The Markbass CMD 121H is a bass combo amplifier that delivers incredible, professional-quality sound in a compact, easy-to-manage package. Less than 2' wide or tall, and under 40 pounds, the CMD 121H provides an amazingly large amount of power with its 12" B&C woofer with a 1" compression driver with custom horn. This is due in part to the excellent design of the speaker, and the way the cabinet was built to protect the integrity of your sound. But the CMD121H amps's sound is also increased by the built-in presence of the Little Mark II solid state preamp. It gives you a 4-band EQ, Markbass' own VLE (Vintage Loudspeaker Emulator) and VPF (Variable Pre-shape Filter) filters, and the ability to hook up to an extension cab for even more room-filling sound.
12" B&C woofer
1" compression driver with custom horn
Little Mark II preamp built into front panel
Great power-to-weight ratio
Made of high-grade, multi-ply poplar
Glued, screwed, and sealed internally with special compounds for maximum sound quality
Protected corners
Grill for protecting speakers
Lightweight
Handle on top for carrying
Little Mark II
Provides 500W at 4 ohm or 300W at 8 ohm
Gain and Master volume controls
Clip warning light
EQ includes controls for Low, Mid Frequency Low, High Frequency Low, and High
VLE (Vintage Loudspeaker Emulator) and VPF (Variable Pre-shape Filter) filters
Ground lift switch to eliminate hum
Tuner out sends unbalanced signal sent to a tuner, amp or recording equipment not needing a balanced signal
Send and Return Effect ensures main signal continues even if something dies in your effects chain
Speaker: 1 x 12"
Tweeter: 1" compression driver with custom horn
Bass reflex: rear
Impedance: 8 ohms
Sensitivity: 99 dB SPL
Speaker power handling: 400W RMS (AES Standard)
Amp output power: 500W at 4 ohm/300W at 8 ohm
Frequency response: 45Hz to 20kHz
Crossover Frequency: 3.5kHz
Dimensions: 23.6"W x 15.3"H x 18.3"D
Weight: 39.5 lbs.
Little Mark II head
Power
Input impedance: 500Kohm, max. voltage: 15 Vpp
Balanced Output (XLR): 22Kohm, max. voltage 25 Vpp
Effect Return impedance: 22Kohm, max. voltage: 25 Vpp
Output Power: 300W RMS at 8 ohm, 500W RMS at 4 ohm
Power requirement: 100/120V; 230V; 240V; 50/60Hz
Controls
GAIN 80 dB to +23 dB range
MASTER VOLUME
GROUND LIFT: switch on rear panel
Equalization
LOW
Center frequency: 40Hz; level ±16dB
LOW MID
Center frequency 360Hz, level ±16dB
HIGH MID
Center frequency 800Hz, level ±16dB
HIGH
10kHz shelf; level ±16dB
VPF (Variable Pre-shape Filter)
center frequency 380Hz (cut)
VLE (Vintage Loudspeaker Emulator)
frequency range 250Hz 20kHz (cut)
Outputs
EFFECT SEND
Unbalanced, max. voltage 20 Vpp (pre-EQ)
TUNER OUT
Unbalanced, max. voltage 25 Vpp
LINE OUT
Balanced XLR, max. voltage 10 Vpp
SPEAKER OUT
Speakon, 1/4"
Korpa 
