The HT-BOOST's guitar pedal's high voltage gain circuit is like adding two extra hot valve 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.
All the Blackstar pedals operate on 300VDC anode supply voltage (H.T. voltage).
Two separate outputs provide one level for pedals and an extra dynamic high level for the HT-BOOST.
100% all-valve gain just like adding two extra hot valve stages to your amp.
The all valve 'cut and boost' equalisation circuit makes the tone controls have an extremely natural feel.