Blackstar HT-Boost Pure Valve Dynamics Tube Boost

HT Boost HT Boost Front View The HT-BOOST's guitar pedal's high voltage gain circuit is like adding two extra hot tube preamp stages to your amp. Unlike inferior battery powered products, you don't lose any precious dynamics or tone. Add to this an all-valve cut and boost tone section and a high level output, specially designed to drive your valve amp hard, and you have the ultimate boost pedal.  Includes power supply in photos.