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Celestion G12M Greenback
12" Guitar Speaker


The Celestion G12M Greenback is their first guitar loudspeaker featuring a ceramic magnet structure.
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Celestion G12M Greenback
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The Celestion G12M Greenback is their first guitar loudspeaker featuring a ceramic magnet structure. It presents 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.

Celestion G12M Greenback Specifications:

  • Chassis type: Pressed steel
  • DC resistance, Re: Available 6.7 Ohms or 13.1 Ohms
  • Frequency range: 75 Hz - 5 kHz
  • Magnet type: Ceramic
  • Magnet weight: 35 oz (0.99 kg)
  • Nominal diameter: 12" (305 mm)
  • Nominal impedance: Available 8 Ohms or 16 Ohms
  • Power rating: 25 Wrms
  • Resonance frequency, Fs: 75Hz
  • Sensitivity: 98dB
  • Voice coil diameter: 1.75" (44.5 mm)
  • Voice coil material: Round copper
  • Mounting Information:
    • Cut-out diameter: 11.1" (283 mm)
    • Diameter: 12.2" (309 mm)
    • Magnet structure diameter: 5.9" (150 mm)
    • Mounting slot dimensions: 0.31" (7.9 mm) Ø
    • Mounting slot PCD: 11.7" (297 mm)
    • Number of mounting slots: 4
    • Overall depth: 5.1" (130 mm)
    • Unit weight: 7.9 lbs (3.6 kg)

General Questions


Can I return a service part once it has been installed?


Installed service parts are non returnable, unless they are defective. All defective returns are exchange only - no money will be refunded.

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