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Celestion Heritage G12M (55) Blackback 25-watt 15-ohm Guitar Amp Speaker , $179.00 - Add to Cart Skip to Product Information

New Celestion Heritage G12M (55) Blackback 25-watt 15-ohm Guitar Amp Speaker

25W, 15-ohm, 12" Speaker with Ceramic Magnet and 55Hz Bass Cone
Item ID: G12M-5516
Celestion Heritage G12M (55) Blackback 25-watt 15-ohm Guitar Amp Speaker
In Stock!

Amp Replacement Speakers Are Not Returnable
Sorry, amp replacement speakers cannot be returned, so please call if you'd like help choosing.
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New Celestion Heritage G12M (55) Blackback 25-watt 15-ohm Guitar Amp Speaker
In Stock!

Amp Replacement Speakers Are Not Returnable
Sorry, amp replacement speakers cannot be returned, so please call if you'd like help choosing.

An Original Rock 'n' Roll Loudspeaker, Re-created

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Built from Celestion’s original blueprints of the era, the Heritage Series G12M (55) faithfully reproduces the 1970s, cranked-to-11 guitar loudspeaker tone of the original, beloved T1511 Blackback, the most celebrated variation of Celestion's Greenback speaker. With a lineage that can be traced back to Free's Paul Kossoff and Hendrix, this speaker is favored among many vintage tone connoisseurs for its 55Hz resonant frequency bass cone. This choice of bass cone emits a warmer, full-bodied tone compared to the Pulsonic cones of the Greenbacks, with plenty of punch to your high-powered amp. Its classic 25-watt power rating breaks up exactly how Sweetwater’s tone gurus expect a vintage speaker to react — with rich overdrive and singing sustain. While the origin story of the “black back” may have been lost in time, you can rest assured that the Heritage Series G12M (55) Blackback will deliver an authentic classic rock sound to your rig for years to come.

Celestion Heritage G12M (55) Features:

  • 12-in. direct guitar speaker replacement based on Celestion’s original formula of the T1511 loudspeaker
  • 25W power rating delivers vintage-style power for your favorite amp
  • 55Hz resonant-frequency cone projects a warm sonic character with a rich overdrive
  • 8-ohm or 15-ohm impedance
  • Made in the UK

Warranty Info

Sweetwater's FREE 2-Year Total Confidence Coverage Warranty

Extra peace of mind at no extra cost.

  • Save money with FREE parts and labor
  • Get back to making music with the industry's fastest turnaround time
  • Fix it the first time with our award-winning, factory-certified Service Department
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Offer applies only to single-receipt qualifying purchases. Select manufacturers may require that only the manufacturer’s products qualify towards the minimum purchase amount needed to be eligible for promotional financing. Otherwise, an invoice that meets the minimum purchase amount and contains at least one qualifying manufacturer product is eligible for promotional financing. No interest will be charged on promo purchase balance, and equal monthly payments are required on promo purchase until it is paid in full. The payments equal the amount financed divided by the number of months in the promo period, rounded up to the next whole dollar. These payments may be higher than the payments that would be required if this purchase was a non-promo purchase. During the last month(s) of the promo period the required monthly payment may be reduced due to the prior months’ rounding. Regular account terms apply to non-promo purchases. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

Offer applies only to single-receipt qualifying purchases. No interest will be charged on the promo balance if you pay it off, in full, within the promo period. If you do not, interest will be charged on the promo balance from the purchase date. The required minimum monthly payments may or may not pay off the promo balance before the end of the promo period, depending on purchase amount, promo length and payment allocation. Regular account terms apply to non-promo purchases and, after promo period ends, to the promo balance. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

The estimated required monthly payment shown which excludes taxes and delivery equals the amount financed divided by the number of months in the promo period, rounded up to the next cent. During the last month(s) of the promo period the required monthly payment may be reduced due to this rounding. These payments apply only with the financing offer shown. If you make these payments by the due date each month, you should pay off this amount financed within the promo period, if it is the only balance you are paying off. If you have other balances on your account, this payment will be added to any other minimum monthly payments.

Applies only to select items from this manufacturer. Ask your Sweetwater Sales Engineer for more details.