Tube Head for Electric bass50th Heritage Special EditionChannel 1 corresponds to the 1969 modelChannel 2 is based on the sound of mid-70s SVT modelsPower: 300 wattsImpedance: 2 and 4 ohmPreamp tubes: Two 12AX7Driver tubes: One 12AX7, two 12AU7Power tubes: Six 6550Controls for gain, master, bass, treble, mids5-position parametric midrange control: 220, 450, 800, 1600, and 3000 HzPassive tone stackBalanced DI outPower amp inputPreamp outputSlave outputBIAS settingWooden housingDimensions (W x H x D): 61 x 29 x 33 cmWeight: 36.3 kgMade in USA