i've been sitting at my computer all day staring at a mathcad worksheet, trying see what i can do about the voigt pipe i built. i took a break, and decided to fix my sr-60s.
first one went well. the wire just broke outside the driver. had that fixed in under a minute.
second driver got complicated. i the wire broke right where it meets the voice coil. i took off the diaphram, but i couldn't see where the break was. i took out the microscope i used to use when i was 10 and stuck the diaphram and voice coil underneath. after a couple of hours of looking through the microscope i see a little silver dot. eureka! tried to fish the wire out with a pin, with no luck. so i removed a bit of the voice coil from the diaphram and then used the pin to get to the wire. success at last! unwound one loop of wire, solder, and glue the diaphram back in place. now we're rolling. everything's back to normal.
if anyone has a pair of broken grados lying around, i'd be glad to take 'em off your hand.