Price: $799.99
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The ABM 500 EVO III is a 575 Watt RMS bass amplifier head that’s designed to satisfy both bass-purists and tech-heads alike. Three straightforward rotary tone controls provide 20dB of EQ cut and boost at 60 Hz, 660 Hz and 5 kHz. These controls are supplemented by two pairs of additional sliders giving 15dB cut and boost at 180Hz, 340Hz, 1.3 kHz and 2.6 kHz. The EQ can be switched in/out by a footswitch, enabling players to go from a flat fretless sound to a boosted sound by taking advantage of a favorite EQ setting. A single input is switchable for passive and active instruments with a blend of solid state and dual triode tube preamps stages. This can also be preset and selected via footswitch, providing access to a massive range of clean, warm and overdriven tones.

Also footswitchable is the on-board compressor and 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 tones. The ABM 500 EVO III features a front-panel mounted balanced DI output 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.


  • Power Output (RMS) 575 Watt
  • Power Requirement 230 Volt
  • Speaker Outputs 2 x Jack/Speakon outputs
  • Frequency Response -3dB an 17Hz und 30kHz
  • High Instrument Input Impedance 3.9m Ohm, input range 150mV -
  • Low Instrument Input Impedance - 10k ohms Input range 300mv to 40v p - p
  • Line Input Impedance 22k Ohms / Input level 0dBu nominal
  • Sub Output Impedance 1k Ohm, level 0dBu Nominal
  • DI Output 600 Ohms balanced / Level -20dBu nominal With Ground Lift
  • Tuner Output Impedance 22k Ohms, level 0dBu nominal
  • Impedance minimum 4 Ohm
  • EQ bass +/-15dB @ 45Hz Middle +/-15dB @ 660Hz Treble +/-15dB @ 7kHz shelving Slider 1 +/-15dB @ 180Hz Slider 2 +/-15dB @ 340Hz Slid
  • 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) 134 x 474 x 315
  • Weight (kg) 14
MSRP $1,099.99