I recently got a Marshall JCM2000 DSL401 in the shop for repairs. This amp is equipped with a 12 inch Celestion speaker labeled GOLD BACK. On a side label you can find the G12T-100 markings tho.
Checking to see if the problem wasn’t with the speaker itself i measured it and got the T/S parameters and impedance curve. Subscribers will find that zma and frd files are available.
Parameters (pdf): celestion g12t-100
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