Celestion G12M Greenback 12″ Speaker


Celestion’s first guitar loudspeaker featuring a ceramic magnet structure

The G12M ‘Greenback’ presented almost as much magnetic flux to the voice coil as an Alnico formulation, but in a much more compact space. As a result the Greenback became the guitar loudspeaker that paved the way for use with higher power amplifiers, and of course, the ceramic magnet presented its own unique tonal characteristics.


The Greenback has a loud and assertive character that sounds great through a valve amp pushed into overdrive. The speaker has evolved over the decades and still presents that instantly familiar woody tone, delivered with a knockout punch. With its well-controlled low-end it can be used singly in low-powered amps, or in multiples for high-power rock heads. It’s an ideal speaker to bring drive and definition to modern high gain amps.



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Specifications: • Nominal diameter: 12″ (305 mm) • Power rating: 25 watts • Sensitivity: 98 dB • Chassis type: Pressed steel • Voice coil diameter: 1.75″ (44.5 mm) • Voice coil material: Round copper • Magnet type: Ceramic • Frequency range: 75-5,000 Hz • Fs: 75 Hz • DC resistance.

Mounting Information: • Diameter: 12.2″ (309 mm) • Overall depth: 5.1″ (130 mm) • Magnet structure diameter: 5.9″ (150 mm) • Cut-out diameter: 11.1″ (283 mm) • Mounting slot dimensions: 0.31″ (7.9 mm Ø) • Number of mounting slots: 4 • Mounting slot PCD: 11.7″ (297 mm) • Weight: 7.9 lbs. (3.6 kg).

Weight 10 lbs
Dimensions 12 × 12 × 6 in