This is a Markbass SD1200 High Power Bass Head.
It puts out 1200 watts so it's got tons of headroom.
It's warm and clear, even at full volume.
The Gain knob lets you dial in anytrhing from a pristine clean, to a growling overdriven tone.
Tone controls include...Low (Bass)...
(2) Parametric Midrange controls (100-800Hz) & (700Hz-6kHz)...
so you can boost or cut each by +/- 16dB...
and High (Treble).
It also has the VLE (to filter high frequencies) and VPF (to boost low & high frequencies...cutting the mids)
to dial in your tone even more precisely.
A Master Volume for the cabinet and a Line Out Volume to go to the Mixing Board or to your recording DAW.
The Back panel has (2) Speakon O/Ps.
1/4" Tuner out.
1/4" Effects Send and Return.
XLR Line Out.
This thing is a Monster Head !!
