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Blackstar Unity Bass U500 2x10-inch 500-watt Bass Combo Amp

500-watt, 2 x 10" Bass Combo with 3 Voicings, Overdrive, 3-band EQ, Compression, Chorus and Sub-octave Effects, USB, and MP3/Line In
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Item ID: UnityBass500
Blackstar Unity Bass U500 2x10-inch 500-watt Bass Combo Amp
$40 Price Drop!
Lowest price in 90 days
Price:$759 and 99 cents
Original price, crossed out: $799 and 99 cents
Special Financing - Ends Aug 2, 2026. $22/month with 36 month financing*

We Can Get It!

While this isn't an item we normally stock, we can still get it due to our great relationship with Blackstar. Go ahead and place your order and we'll follow up shortly to let you know when to expect it. Estimated July 2026.

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Blackstar Unity Bass U500 2x10-inch 500-watt Bass Combo Amp
We Can Get It!
Price:$759 and 99 cents
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Built for Tonal Flexibility

The Blackstar Unity Bass U500 bass combo amplifier was built for tonal flexibility. Switch between three power amp stages via the U500's Response control to shape your compression, natural drive, and dynamics. Choose between three distinct preamp voicings, and then sculpt the result with a 3-band EQ. Increase your bass's punch, depth, and low end, with compression, chorus, and sub-octave effects. The U500 is loaded with enough connectivity for live, studio, and home use. And if you want to beef up your output onstage, you can add a Unity U250ACT powered cabinet for an extra 250 watts of power. Get the eminently versatile Unity Bass U500, and everything from valve grind to high-headroom clean will be within your grasp.

Everything from valve grind to high-headroom clean

Whatever sound is in your head, you can coax it from the Unity Bass U500. It all starts with Blackstar's unique Response control, which gives you the choice of three classic power amp stages: Linear, 6L6, and 6550. You also get three distinct preamp voicings: Classic, Modern, and Flat. The U500's Drive section is loaded with three overdrives — OD, Distortion, and Fuzz — with a user-controllable blend. Beyond that, a 3-band EQ with a semi-parametric Mid knob supplies you with plenty of sound-sculpting power. Need more punch, depth, or low-end muscle? No problem. The U500 features built-in compression, chorus, and sub-octave effects.

Loaded with useful features for stage and studio

The Blackstar Unity Bass U500 is packed to the gills with useful features. Connectivity abounds, with an XLR + 1/4" line output and a headphones output with independent level control. A -10dB pad accommodates both active and passive instruments. And an MP3/line input is onboard to supercharge your practice sessions. Integrate your pedals and external processors with the built-in effects loop. A cabinet-emulated line output and USB audio output make DI recording a breeze. The bassists here at Sweetwater are especially impressed by the U500's integrated link for Blackstar's Unity U250ACT powered cabinet, which allows you to add an extra 250 watts of power to your rig.

Blackstar Unity Bass U500 Combo Amp Features:

  • 500-watt, 2 x 10" bass combo with Eminence Opus speakers
  • Response control gives you the choice of 3 classic power amp stages — Linear, 6L6, and 6550
  • 3 distinct preamp voicings — Classic, Modern, and Flat
  • Drive section is loaded with 3 overdrives — OD, Distortion, and Fuzz — with a user-controllable blend
  • 3-band EQ with semi-parametric Mid knob supplies you with plenty of sound-sculpting power
  • Compression, chorus, and sub-octave effects for increasing your punch, depth, and low-end muscle
  • Series effects loop for integrating your pedals and external processors
  • Integrated link for Unity U250ACT powered cabinet adds an extra 250 watts of power to your rig
  • XLR + 1/4" line output and a headphones output with independent level control
  • Cabinet-emulated line output and USB audio output make DI recording a breeze
  • -10dB pad accommodates both active and passive instruments
  • MP3/line input for supercharging your practice sessions
  • Ground lift for eliminating unwanted noise

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Tech Specs

  • Type: Solid State
  • Number of Channels: 1-channel, 3 x voices, 3 x drives
  • Output Power: 500W
  • Speakers: 2 x 10" Custom Eminence Opus speaker
  • Effects: Chorus, Sub-Octave
  • Compression: Yes
  • EQ: 3-band EQ with Mid Frequency
  • Amp Modeling: Linear, 6L6, 6550 power models
  • Inputs: 1 x 1/4", 1 x 1/8" (mp3/line in)
  • Outputs: 1 x 1/4" (line out/headphones), 2 x XLR (DI, cab)
  • Headphones: Yes
  • Effects Loop: Yes
  • Footswitch I/O: 1 x 1/4" (overdrive/effect)
  • Footswitch Included: Yes, 2-button Footswitch
  • USB: 1 x Type Mini-B
  • Power Source: Standard IEC AC cable
  • Height: 24"
  • Width: 19"
  • Depth: 14.2"
  • Weight: 48.5 lbs.
  • Manufacturer Part Number: BASSU500

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Reviews

Wow
Fantastic bass amp.
Very versatile and sound is great.
Powerful enough for small and mid-sized shows, especially with the U250ACT extension cab.
I am thoroughly impressed.
The octave effect is not the best but I rarely use octave so no big deal for me.
Highly recommended.
Great combo, no complaints, get one!
This combo has it all. It is built like a tank, it oozes quality with its look and feel and most importantly, tone. The price/weight/power/feature ratio is unbeatable. This combo looks, feels and sounds like something much bigger that would carry a boutique price tag.
I come from the Ampeg, GK, Ashdown big-rig world, I needed a combo for grab-n-go kind of stuff...I've owned many, including Ampeg, GK, Ashdown, TC and Peavey and the Blacksatar U500 beats them all in every way. I highly recommend it.
FYI - I'm a lifelong bass player, I play metal and I'm in my mid 50's.
Big nod to my rep, Henry Moore...he never gives me a reason to buy anywhere else and always makes it work.
Blackstar unity 500
Great bass amp with a lot of power. Blackstar is a great company. I've used a few of there guitar amps as well. Cheap and great.
Music background: All for fun
Awesome
We"ve used this amp on a few gigs now with my band. TONS of power. Great clarity and depth at the same time. Some good usable effects. You really can"t go wrong with this amp.
Monster Bass Rig !
I waited 4 months for this amp and it was more than worth the wait . I've used a lot of bass rigs over the last 40 years and this is a monster. There are many really good combo rigs out there , but this is one I will never grow tired of and I think you will also feel this way if you play one . Most of my gigs are 200 seat rooms without me going DI and I have to turn down , that says a lot . No need to break down all the features , everything you hear/read is spot on .
Music background: Studio/Stage