Blackstar Amplification is a UK-based manufacturer of guitar amplifiers and effects, largely made up of ex-Marshall employees. Their products include the hand-wired, boutique "Artisan" series, the Series One series, and a range of pedals and amplifiers in the HT line. In 2009 they began operations in the United States.
Blackstar's HT pedals are a line of five different pedals, all boost, overdrive, or distortion units. All the pedals are valve powered and incorporate the ISF feature. Like the HT-5, the pedals have an emulated speaker output, allowing for direct recording. As of March 2010, Blackstar had introduced a new line of HT pedals, which feature three effects: Reverb, Delay, and Modulation. These pedals are, like the other HT line, all powered by a valve.