Unity Pro Bass are the result of countless hours of technical research and benchmarking against the most iconic historic references. Designed from the ground up by bass players, for bass players they are straight forward and powerful. The new Unity Pro Bass System’s deceptively simple controls allow you to quickly and easily create your tone, with rock solid bass, detailed dynamics and innovative features in a compact package from 30 Watts to 500 Watts. Blackstar’s unique Response control allows the player to choose between the sound and feel of three classic power amp stages, shaping compression, natural drive and dynamics. Combined with three distinct preamp voicings and a 3-band semi-parametric EQ, Unity produces infinitely flexible bass tone and exceptional feel, whatever your playing style. The Unity 250ACT powered cabinet can be linked to any model in the line to add 250W or more of active power to your rig; taking you from the studio or rehearsal room to the gig with ease and portability. From the organic response of classic valve amps, to a transparent clean platform, Unity brings together the ultimate in bass tone. Features: 250 Watts, Custom designed Eminence 15'' Opus Speaker, 3 Voices – Classic, Modern, Flat, 3 Footswitchable Drives with user controllable blend – Overdrive / Distortion / Fuzz, 3-band EQ with semi-parametric Mid, Unique Response control – Linear, 6L6 and 6550, Footswitchable Chorus and Sub-Octave with adjustable level control, Compressor, Input Gain with clip indication, Pad Switch for active / passive instruments, Master Volume, Link to Unity Bass Series Active Cabinet, USB audio out for direct recording, Series effects loop, MP3 / Line in, XLR + ¼'' Line Out / Headphones with independent level control, D.I. / cabinet emulated line outputs.