Two setups in one head.

The LMK is the only 2-channel bass amp head made by Markbass. The LMK bass amp is designed for maximum flexibility with a unique design that allows you to set up different tone, filter, and volume setting for two separate basses (electric and acoustic). You can also use the Markbass LMK to combine two different sound sources from one instrument, or use the amp to magnify your bass along with an auxiliary input such as a drum machine or sequencer with complete control of each input. Each input has a 4-band EQ, Markbass' VPF (Vintage Pre-shape Filter) and level control - with the master adding a (Vintage Loudspeaker Emulator) filters and over Master volume knob.

On the LMK bass amp's rear panel you'll find a Neutrik Speakon combo jack output that accepts both Speakon or 1/4" speaker cable as well as a second 1/4" speaker out jack. You'll also find a balanced XLR out, unbalanced tuner out so you can tune as you play without passing your signal through pedals, and a Send and Return Effect loop which saves you from losing your signal if one of your pedals dies or a cable in the chain gives out.

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Markbass LMK 500W Two-Channel Bass Head Features:

Solid state preamp analog bass head
Provides 300W RMS at 8 ohms, 500W RMS at 4 ohms
1/4" input jack works with active or passive basses
Gain and Master volume controls
Clip warning light
EQs for both channels include controls for Low, Mid Frequency Low, High Frequency Low, and High
and VPF (Vintage Pre-shape Filter) filters
Master adds VLE (Vintage Loudspeaker Emulator) filter
Neutrik Speakon Combo out jacks for use with 1/4" or Speakon speaker cables
Balanced XLR out
Ch1/CH2 switch
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
Dual-sided fiberglass PC boards with lined perforations for high-quality solder connections
Surface-mount components are silicon-sealed to isolate vibrations
Computer-grade pre-assembled ribbon connector cable harnesses and ribbons for noise-free operation
Integrated threaded posts for easy assembly/disassembly and added durability
Rigid 2mm thick aluminium chassis for a long-lasting finish

Markbass LMK 500W Two-Channel Bass Head Specifications:

Power
Input A (master) impedance: 500Kohm, max. voltage: 15 Vpp
Input B impedance: 500Kohm, max. voltage: 15 Vpp
Effect Return impedance: 22Kohm, max. voltage: 10 Vpp
Output Power: 300W RMS at 8ohm, 500W RMS at 4ohm
Power requirement: 100/120V; 230V; 240V; 50/60Hz

Controls
GAIN CH1: 80dB to +23dB range
GAIN CH2: 80dB to +236dB range
GROUND LIFT: Switch on rear panel
MASTER VOLUME: Level control on front panel
LINE OUT: Level control on front panel
INPUT A/MASTER & B: Level controls on front panel

Equalization

CH1:
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)

CH2
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)

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"

Other
Dimensions: 10.87"W x 2.8"H x 10"D
Weight: 6.39 lbs.