Top Smarttek Deals & Price Drops for December 2025

Blackstar Unity Pro Bass Combo is 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 straightforward and powerful. 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. This is a certified refurbished product. Any Player, Any Sound Performance optimized, powerful. Unity’s deceptively simple controls allow you to quickly and easily mold and create your tone no matter the style. Choose from 3 unique voices and response controls to uniquely shape the sound in your head. Ultimate Flexibility and Connectivity Push your creativity with built-in Chorus, Compression, and Octave effects all whilst being the perfect unit for both studio and stage with a balanced XLR, USB connectivity, and more. The Sound in Your Head Offering Classic, Modern, and Flat voicings, Unity bass is perfect for playing any style. Classic offers a Valve-Inspired growl with a Vintage EQ, Modern offers High-headroom dynamics and advanced EQ and Flat provides a flat signal that's clean and transparent. Unique Response Control Unity’s unique response control adapts 3 power amp stages to shape compression and feel. Linear response is powerful and articulate, 6L6 packs the compression and punch of 6L6 power valves and 6550 creates the dynamics and headroom of high power 6550’s. Overdrive Options Adding to Unity's array of features, the amp comes with 3 different overdrives all with a user-controlled blend. Overdrive offers a smooth, open, and harmonically rich tone. Distortion provides balanced, pedal-like power and Fuzz creates in-yours-face classic bass fuzz. Versatile Effects Enhance your tone even further with Unity’s built-in Chorus, Compressor, and Octaver effects. Pro Connectivity Perfect for any occasion, studio or stage Unity Bass is perfect for any musical environment with balanced XLR and USB connectivity and more. Extended Your Set Up The Unity U2250ACT 1 x 15-inch Active cab adds 250 Watts of extra stage power to any Unity Combo.