The ID:30 contains many of the unique features of the larger ID Series models. Blackstar's True Valve Power offers six distinctly different power valve responses. When engaged it delivers the response, dynamics, sag and break-up characteristics of a valve amp. The patented ISF control allows you to infinitely adjust the response of the tone control network between any of the traditional voicings. Deep editing and storing of patches is simple using the supplied Blackstar GUI software. USB connector also allows you to record your amp directly to your computer or to re-amp guitar tracks. Features a 12" speaker.