That's all hot-glue used at the factory to keep everything still and from rattling about. It's a hell of a crossover. The board it's mounted to won't make it out of the 12" woofer's hole as it's wedged behind a cylinder encasing one of the mid drivers. I can't get that cylinder out without...
Clever use of tools.
I had to measure some exhaust pipe diameter recently. I took two ruler-squares and set them on opposite sides of the pipe and measured the distance between them.
I agree with JGale. Could easily be a loose tube / bad connection as opposed to microphonic.
Take 'em out and put them back in. I fixed the climate control on one of my cars by taking the fuse out, looking at it funny, and then putting it back in.
I'm revving up to do a replacement of the entire front end of a Hafler DH-200 audio amplifier, where there's a well documented and designed set of boards with a completely new circuit. Just keep the chassis, the power supply + caps, and the output mosfets.
With the projects you're doing, I see...
Yup, lots of vintage equipment available on Craigslist.
Speaker surrounds tend to go; amp capacitors tend to leak. But the difference in quality back before the cheap surround-sound boom of the mid nineties is amazing.
This board is 95% of the market for any sort of meaningful Hamer USA revival. Who else wants one ( or even remembers the brand?)
As much as the HFC loves the brand and the past, what this board's market wants is the build quality of Hamer USA and custom order possibilities in evolutionary...
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