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Markbass Markacoustic AH250 250W Acoustic Amp Head   (Open Box)
Ships Internationally
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Product# 583793

Lightweight acoustic amp with strength and craftsmanship that is undeniably Markbass.

The Markacoustic AH250 is a compact and lightweight amp head for acoustic instruments. Connect it to your preferred cabinets, or use it as a preamp without a speaker—just take a line from the XLR out and set your master volume to zero. The analog amp is 150W @ 8 Ohms or 250W @ 4 Ohms, and offers two preamp channels (one 1/4" jack and one XLR/1/4" combo jack with switchable 48V phantom power). Anti-feedback and phase reverse controls allow you to capture the true essence of your acoustic sound while enjoying serious headroom.

The Markacoustic AH 250 acoustic head is a great choice for anyone who needs a small, light and portable amp head to amplify acoustic instruments. It can be connected to your preferred cabinet/s, or directly to a mixer via the line out (you can use it as a preamp without connecting it to a speaker—just set your master volume to zero).

The amplifier head is powered by an analog amp (150W @ 8 Ohms/250W @ 4 Ohms) and features Markbass' own custom-designed digital power supply circuitry. There are two preamp channels, with a 1/4" jack input for Channel 1, and an XLR/1/4" combo input for Channel 2, with switchable 48V phantom power.

Anti-feedback and phase reverse controls allow you to easily manage feedback and phase problems and capture the true essence of your acoustic sound while giving you serious headroom.

  • Unbalanced 1/4" input jack
  • Balanced xlr / 1/4" combo input jack
  • Ch1 gain
  • Ch1 clip led
  • Ch1 low equalization control knob
  • Ch1 mid equalization control knob
  • Ch1 high equalization control knob
  • Ch1 effect mix control knob
  • Effect selection knob
  • Phase switch
  • Antifeedback control knob
  • Power on led
  • Ch2 gain (pull out to engage phantom power on balanced XLR - 2 -)
  • Ch2 clip led
  • Ch2 low equalization control knob
  • Ch2 high equalization control knob
  • Ch2 vpf filter level control knob
  • Ch2 effect mix control knob
  • Line out level knob
  • Master volume level knob
  • Mix clip led
  • Main on/off switch
  • Ah250 rear pane l
  • Ac power socket
  • Speaker out speakon / 1/4" combo jack
  • Speaker out 1/4" jack
  • Insert point
  • Ground lift control switch

Amplifying your acoustic instrument with the AH 250 just makes you a much louder version of yourself. Order now.


Markacoustic AH250 250W Acoustic Amp Head

  • Input ch1 unbalanced impedance: 500 KOhm, max. voltage: 10 Vpp
  • Input ch2 unbalanced impedance: 1 Mohm, max. voltage: 10 Vpp
  • Balanced impedance: 1 Mohm, max. voltage: 20 Vpp
  • Insert point impedance: 10 Kohm, max. voltage: 20 Vpp
  • Gain CH1 -45 dB to +28 dB range
  • Gain CH2 -43 dB to +26 dB range
  • Line out level control on front panel
  • Phantom power 48V DC (on CH2 Input, pulling out the CH2 GAIN knob)
  • Ground lift switch on rear panel
  • Effect mix Internal effect only
  • Phase switch on front panel (0° to 180°)
  • Antifeedback 20 Hz (off ) to 400 Hz range
  • Master volume
  • Equalization CH1
  • Low 40 Hz; level: ±16 dB
  • Mid 600 Hz; level: ±16 dB
  • High 6 kHz; level: ±16 dB
  • Equalization CH2
  • Low 60 Hz; level: ±16 dB
  • High 5 kHz; level: ±16 dB
  • VPF (Variable Pre-shape Filter) center frequency 380 Hz (cut)
  • Chorus 1
  • Room
  • Revb 1
  • Revb 2
  • Hall
  • Chorus 2
  • Outputs
  • Insert point unbalanced, max. voltage 25 Vpp
  • Line out balanced XLR, max. voltage 20 Vpp
  • Speaker out speakon / 1/4" combo jack, 1/4" jack
  • Dimensions: Height: 3.16" (2 rack units)H x 10.87"W x 10"D
  • Weight: 6.39lb.
  • Output power: 250W RMS @ 4 Ohm, 150W RMS @ 8 Ohm

Review Snapshot®

by PowerReviews
MarkbassMarkacoustic AH250 250W Acoustic Amp Head

(based on 2 reviews)

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Reviewed by 2 customers

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little mark (bass amp) sounds better


from Ellicott City, MD

About Me Experienced

Verified Reviewer


  • Easy To Use
  • Portable
  • Powerful


  • Chorus Sans Reverb
  • Limited Functions

Best Uses

  • Acoustic Bass
  • Performances

Comments about Markbass Markacoustic AH250 250W Acoustic Amp Head:

Sounds OK, easy to connect and operate, but overpriced; limited effects usage: chorus+reverb can only be used in a single setting; other settings separate one effect from the other, which may be limiting; tube-driven little mark sounds better with the acoustic instruments; there are cheaper acoustic setups that sound and function better than this unit.

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(0 of 1 customers found this review helpful)


Plenty of headroom

By Nestor

from El Paso Tx

About Me Professional Musician

Verified Buyer


  • Easy To Use
  • Excellent Sound
  • Good Warmth
  • Portable
  • Powerful


    Best Uses

    • Events
    • Performances
    • Professional Recording

    Comments about Markbass Markacoustic AH250 250W Acoustic Amp Head:

    Be sure to use 2 ohm matchup and you will get a strong and warm sound. I
    tried a high end nylon guitar with a baggs pickup and I couldn't believe the quality. I then hooked up a high end archtop a hollowbody and a les paul with a tube pre-amp and got a sound that is as good as it gets. This is just a high end poweramp that is versatile that you can use different cabinets. The best combination I got was with 8" twin eminence alpha cabinet.

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