ABM-600-EVO IV Head
Ashdown ABM 600 evo iv head right
Ashdown ABM 600 evo iv head left
Ashdown ABM 600 evo iv head rear
ABM-600-EVO IV Head

Ashdown Engineering

ABM-600-EVO IV Head

£849.00

Unleash your bass's true potential with the Ashdown ABM EVO IV. For over two decades, the ABM range has been the go-to choice for bassists seeking unrivalled tone, versatility, power, and reliability. Now in its fifth iteration, the ABM EVO IV pushes the boundaries further.

The 600W head features the Variable Valve Drive Plus, offering an array of clean to overdriven tones at your fingertips. The new 9-band EQ, with precision controls, ensures you find your perfect sound effortlessly. And let's not forget the Input VU meter, which streamlines the setup process. 

ABM EVO IV retains beloved features like the One Knob Dynamic Compressor and the Sub-Harmonic Generator, enriching your bass notes with depth and character. Professional connectivity options, including a tuner output, transparent FX loop, and Line Input, make this head stage-ready and studio-friendly.

With flexible foot-switching capabilities, you can control Valve Drive, Compression, EQ, and Sub-Harmonic Generation on the fly, giving you countless sound combinations without extra pedals. Elevate your bass playing with the Ashdown ABM EVO IV.

Pairs well with

Ships within 1-2 business days (UK Customer Orders Only)

5 Year Warranty

Engineered to Last, Trusted by the Best

Product Specifications

POWER

• Power Output – 600 Watts
• Power Requirement – 115–230 Volts

CONNECTIVITY & I/O

• Speaker Outputs – 2 × Jack/Speakon outputs
• High Instrument Input – Impedance 3.9M Ohms, input range 150mV
• Low Instrument Input – Impedance 22k Ohms, input level 0dBu nominal
• Line Input – Impedance 22k Ohms, input level 0dBu nominal
• DI Output – 600 Ohm balanced, Level 0dBu nominal
• Tuner Output – Impedance 22k Ohms, Level 0dBu nominal
• Effects Send – Impedance 22k Ohm, Level 0dBu nominal
• Effects Return – Impedance 22k Ohms, input level 0dBu nominal

PERFORMANCE

• Frequency Response – -3dB @ 17Hz to 30kHz

DIMENSIONS & WEIGHT

• H × W × D (mm) – 146 × 489 × 336
• Weight (kg) – 12.5

Variable Valve Drive Plus

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 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.

9-BAND EQ

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.

ONE KNOB COMPRESSOR

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 any mix.

Sub-Harmonic Generator

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.

Professional Connections

User

manual

CLICK THE IMAGE ABOVE TO DOWNLOAD THE USER MANUAL

FAQs

Please read our FAQs page to find out more.

How Long Will My Order Take To Arrive?

Orders placed before 3pm (Monday-Thursday) are dispatched on the same day. UK Customer orders are shipped on a next-day delivery service via TNT.

Do You Shop To Outside Of The UK?

Currently, we do not facilitate orders to outside of the UK. If there is a specific product that you are after, be sure to check our Dealer Locator to find your closest Ashdown dealer!

If you cannot find a local dealer, please do not hesitate to get in touch and we will try and assist!

Do Ashdown Products Come With A Warranty?

Yes! All Ashdown product purchased include a 5 year warranty, giving you peace of mind and long-term support.

For more information on warranties, visit our Warranty Info page!

Where Can I Buy Ashdown Spares and Accessories?

Spare parts, footswitches, and accessories can be purchased directly through our in-house service team. If you're looking for something specific, our team will be happy to point you in the right direction!

How Can I Contact Ashdown Support?

Our passionate UK-based team is always ready to help. You can get in touch by phone or email, and we'll be happy to assist with any questions.

Didn’t find your answer?

Don't hestitate to contact us