Before buying any speaker, check that the screw mount pattern and the overall depth will fit your cabinet / combo.
Follow our Installation guide to open it up.
Speakers are non-returnable, so if in doubt, please contact us for advice!
Screw Mount Pattern
Most amps with a 12" speaker have a compatible pre-drilled screw pattern, especially the British makes, eg. Marshall, Vox, Blackstar, Orange, etc.
Celestion speakers have a screw hole diameter of 7.9mm, and Pitch Circle Diameter (PCD) of 296.8mm (ie. the distance between the centres of two directly opposite holes).
Note that you can install a 4-hole speaker into an 8-hole pattern, by simply ignoring the additional unused holes. This will not compromise speaker performance.
This is the speaker's full front-to-back length (diagram below).
The overall depth of the Ceramic speakers fits most cabinets and combos.
Alnico models are deeper however, and may not fit in some cabinets, for eg. Fender Blues Junior.
Remember to check clearance from the amp tubes as well.
Refer to the table and diagram below to check the suitability of your amp / combo.
|Blue, Gold and Cream||6.5", 165mm|
|G12M Greenback||5.1", 130mm|
|G12H Anniversary||5.3", 135mm|
|G12M-65 Creamback||5.1", 130mm|
|G12H-75 Creamback||5.4", 138mm|
|Vintage 30||5.3", 135mm|