Ampeg SVT-4PRO Bass Amplifier Head

The Ampeg® SVT® line of pro-level amps is synonymous with power and durability. The SVT-4PRO crystallizes this philosophy, delivering more performance, flexibility, and power than any other amp in its class.

In true SVT tradition, the SVT-4PRO is capable of a huge variety of must-have sounds at high volume over extended periods of time. To achieve this, Ampeg packed a ton of tone-sculpting into its burly 3U chassis, mating the extensive preamp with dual high-output Class AB power amps. In addition to Ampeg’s classic 5-position Midrange control, which allows you to dial in the center frequency of the peaking midrange filter, there’s shelving bass and treble filters, and—if that weren’t enough—nine bands of carefully chosen graphic EQ. You can even use the graphic EQ as a “second channel,” making an alternate sound as easy as a tap on a footswitch.

Thanks to its hybrid tube/solid-state design, the SVT-4PRO delivers signature fat and warm Ampeg Round Sound, plus the entire sonic palette that players of any stripe might need to get the job done.

- 300 watts x 2; 900 watts mono-bridged @ 8 Ohms
- 490 watts x 2; 1,200 watts mono-bridged @ 4 Ohms
- 600 watts x 2 @ 2 ohms
- Defeatable Optocoupler limiters
- 1/4" and Neutrik® speakON® outputs
- Bi-ampable with stereo/bridgeable power amps and variable 24dB/octave crossover
- Onboard compressor with variable ratio (1:1–10:1)
- 9-band graphic EQ
- 39.6 lb (17.9 kg)

Type : Hybrid
Number of Channels : 1
Total Power : RMS: 1600W @ 4 ohms Mono-Bridged, 2 x 900W ; Continuous: 1200W @ 4 ohms Mono-Bridged, 2 x 600W
Compression : Yes
EQ : 3-band (5-position Midrange), 9-band Graphic
Preamp Tubes : 3 x 12AX7
Inputs : 1 x 1/4", 2 x 1/4" (power amp)
Outputs : 3 x speakON, 4 x 1/4" (speaker), 4 x 1/4" (line, preamp), 1 x 1/4" (tuner), 2 x 1/4" (bi-amp), 2 x XLR
Effects Loop : Yes
Footswitch I/O : 2 x 1/4" (effects, graphic EQ/mute)
Footswitch Included : No
Cooling System : Internal Fan, Heatsink, Side/Rear Air Vents
Power Source : Standard IEC AC cable
Height : 5.6"
Width : 19"
Depth : 15.5"