Blackstar Unity 500 Bass Combo Amplifier (500 Watts, 2x10")

With 500 watts of power on tap, you'll fill any venue with a huge bass sound. This versatile beast features 3 different voicings to suit any playing style.

A super versatile amp that is straight forward and powerful - the Blackstar Unity 500 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 6550s

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.


- 500 Watts
- Custom designed Eminence 2 x 10" Opus Speakers
- 3 Voices -- Classic, Modern, Flat
- 3 Footswitchable Drives with user controllable blend • Overdrive / Distortion / Fuzz
- 3-band read more 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 -
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- MP3 / Line in n 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: 60.75 lbs
Shipping Dimensions: 27 x 24 x 19 in
Manufacturer Part Number (MPN): BASSU500
Warehouse Resealed
Shipping Weight: 60.75 lbs
Shipping Dimensions: 27 x 24 x 19 in
Manufacturer Part Number (MPN): BASSU500

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. (2 ratings)
Submitted July 28, 2021 by a customer from

"I think its great"

Overall: 5 out of 5 stars
(see rating details)
Verified Customer zZounds has verified that this reviewer made a purchase from us.
I find this combo amp to be perfect. The built in effects are fine, have had zero issue with them, the octave effect is meh, but the chorus is decent, and the fuzz has some real growl to it, I got the control pedal for ease of use. Dominates the practice space if I turn up, I also use the powered 15" extension cab, which if you got the cash I recommend highly. good amp, worth the money
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