T1220 Celestion G12M Greenback 12" 8ohm 25w Speaker


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The original G12M of the 1960s was Celestion’s first guitar speaker to use a ceramic magnet and paved the way for high power guitar amplifiers. The G12M uses a medium weight magnet to produce a sound that is smooth and warm but bright enough to hold its own against any rock backline.

Known simply these days as the ‘Greenback’, the G12M’s fabled ‘brown tone’ is characterised by a warm, controlled low-end, a rich, vocal mid-range and a delicate, detailed top-end. Loaded into a 4x12 and driven hard, these speakers exude warm, crunchy chords and sweet searing single-notes.


Chassis type - Pressed steel
Frequency range - 75-5000Hz
Magnet type - Ceramic
Magnet weight - 35oz, 0.99kg
Nominal diameter - 12", 305mm
Nominal impedance - 8 Ohm
Power rating - 20Wrms
Sensitivity - 96dB
Voice coil diameter - 1.75", 44.5mm
Voice coil material - Round copper