This Ampeg Svt Vr head amplifier is the perfect choice for any bass guitar player who wants to achieve that classic sound. This versatile and powerful bass amplifier delivers up to 300 watts of unsurpassed quality, offering the classic vibrance of tubes, as well as contemporary features. Preamp: Tube (3 x 12AX7, 2 x 12AU7) Driver Tube(s): 1 x 12AX7, 2 x 12AU7 Power Amp: Tube (6 x 6550) RMS Power Output: 300-Watts @ 2 ohms RMS Power Output: 300-Watts @ 4 ohms Tone Controls: Bass, Mid, Treble Mid Tone Control: 3-Position Rocker Switch Ultra Low/High Boosts: Yes Speaker Connections: Neutrik Speakon® and 1/4" Balanced Line Out: Yes (Transformer) Preamp Out/Power Amp In: Yes Dimensions (W x H x D inches): 24 x 11.5 x 12.75 Weight: 38.6 kg (85 pounds)