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.
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Markbass Markacoustic AH250 250W Tube Acoustic Amp Head Features:
- 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
Line out XLR
Markbass Markacoustic AH250 250W Tube Acoustic Amp Head Specifications:
- INPUTS
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
CONTROLS
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)
ONBOARD DIGITAL EFFECTS
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
