Marshall 1990 JCM900 4501 Combo
Partial restoration of a 1990 Marshall JCM900 4501 combo with a twist. Loss of negative DC bias voltage during testing. On the fly diagnosis and repair. Electrolytic capacitor replacement, potentiometer replacement and tube replacement. MENDITTO AMPLIFICATION [email protected] mendittoamps.com MAGGIO MUSIC CENTER 8403 18th Ave, Brooklyn, NY 11214 Phone: 718-259-4468 maggiomusicschool.com
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