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In Reply to: RE: Gershman A-G crossovers - pic posted by hahax@verizon.net on February 22, 2021 at 20:37:53
"Moving crossovers outside the speaker reduces microphonics in the crossover which can be significant. It will be interesting especially moving the crossover from being near to the woofer. The magnetic field of a near by magnet can affect the values of inductors."
Good call!
If this were mine, I would attempt to find the schematic. I see iron core inductors and other low grade parts. When I was using Altecs, I reproduced the crossover using high quality parts and mounted them in boxes behind the speakers.
Follow Ups:
I thought about contacting Gershman about the schematic but decided to keep things simple. They sound very good as they are. But the negative aspects I listed in my original post were always on my mind while sitting in the sweet spot.
Speaking of the sweet spot, when I bought these speakers we were in a different house. My system was in the family room, allowing me to listen casually as well as critically year round. My system now resides in a semi-dedicated room upstairs and down the hall over the 2-car garage. I like the isolation of the room, but I don't like the isolation.
Most of my listening is done during the winter months. I literally go a month without firing the system up during the warmer, more pleasant months. I'd rather be doing yard work or hanging out by the pool. My point being, if I was listening more frequently I would put a little more effort into this refurb.
My long-term goal is to move on to something different. And preferably new. I got into this hobby in early 2000 and that was the only time I purchased a new pair of speakers. All my gear since then has been used except for the Cary 303/300 cdp and my most recent purchase of a Zero Zone tube preamp. I'd like to treat myself to a new amp and speakers and enjoy them for the next 20 years without the worry of re-capping, etc. But that won't happen for at least a couple of more years.
Not naming names but a friend of mine designed a crossover for a well known speaker manufacturer and he complained it didn't work. When he sent a picture of what he built from the plans the crossover was mounted on the woofer magnet.
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