Ampeg - SVT4 Pro Tube Pre-Amp 600 Watts 8ohms

Specifications

RMS Power Output: 300-Watts x 2/900 (mono-bridged @ 8 Ohms)
RMS Power Output: 490-Watts x 2/1200 (mono-bridged @ 4 Ohms) 
RMS Power Output (2 Ohms): 600-Watts x 2 
Preamp: Tubes (3 x 12AX7) 
Power Amp: Solid State 
Tone Controls: 3-Band 
Mid Tone Control: 5-Position 
Graphic EQ: Yes, 9-Band 
Ultra Low/High Boosts: Yes 
Balanced Line Out: Yes x 2 Pre/Post with Level
Effects Loop: Yes x 2
Preamp Out/Power Amp In: Yes x 2
Dimensions (W x H x D inches): 19 x 5.6 x 15.5
Weight: 39.5 Pounds