Markacoustic AH 250
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.
Photos
INPUTS

CHANNEL 1
impedance 500 Kohm, max. voltage 10 Vpp
CHANNEL 2
impedance 1 Mohm, max. voltage 10 Vpp
BALANCED CHANNEL 2
impedance 1 Mohm, max. voltage 10 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
60 Hz, cut or boost up to 16 dB
EQ HIGH
5 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)

NOTES:
Markbass and Markacoustic amps/combos are manufactured to be sold and used in the country of purchase, and they are factory preset to that country’s voltage.
Due to homologation issues, the voltage may not be changed.

Rack ears do not come included with this head.

This head is designed for use with any acoustic instrument including acoustic guitar, double bass, acoustic bass guitar, mandolin, banjo, violin, viola, cello, etc.

Product specifications are subject to change without notice
 

AH 250 owner's manual
104_allegato_1.pdf (Size: 739.4 kb)
    Preamps
    Power Amps