Celestion Heritage G12M 15 ohm 55Hz Blackback 12″ Guitar Speaker
Explore the legendary Celestion Blackback—this reissue of iconic 1970s variation of the classic Celestion Greenback guitar speaker. Known for their distinct black magnet covers, original vintage models (produced between 1975 and 1979) and the available now the Heritage Series G12M (55) deliver the ultimate blend of punchy low-end, warm mids, and biting high-end.
Whether you’re searching for the rare G12M T1511 55Hz cone for your guitar cab or looking at modern Blackback reissue options, discover how these legendary 25W guitar speakers define classic rock tone. Compare specs, find original models for sale, or explore the Celestion Heritage reisssue today!
| Specification | |
| Nominal Diameter | 305 mm / 12 in |
| Power Rating | 25W |
| Rated Impedance | 15 ohm |
| Sensitivity | 96 dB |
| Chassis Type | Pressed steel |
| Magnet Type | Ceramic |
| Magnet Weight | 0.99 kg / 35 oz |
| Voice Coil Diameter | 1.75 in / 44.5 mm |
| Voice Coil Material | Round copper |
| Frequency Range | 55 Hz – 5000 Hz |
| Resonance Frequency (Fs) | 55 Hz |
| Mounting Information | |
| Cut-out Diameter | 283 mm / 11.1 in |
| Diameter | 309 mm / 12.2 in |
| Magnet Structure Diameter | 150 mm / 5.9 in |
| Mounting Hole Dimensions | 7.9 mm / 0.31 in |
| Mounting Hole PCD | 297 mm / 11.7 in |
| Number of Mounting Holes | 4 |
| Chassis Depth (inc. gasket) | 91 mm / 3.56 in |
| Magnet Depth | 39 mm / 1.54 in |
| Overall Depth | 130 mm / 5.1 in |
| Unit Weight | 3.6 kg / 7.9 lb |
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