This is an Ampeg SVT-7 PRO.
It puts out 1000 watts @ 4 ohms.
The Tube PreAmp runs on a 12AX7.
Controls include (PreAmp) Gain...Bass...Midrange...Treble...and Master Volume.
The Midrange has a Selectable 5-Position Frequency knob to choose the Freq you want to Boost or Cut.
Built in Variable Compressor.
Mute Switch.
Push in the -15dB Switch for Active Basses.
Ultra Hi and Ultra Lo switches like Vintage SVT's.
FX Mix to Blend in the FX Loop.
Headphone Jack to play without a cabinet.
The Back panel has (2) Speakon Outputs.
XLR O/P to go to the PA or DAW for Recording.
FX 1/4" Send and Return Jacks.
Tuner Out Jack.
PreAmp Out...and Power Amp In.
Foot Switch Jack.