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Product 485021

Ashdown ABM 500 EVO II Mono Bass Amp Head   

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The ABM 500 EVO II is a 575W RMS bass amp head designed to satisfy both bass purists and tech-heads alike. Three rotary tone controls provide 20dB of...Click To Read More About This Product

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The ABM 500 EVO II delivers high-powered tone with plenty of tools to shape it.

The ABM 500 EVO II is a 575W RMS bass amp head designed to satisfy both bass purists and tech-heads alike. Three rotary tone controls provide 20dB of cut and boost at 60Hz, 660Hz and 5kHz and are supplemented by two pairs of additional sliders, giving 15dB cut and boost at 180Hz, 340Hz, 1.3kHz, and 2.6kHz. The EQ can be switched on/off and flat/shaped by footswitch, enabling you to go from a flat fretless sound to a boosted sound with ease. The single input is switchable for passive and active instruments. A blend of solid state and dual-triode tube preamp stages can be preset and selected by footswitch, providing access to a massive range of clean, warm, and overdriven tones.

The footswitchable subharmonic generator precisely tracks the main signal and reproduces it an octave lower. A subharmonic level control lets you add just the right amount of low-end reinforcement--everything from a subtle thickening of the sound to unbridled, bone-crushing tone.

The ABM 500 EVO II also features a front panel-mounted balanced direct out with pre- or post-EQ switching, a sub-bass output, tuner output, FX loop, and a line input for connecting an external sampler or sound source. Output muting cuts the signal from the direct out but leaves the tuner output live, allowing silent tuning. The upgraded power section has faster transient attack, more headroom, and even less noise.

  • 575W RMS
  • 7-band EQ
  • Switchable active/passive input
  • Tube/solid state preamp stages
  • Subharmonic generator adds low-end reinforcement
  • Front-mounted direct output with pre- and post-EQ switching
  • FX loop
  • Tuner output

ABM 500 EVO II Mono Bass Amp Head

  • Power Output: 575W
    High Instrument Input: Impedance 3.9mOhm, input range 150mV-20mV p-p
    Low Instrument Input: Impedance 10kOhm, input range 300mV-40V p-p
    Stereo Line Input: Impedance 22kOhm, input level 0dBu nominal
    Effects Return: Impedance 22kOhm, input level 0dBu Nominal
    Tuner Output: Impedance 22kOhm, level 0dBu nominal
    Sub Output: Impedance 1kOhm, level 0dBu Nominal
    Effects Send: Impedance 22kOhm, level 0dBu nominal
    DI Output: 600 ohm balanced, level 0dBu nominal
    Speaker Outputs: Minimum impedance 4 ohm
    Shape (Push Flat): +8dB @ 50Hz and 4kHz, -8dB @ 400Hz, filter slope - 6dB/octave
    Bass: ±15dB @ 45Hz
    Middle: ±15dB @ 660Hz
    Treble: ±15dB @ 7kHz shelving
    Slider 1: ±15dB @ 180Hz
    Slider 2: ±15dB @ 340Hz
    Slider 3: ±15dB @ 1.3kHz
    Slider 4: ±15dB @ 2.6kHz
    Frequency Response: -3dB at 17Hz and 30kHz
    Power Requirements: 230/115V
    21"W x 8"H x 12-3/4"D
    31 lbs.

Review Snapshot

by PowerReviews

(based on 4 reviews)

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Reviewed by 4 customers

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(2 of 2 customers found this review helpful)


Real Bass Amplification

By BCR73

from Naples, FL

This amp is truly a work of art, I have it plugged in to a 410T cab and the 115 cab, it pushes them hard without breaking a sweat. i thought B4 i got it home that i should of got the 900, No Way this is plenty of power, and the on board effect are reall easy to use and sound teriffic. If your looking for a rig for moderate to large venues look no further. as Adam Clayton from U2 said this is the end of a life long search for Bass amplification.

(1 of 1 customers found this review helpful)


Killer Amp

By DP-qGm4d

from Detroit Rock City

This amp is practically indescribable. If you have experienced the "Ashdown sound," then you know what I am talking about. There is just no other amp that comes close to it. You can pound it, and it just keeps pouring out great tone. Unbelievable!

(1 of 1 customers found this review helpful)


Nice Piece of Kit

By RyanSelf

from Denver, CO

See all my reviews

I play rock with a Precision and a pick. I had an GK 1001RB-II, but it just wasn't doing it for me. Plenty of power, but just not the right sound. I mean, I couldn't get a good warm sound without running into solid-state clipping and overdrive. Anyway, I picked this thing up after hearing so much about it, and I haven't looked back. I can get the GK sound by fiddling with the eq and turning off the valve drive, but I can get so much more goodness with the valve drive on and the mids boosted.The GK was fine, but the Ashdown made my bass sound so much better.


Top Amp

By SP8600

from Wales, UK

See all my reviews

Had this amp a few weeks and been to practice with it. It really cuts through the guitar and I can create any tone that I want. And its loud, very loud. Not a bad word to say about it so far.

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