Blackstar Unity 250 Bass Combo Amplifier (250 Watts, 1x15")

Loaded with tons of features, the versatile Unity 250 is ready to shake the house down. Choose from three different overdrives to really push your limits.

A super versatile amp that is straight forward and powerful - the Blackstar Unity 250 Bass Combo Amplifier’s deceptively simple controls allow you to quickly and easily create your tone no matter what style you play.

Offering Classic, Modern and Flat voicings, Unity Bass is perfect for any playing style

- Classic: Valve-inspired growl with Vintage EQ
- Modern: High-headroom dynamics and advance EQ
- Flat: Totally flat, clean and transparent

A unique response control with 3 power amp stages to shape compression and feel

- Linear: Powerful and articulate – let your playing do the talking
- 6L6: Compression and punch of 6L6 power valves
- 6550: Dynamics and headroom of high power 6550’s

3 different overdrives with user-controllable blend

- Overdrive: Smooth, open, harmonically-rich overdrive
- Distortion: Balanced pedal-like distortion
- Fuzz: In-your-face, full-on fuzz


Enhance your sound with built in Chorus, Compressor and Octaver.

Unity Pro Woofer

Unity Pro Bass System features Eminence Opus speakers, designed and voiced in partnership with Eminence - the professional choice for bass players around the world.

Pro Connectivity

UNITY Bass is perfect for the studio or stage with the balanced XLR, USB connectivity and more.


- 250 Watts
- Custom designed Eminence 15" Opus Speaker
- 3 Voices – Classic, Modern, Flat
- 3 Footswitchable Drives read more 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
WARNING: Cancer and Reproductive Harm -
read less

- MP3 / Line in
- XLR + 1/4" Line Out / Headphones with independent level control
- D.I. / cabinet emulated line outputs
Dimensions and Weight in Packaging
Base Item
Shipping Weight: 55.75 lbs
Shipping Dimensions: 26 x 24 x 19 in
Manufacturer Part Number (MPN): BASSU250
Shipping Weight: 52.47 lbs
Shipping Dimensions: 24 x 22 x 17 in
Manufacturer Part Number (MPN): BASSU250

For support or warranty questions, please contact the manufacturer:
Phone: 631-390-8737

Reviewers gave this product an overall rating of 5 out of 5 stars. (1 ratings)
Submitted August 23, 2018 by Paul Stewart in Winfield, IL
"Blackstar Unity 250 Bass Combo Amplifier"
Overall: 5 out of 5 stars
Verified Customer zZounds has verified that this reviewer made a purchase from us.
Blackstar has raised the bar on bass combo amps. The construction is second to none, and it's loaded with effects that leave all the other manufacturers in the dust. Good luck Ampeg and Fender. You guys better think of something fast, because Blackstar is the one to beat now.
Musical Background:
I've been playing bass for 25 years.
Musical Style:
I play progressive hard rock.
8 of 10 people (80%) people found this review helpful. Did you?
Thanks for your opinion!