Analogean Posted September 14, 2016 Report Share Posted September 14, 2016 Hello, picked up a 12" woofer today. Looks like it could be a guitar speaker, maybe celestion. Only identifying element is the # on the chassis, KM22 T2975, and a number on the cone, 2877. The magnet is very heavy with a vent in the middle and three machined craters. Also on the rim is stamped "made in England". I would like to find out what the specs are for this beast and maybe use it in a guitar box. Thanks... Link to comment Share on other sites More sharing options...
Analogean Posted September 21, 2016 Author Report Share Posted September 21, 2016 So, I did some more digging, according to the bygonetones website, which has some very useful reference lists, the T2975 is a Celestion 8 Ohm G12-125 which has 125 watts power and was used in the Marshall 2150 combo. The date is determined by the KM22 stamp which stands for K=October, M=1979, and 22 is the 22nd of the month. I still have not found any info on the 2877 cone code, and most celestion cones are ribbed. Also the circular stamp with the C in it is unusual, but might stand for cloth treated surrounds. I have sent an email to bygone tones and hope to get some clarification. Link to comment Share on other sites More sharing options...
Analogean Posted September 23, 2016 Author Report Share Posted September 23, 2016 So, bygone tones referred me to dr decibel at Celestion speakers and he has confirmed that it is a celestion G12-125 8 ohm with cloth edge surrounds. Link to comment Share on other sites More sharing options...
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