From Blackstar:

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 totally flat signal that's clean and transparent.

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.

Adding to Unity's array of features, the amp comes with 3 different overdrives all with a user-controlled blend. Overdrive offers smooth, open and harmonically rich tone. Distortion provides balanced, pedal-like power and Fuzz creates an in-your-face classic bass fuzz.

• 60 Watts
• Custom designed 10inch Speaker
• 3 Voices – Classic, Modern, Overdrive
• 3 band EQ with semi-parametric Mid
• Footswitchable Overdrive and Chorus
• Compressor
• Input Gain with clip indication
• Pad Switch for active / passive instruments
• Master Volume
• Link to Unity Bass Series Active Cabinet
• MP3 / Line in
• XLR + ¼inch Line Out / Headphones with independent level control