The SVT-3PRO was designed by Ampeg engineers to deliver versatile and powerful performance, capable of a plethora of classic sought-after sounds at high volume. Packing a huge amount of tone-shaping options into it's compact 2U enclosure, the SVT-3PRO feature's Ampeg's iconic 5-way Midrange control, which allows you to select the center frequency of the midrange peak filter, along with shelving low-end and high-end filters. For those who require greater control, the SVT-3PRO also features a nine-band graphic EQ with frequencies that have been carefully selected for their tonal characteristics. The graphic EQ can even function as a 'second channel' when a footswitch is connected, giving you instant access to an alternate tone. Features 450 Watts 4 ohms/275 watts 8 ohms Tube Drive control 1/4 and Neutrik® speakON® outputs 9-Band graphic EQ Transformer-balanced XLR line out with level control Mute switch and Tuner output Hybrid Design With a hybrid tube/solid-state design, the SVT-3PRO offers players that signature fatness and warmth that made Ampeg the first choice for bassists all over the world - and more. Impressively powerful, incredibly versatile, and totally portable - this amp is everything the serious bass player needs - with no frills, and no compromises on sound quality.- it's no wonder it's found a home on big stages all over the globe. Specifications Output Power 450W RMS @ 4O, 3% THD 275W RMS @ 8O, 3% THD Signal-to-Noise Ratio: 80dB (20Hz-30kHz), ref: 1% THD+N into a 4O load with –20dB stimulus (“normal”) Max. Gain: 63dB @ 1kHz, Tone Controls Centered Tube Compliment Preamp: 3x 12AX7 Driver: 1x 12AX7, 1x 12AU7 Tone Controls Bass: +/-12dB @ 50Hz Middle: +/-15dB @220Hz/450Hz/800Hz/1.6kHz or 3kHz Treble: +14dB/-19dB @ 5kHz Graphic EQ Level: +/-10dB 33Hz: +/-8dB 80Hz: +/-8dB 150Hz: +/-8dB 300Hz: +/-8dB 600Hz: +/-8dB 900Hz: +/-8dB 2kHz: +/-8dB 5kHz: +/-9dB 8kHz: +/-10dB Tone Shaping Bright Switch: +6dB @ 2kHz Ultra Hi Switch: +6dB @ 5kHz Ultra Lo Switch: +2.5dB @ 50Hz, -12dB @ 560Hz, +1.5dB @ 5kHz Footswitch Jack Graphic EQ On/Off, Mute On/Off (Tip = Mute, Ring = EQ) Power  Power Requirements: 200-240V AC, 50-60Hz Power Consumption: 390W Dimensions 102mm (H) x 483mm (W) x 394mm (D) 11.8kg