Celestion G12M Blackback 15R

Celestion G12M (55) Blackback – Classic 70s sound with legendary 55 Hz bass cone
The Celestion Blackback is a faithful reproduction of one of the most sought-after Blackback speakers from the 1970s. The model is based on the classic G12M design with the well-known 55 Hz "bass cone" that contributed to some of the most iconic guitar tones in rock history.

Associated with guitarists such as Paul Kossoff of Free, Blackback has become known for its warm sustain, rich midrange and characteristic combination of punch, clarity and musicality. The result is a speaker that delivers classic British guitar sound with both depth and dynamics.

Features
Faithful reproduction of the classic T1511 Blackback
55 Hz bass cone for rich lows and warm response
Characteristic midrange with clear presence
Classic ceramic magnet construction
25 W power tolerance
Ideal for vintage rock, blues and classic British amps
Available in 8 or 15 ohms
Sound character
The T1511 is characterized by a warm and full midrange with rich harmonic response. The bass register is deep and controlled thanks to the classic 55 Hz configuration, while the treble offers just the right amount of bite and clarity without being harsh.

This combination makes the speaker particularly suitable for expressive solo playing, dynamic crunch sounds and classic rock tones with long sustain.

Specifications
Size: 12”
Power handling: 25 W
Impedance: 15 Ω 
Sensitivity: 96 dB
Frequency range: 55 Hz – 5,000 Hz
Resonant frequency (Fs): 55 Hz
Chassis: Pressed steel
Magnet type: Ceramic
Magnet weight: 0.99 kg (35 oz)
Voice coil: 1.75” (44.5 mm) round copper
Nominal diameter: 305 mm
Cutout diameter: 283 mm
Overall diameter: 309 mm
Magnet diameter: 150 mm
Number of mounting holes: 4
Total depth: 130 mm
Weight: 3.6 kg