SKU: 887312992

Ashdown UK-ABM-300-EVO4 UK Built Bass Magnifier Head - 300W

Sale price$733.05 Regular price$814.50
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Ships within 48 hours · Estimated delivery Aug 8 - Aug 13

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Description

Ashdown UK-ABM-300-EVO4 UK Built Bass Magnifier Head - 300WFor over two decades, the Ashdown ABM range has set the standard for bass players seeking authentic tone, immense power, versatility, and unwavering reliability. Recognisable by its glowing VU meter, the ABM series has graced stages across the globe. Now, the ABM EVO IV takes this legacy even further. Its class leading preamp sophistication combines with a formidable 300 watt power stage, available in three head versions rated at 300W, 600W, and

For over two decades, the Ashdown ABM range has set the standard for bass players seeking authentic tone, immense power, versatility, and unwavering reliability. Recognisable by its glowing VU meter, the ABM series has graced stages across the globe.

Now, the ABM EVO IV takes this legacy even further. Its class-leading preamp sophistication combines with a formidable 300-watt power stage, available in three head versions rated at 300W, 600W, and 1200W. The Variable Valve Drive Plus offers a wide range of tones, from clean to overdriven, with foot-switch control for seamless transitions.

But the real star of the show is the all-new 9-band EQ, providing precision control over your sound. It's accompanied by Ashdown's One Knob Dynamic Compressor and Sub-Harmonic Generator, ensuring your bass cuts through any mix.

Professional connections, including a tuner output, transparent FX loop, and Line Input, make the ABM EVO IV a versatile choice for stage and studio. Paired with the optional FS-4 foot-switch, you'll have complete control over your tonal shifts.

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 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.
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 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.
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.

A pair of Neutrik Jack/Speakon sockets with a minimum 4 ohm load provide flexible partnering options with a dedicated range of ABM EVO IV cabinets. The ABM 300 EVO IV can be used to power a single 8 ohm cabinet, a pair of 8 ohm cabinets or a single 4 ohm cabinet.
Flexible Footswitching
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 in sight.

Specifications

  • Power Output - 300 Watts
  • Power Requirement - 115-230 Volts
  • Speaker Outputs - 2 x Neutrick Jack/Speakon outputs
  • Frequency Response - -3dB @ 17Hz und 30KHz
  • High Instrument Input - Impedance 3.9m Ohms, input range 150mV
  • Low Instrument Input - Impedance 10k Ohms, input range 300mV - 40V p-p
  • 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
  • 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) - 146 x 488 x 336
  • Weight (kg) - 12.5
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 887312992

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4.1 ★★★★★
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Mike Millikan Maldonado-Melendez
Battle Creek, US
★★★★★ 5
Good product!
Set name: Space Gray
It accomplishes my expectations
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Reviewed in the United States on June 3, 2026
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Verified Purchase
Luis Felipe Martinez
Battle Creek, US
★★★★★ 5
Excellent USB-C hub for my MacBook Air M3
I’m very happy with the UGREEN Revodok Pro 9 in 1 USB-C Hub. The packaging is very well done and gives a great first impression right out of the box. The hub itself feels solid, robust, and well built. I have been using it for about two weeks with my MacBook Air M3, and so far, I have not had any issues. It is truly plug and play: my computer detects all connected peripherals immediately, and everything works as expected. I also tested the display on/off button, and it works correctly. My current setup is the hub connected to my MacBook Air M3 with a 22” LG monitor through HDMI, while I connect a second 29” LG widescreen monitor directly to the laptop using a Thunderbolt cable. With the MacBook lid closed and both external monitors connected, I get: * 2560 x 1080 on the 29” HDR WFHD monitor * 1920 x 1080 on the 22” Full HD monitor One important thing to keep in mind: if you want to use three screens at the same time — two external monitors plus the MacBook screen — this setup will not work because the MacBook Air M3 does not support that configuration in this way. I still need to test the SD card reader and PD charging, but based on my experience so far, this hub has worked perfectly. Overall, great build quality, easy setup, reliable performance, and a very practical accessory for my MacBook. I definitely recommend it.
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Reviewed in the United States on May 21, 2026
C
Verified Purchase
Connor Kennedy
Waukegan, US
★★★★★ 5
Solid, stable USB-C hub that works well with both Mac and Windows machines
Great dock that works well with with Mac and Windows, and seems to be able to handle anything I can throw at it. I've had other UGREEN combo video+usb dongles that really bogged down when I used the video port, however this one did not even break a sweat when pushing out 1080p@60fps from my MacBook while handling multiple USB inputs and outputs, power delivery, and ethernet all at the same time. Definitely would consider this to be some of the best value for money around on the budget-conscious side of the USB-C hub/dock market.
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Reviewed in the United States on February 4, 2026
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Verified Purchase
J. Hankerson
Louisville, US
★★★★★ 5
great quality hub for your needs
works for connecting items to my laptop. it's a little bulky but it does the job i need it to and seems well built
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Reviewed in the United States on June 8, 2026
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Verified Purchase
Tobi
Omaha, US
★★★★★ 5
Hell yeah
Love this, except it only works for my ipad, for some reason, it only charges my Samsung phone, note it might be user error. I didn't really try to check what the problem was because I bought it to use on my ipad. I use it to play pubg, and it works pretty good.
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Reviewed in the United States on February 24, 2026

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