The Blackstar HT-1 1W 1x8 Guitar Combo makes the biggest splash in one of the smallest packages with a push-pull amp design, dual channel design, and streamlined yet responsive single EQ knob. Based on the design of the HT-5 and ECC83 and ECC82 vacuum power tubes, the secret weapon here is Blackstar's Infinite Shape Feature (ISF) technology which allows for an entire palette of amp tone in a single 8" package.