Ashdown ABM 900 EVO II Head
Ashdown ABM 900 EVO II Head
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iamqman 07/09/2011

Ashdown ABM 900 EVO II Head : iamqman's user review

« Simply amazing! »

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This is the second installment of the EVO 900. Nothing drastic has really changed from the first. Both are simply amazing bass heads. Ashdwon has been able to grab a huge portion of the bass amp market in a relativity quick pace. Artist from U2 to System of the Down have used the Ashdown products on there stage and studio rooms.

This bass amp is one of the best sounding and most versatile units on the market today. This head is a whopping 900 watts of extreme low end power. You get enough power to play and stage in any area or club in the world. This head can cover a ton of ground with the available tones in this head.


Power Output: 575 watt + 575 watt
High Instrument Input Impedance: 3.9m Ohms, input range 150mV - 20mV p-p
Low Instrument Input Impedance: 10k Ohms, input range 300mV - 40V p-p
Stereo Line Input Impedance: 22k Ohms, input level 0dBu nominal
Effects Return Impedance: 22k Ohms, input level 0dBu Nominal
Tuner Output Impedance: 22k Ohms, level 0dBu nominal
Sub Output: Impedance 1k Ohms, level 0dBu Nominal
Effects Send: Impedance 22k Ohms, level 0dBu nominal
DI Output: 600 Ohms balanced, level 0dBu nominal
Speaker Outputs: Minimum impedance 4 Ohms
Shape (Push Flat): +8dB @ 50Hz & 4kHz, -8dB @ 400Hz, filter slope - 6dB/octave
Bass: +/-15dB @ 45Hz
Middle: +/-15dB @ 660Hz
Treble: +/-15dB @ 7kHz shelving
Slider 1: +/-15dB @ 110Hz
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
Height: 158mm (6.2 in.)
Width: 610mm (24 in.)
Depth: 355mm (14 in.)
Weight: 28kg (61.7lbs)


Once I plugged into this head I immediately knew that i had a winner. The controls are a little confusing at first but after a few minutes you get the idea of how they constructed the unit.

The sub control are a little tricky at first. These are the controls under the basic EQ up top. I am referring to the drive, compression, and sub harmonics. Using these sparingly and wide open will give you an assortment of optional tones and various control over how the bass EQ gets thick or thinner or more distorted. You can really dial in overall tone that will better match your bass guitar and or the pickups that you are using.


These units are harder to fin now that they have the Evo 900 lll. I think you can find them under $700 on the used market. Not a bad price for the tone of this unit. This amp is much better that say a Gallien-Krueger or Hartke. This amp has a round tone that will fit in a metal band and a pop bubble gum band. The versatility is pretty much endless when it comes to fitting this amp in any band setting. I would recommend this amp to anyone searching for a great sounding bass amp that will fit any need you may have.