dBu nominal With Ground Lift
Impedance 22k Ohms, level 0dBu nominal
Minimum 4 Ohms
impedance 22k Ohm, Level 0dBu nominal
impedance 22k Ohms, Input Level 0dBu Nominal
1 x 12AX7
H x W x D (mm)
134 x 474 x 315