Blackstar Unity Bass Pro System 1x15" 250-Watt Active Bass Extension Cabinet

Msrp: $579.99 / Savings: $130.00

Or just $19 per month*0% Interest for 24 Months**

On select purchases $299 or more with your Sam Ash card now thru 12/31/21.

24-equal monthly payments required.

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0% Interest for 24 Months

On select purchases $299 or more with your Sam Ash card now thru 12/31/21. 24-equal monthly payments required.

*See details below.

**See monthly payment details below.

*Offer applies only to single-receipt qualifying purchases of these qualifying brands: ABELTON, AKAI, AKG, ALESIS, ALLEN & HEATH, ALTO, AMERICAN DJ, AMPEG, ANTELOPE AUDIO, ARTURIA, AZUMI, B.A.C., B&S, BACH, BESSON, BOSE, BOSS, BREEDLOVE, BUFFET CRAMPON, CARLO ROBELLI, CARLSBRO, CASIO, CHAUVET DJ, CORDOBA, CROWN, DBX, DENON, DIGITECH, DRUM WORKSHOP, ELECTRO-VOICE, EPIPHONE, ESP, FISHMAN, FOCAL, FOCUSRITE, GATOR, GIBRALTAR, GIBSON, GIBSON CUSTOM, GODIN, GROOVE PERCUSSION, GUILD, HAGSTROM, HARTKE, HEADRUSH, HOHNER, HORA, HOTONE, IBANEZ, IZOTOPE, JBL, JEAN BAPTISTE, JODYJAZZ, JUPITER, KAT, KAWAI, KRAMER, KRK, KURZWEIL, LANIKAI, LATIN PERCUSSION, LEXICON, LINE 6 LUDWIG, M-AUDIO, MACKIE, MARANTZ, MEDELI, MICHAEL KELLY, MOOG MUSIC, MOTU, NEUMANN, NORD, NOVATION, NS DESIGN, NUMARK, ORANGE AMPLIFICATION, OVATION, P.MAURIAT, PAISTE, PDP, PEAVEY, PIONEER DJ, POWELL, PRESONUS, PRS, QSC, RAINSONG, RANDALL, RANE, RME, ROLAND, SABIAN, SAMSON, SCHECTER, SELMER, SELMER PARIS, SELMER USA, SENNHEISER, SONOR, SOUNDCRAFT, STERLING BY MUSIC MAN, SUPRO, TAKAMINE, TAMA, TASCAM, TAYLOR, UNIVERSAL AUDIO, WARM AUDIO, WARWICK, WASHBURN, YAMAHA, YANAGISAWA, ZILDJIAN. No interest will be charged on promo purchase and equal monthly payments are required equal to initial promo purchase amount divided equally by the number of months in promo period until promo is paid in full. The equal monthly payment will be rounded to the next highest whole dollar and may be higher than the minimum payment that would be required if the purchase was a non-promotional purchase.  Regular account terms apply to non-promotional purchases.  For new accounts: Purchase APR is 29.99%; Minimum Interest Charge is $2. Existing cardholders should see their credit card agreement for their applicable terms. Subject to credit approval.

**Monthly payment shown is equal to the purchase price excluding [taxes and delivery] divided by the number of months in the promo period, rounded to the next highest whole dollar, and only applies to the selected financing option shown.  If you make your payments by the due date each month, the monthly payment shown should allow you to pay off this purchase within the promo period if this balance is the only balance on your account during the promo period.  If you have other balances on your account, this monthly payment will be added to the minimum payment applicable to those balances.

Qualifying items must be purchased at the advertised tagged prices. This offer is not valid for price matches, competitor coupon matches, used or previously marked down items, closeout gear or door busters.

Seen a better price?
Add 250 Watts of extra stage power to any Blackstar Unity Combo Amp with the Blackstar Unity Bass Pro System 1x15" 250-Watt Active Bass Extension Cabinet.
In Stock & Ready To Ship!

Sam Ash Gear Shield Extended Service Plans

Maximum Protection at Minimal Cost

2 and 3 Year "No Hassle" Extended Warranty Coverage to repair or even replace* your gear so you won't miss a beat!


  • Covers new and used gear
  • No Lemon Policy
  • 100% Parts and Labor Coverage
  • No Out Of Pocket Expenses or Hidden Fees
  • Transferable if you sell or give away your gear
  • Free shipping should you need a repair

Get The Best Back Back Up For Your Gear:

  • Power surge failures from day one: COVERED!
  • Wooden cracks in acoustic guitars: COVERED!
  • Defects to guitar headstocks, necks or bodies: COVERED!
  • Cracked wooden drumshells: COVERED!
  • Mechanical breakdowns due to normal wear and tear: COVERED!
  • Electrical breakdowns due to normal wear and tear: COVERED!
  • Commercial use: COVERED!

*Replacement for new products costing less than $500. Download the full terms and conditions here

Sometimes you just need that extra energy to add to your set. Power up your sound with the Blackstar Unity Bass Pro System 1x15" 250-Watt Active Bass Extension Cabinet. Its custom designed speaker allows your sound to be heard with clarity and volume. Easily connect this to any Blackstar Unity Combo Amp to add a back-up boost to your performance, or create a chain with other Unity active cabinets.

Custom Designed Speaker
Carefully built into this model is a 15" Opus speaker. Custom designed in a Blackstar partnership with world renowned speaker producer Eminence, these speakers are built with quality and experience to service professional bass performances world-wide.   

Back-Up Boost
The Unity Bass Pro System 1x15" 250-Watt Active Bass Extension Cabinet contains a passive 1/4" input so you can use it as an extension cabinet with Blackstar's U30, U60, U120, and U500 bass amplifier models. Combined use with external preamps is also an option thanks to the Combined XLR + 1/4" Input.

Create a Chain
Using the XLR Through, you can chain together multiple Unity Active Cabinets to make your sound as full as you desire. This great feature allows you to adjust the sound to your liking and is very convenient for performances in a wide variety of settings. Two, three, four; the choice is all yours.


  • 250-Watt Cabinet with Custom Designed Eminence 15" Opus Speaker
  • Independent Volume Control
  • Combined XLR + 1/4" Input Allowing Use with External Preamps
  • Passive 1/4" Input for Use as a Standard Extension Cabinet
  • XLR Through to Chain Together Multiple Unity Active Cabinets
  • Power Cable Included

Get your Blackstar Unity Bass Pro System 1 x 15" 250W Active Cabinet today at the guaranteed lowest price from Sam Ash with our 45-day return and 60-day price protection policy.

Things You Will Get:

  • Extension Cabinet
  • Power Cable
  • Model Number BASSU250ACT
    Model U250 Active Cabinet
    Series Unity Bass Pro System
    High Frequency Driver No