From Markbass:

The Little Mark Tube solves the “tube or solid state” dilemma. The Little Mark Tube 800 goes a step further by also addressing that other perennial concern, “Will I have enough power?” The 800 watts from this powerful amp will satisfy any thirst for power, and the two blendable preamps give you the warmth and richness of a tube preamp, the clean attack of a solid state preamp… or a mix of both!

INPUTS

• INPUT 1: impedance 500 Kohm, max. voltage 15 Vpp
• INPUT 2: (Balanced XLR/1/4" combo)
• BALANCED: impedance 500 Kohm, max. voltage 15 Vpp, phantom power 48V
• EFFECT RETURN: impedance 33 Kohm, max. voltage 10 Vpp

CONTROLS

• GAIN 1: -60 dB to +23 dB range
• GAIN 2: -60 dB to +23 dB range
• MIX: mixes tube and solid state gain
• MASTER VOLUME 
• LINE OUT LEVEL 
• GROUND LIFT (switch on rear panel)
• PRE/POST EQ  (switch on rear panel)
• MUTE (push/pull on master knob)
• PHANTOM POWER switch (on INPUT 2 / Balanced)

EQUALIZATION

• LOW: center frequency 40 Hz; level: ±16 dB
• LOW MID: center frequency 360 Hz, level: ±16 dB
• HIGH MID: center frequency 800 Hz, level: ±16 dB
• HIGH: center frequency 10 kHz, level: ±16 dB
• VPF (Variable Pre-shape Filter) center frequency 380 Hz 
• VLE (Vintage Loudspeaker Emulator) frequency range 250 Hz-20 kHz 

OUTPUTS

• LINE OUT: balanced XLR, max. voltage 20 Vpp
• EFFECT SEND: unbalanced, max. voltage 20 Vpp (pre-EQ)
• TUNER OUT: unbalanced, max. voltage 2 Vpp
• SPEAKER OUT: speakon/1/4" combo, 1/4"

OTHER

• WEIGHT: 6.61 lbs / 3 Kg
• WIDTH: 10.87 in. / 27.6 cm
• DEPTH: 9.84 in. / 25 cm
• HEIGHT: 3.27 in. / 8.3 cm
• OUTPUT POWER: 800W RMS @ 4 ohms / 500W RMS @ 8 ohms
• POWER REQUIREMENT: 100/120V; 230V; 240V - 50/60Hz (Voltage is factory preset according to region of sale)

Comes with MarkBass soft Case. Some scratches to the top and side.