The Markacoustic AH 250 is a compact and lightweight head for acoustic instruments. Connect it to your preferred cabinet/s, 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.

INPUTS

CHANNEL 1
impedance 500 Kohm, max. voltage 10 Vpp
CHANNEL 2
impedance 500 Kohm, max. voltage 10 Vpp
BALANCED CHANNEL 2
impedance 500 Kohm, max. voltage 20 Vpp
INSERT POINT
impedance 10 Kohm, max. voltage 20 Vpp

CONTROLS CH 1

GAIN
-45 dB to +28 dB range
EFFECT MIX
Internal effect only
EQ LOW
40 Hz, cut or boost up to 16 dB
EQ MID
600 Hz, cut or boost up to 16 dB
EQ HIGH
6 kHz, cut or boost up to 16 dB

CONTROLS CH 2

GAIN
-43 dB to +26 dB range
PHANTOM POWER
48V DC
EFFECT MIX
Internal effect only
VPF (Variable Pre-shape Filter)
center frequency: 380 Hz (cut)
EQ LOW
40 Hz, cut or boost up to 16 dB
EQ HIGH
6 kHz, cut or boost up to 16 dB

OTHER CONTROLS

PHASE
0°, 180°
ANTIFEEDBACK
20Hz (off), 400 Hz

OUTPUT

INSERT POINT
unbalanced, max. voltage 25 Vpp
SEND MIX
balanced, max. voltage 20 Vpp

OTHER

WIDTH
10.87 in. / 27.6 cm
DEPTH
10in. / 25.6 cm
HEIGHT
2.8 in. / 7.1 cm
WEIGHT
6.39 lbs / 2.9 kg
OUTPUT POWER
250W RMS @ 4 ohm, 150W RMS @ 8 ohm
POWER REQUIREMENT
100/120V; 230V; 240V
50/60Hz
(Voltage is factory preset according to region of sale)