The Ampeg SVT-VR Tube Bass Amp Head is a versatile and powerful bass amplifier that delivers up to 300 watts of unsurpassed quality. The preamp stage power selection and even rocker switches emulate the exact signall path tone and vibe of an early 1970s “Blue-Line” SVT head. If youre looking for that in-your-face Ampeg bass tone look no further than the SVT-VR authentic from its input jack all the way to its six 6550 output tubes. There are two channels each with both Normal and Bright inputs as well as Volume and Tone controls. The SVT-VR also offers Ultra-Hi and Bass Cut-Off/Ultra-Low switches on each channel while Channel 1 benefits from a 3-position Rocker switch for mid-tone control.