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26th September 2011, 09:49 AM
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diyAudio Member
Join Date: Jul 2004
Location: Belgium-Europe
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JBL 6290 amplifier mods on Pcb
Hello to all,
I have 6290 amplifiers and some of them have extra components soldered on the Pcb. It looks like a later mod,some have a small pcb soldered containing a transistor and some resistors and others just a electroytic cap and some resistors. Some amps do not have any mod installed at all. Placement of the extra stuff seems to be at location of R13&R14 and R7&R6. Does anybody know if this is a official Jbl mod and does someone have some info on that? Many thanks in advance. E-mail :  email address removed 
Last edited by wintermute; 26th September 2011 at 10:12 AM. Reason: removed email address. |
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