I'm not feeling the love... :-)
Seriously, is there anyone here familiar with SR-3's or did I make a mistake buying too old? I'm "vintage" myself so I like my equipment to come from the same era.
Is this a known problem with one earspeaker fading out each time it is used?
I would suspect that the bias board inside the SRD-5 energizer box has some faulty components
that cause the problem you describe. If possible, I would test your SR-3 cans on another suitable
amp or energizer box to verify if they are ok. DO NOT open the energizer box unless you are well versed
on working with high voltage. The SRD-5 can hold a deadly charge inside even when it is turned off and unplugged.
Most people "in the know" have these old (~20 to ~50 y/o) systems serviced - that is, updated with new components,
electrolytic capacitors, diodes and possibly resistors before placing them into service again.
Here are some links that may be of some interest:
Edited by livewire - 11/25/12 at 11:36am