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Music Man HD130 212 maintenance
6. May 2016
12:18
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direstrat
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Hello,

My November 1978 Music Man 130HD 212 amp has shown some signs of weakness. So I decided to perform some maintenance operations on this old beautiful amp. Please find here some pictures and discussions on this topic.

Thanks

Direstrat

6. May 2016
14:14
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Rear Panel

rear_panel-1.JPG

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6. May 2016
15:20
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direstrat
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This speaker is an orignal Eminence speaker. This type is A-12G/HD with a 28oz magnet and 2½” voice coil. This model was stock in the 1978 serie of 212HD 130 combos. The ‘A’ stands for Alnico, the ‘G’ stands for guitar. This G/HD version is listed as 6lbs.

rear_speaker.JPG

37 years of dust must be clean…

dust_speaker.JPG 

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6. May 2016
16:06
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direstrat
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One question to MM HD130 combo’s owners : Have you the same wheel supports on your combo ?

wheel-support-1.JPGwheel-support-2.JPG

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3. July 2016
19:31
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direstrat
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And now, this is time to verify some voltages to sound like DS during the end of the 70’s ! 😉

adjust-bias-installation-1.JPG

Direstrat

28. August 2016
12:08
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After 4 months of maitenance, the magic sound of MM 212HD130 is back ! 🙂

Direstrat

restored.JPG
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