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575W bass amplifier head

 The ABM 500 EVO II is a 575 watts RMS bass amp head designed to satisfy both bass-purists and tech-heads alike.
 Three straightforward 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 in/out, and flat/shaped by footswitch, enabling players to go from a flat fretless sound to a boosted sound via a favourite EQ setting.
 A single input is switchable for passive and active instruments with a blend of solid state and dual triode tube preamps stages which can be preset and selected by footswitch, providing access to a massive range of clean, warm and overdriven tones.

 Also footswitchable is the mighty Ashdown sub-harmonic generator which precisely tracks the main signal and reproduces it an octave lower.
 A sub-harmonic level control enables the player to 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 features a front-panel mounted balanced DI out with pre or post EQ switching, a sub-bass output, a tuner output, an 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 new upgraded power section has faster transient attack, more headroom and even less noise.

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  * Spec
 Power Output
    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
    134mm (5.3")
 Width
    474mm (18.7")
 Depth
    315mm (12.4")
 Weight
    14kg (30.9lbs)