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.
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.
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