Ampeg SVTVR Classic Series Vintage Reissue Tube Bass Amplifier Head, 300 Watt 2 x 12AX7 &amp; 1 x 12AU7 Preamp Tubes 6 x 6550 Power Amp Tubes 3 Position Mid Tone Rocker Switch Transformer Balanced Line Out Speakon &amp; 1/4" Speaker Connectors