If you weren’t trying to sell them I’d say just seal the hole with silicone. When I was a dumb teenager with bump in the trunk this is what we did all the time. Because bass frequencies don’t need a ton of articulation you really just need it to hold together without buzzing so it can move air.
Update:
damn. That’s a nice piece- where’d you find if you don’t mind.
I was searching everywhere, ebay craiglist fb marketplace, audio sites. A friend who goes to estate sales sent me to a site that had a search feature. Ended up bidding on line for it. It looked in really great shape, original owner had passed. I was willing to go high because it was local pick up in long island. No dealing with shipping and possible damage. Inside it is mint, no repairs appear to have been done, not a single scratch or mark anywhere. It seems to play well, but really needs new electrolytic caps and all the contacts cleaned. This was my goal to have a restoration project. I will get some pics up during the disassembly and repair. There sure is something cool about these old receivers, just the way the look and light up, you dont have that with the newer black boxes. I recently rebuilt my 1978 JVC 401, (I bought brand new)put a ton of new parts in, along with modern op amps to replace IC's. The sound is better than ever. Thanks to youtube and the 'net there is a ton of how to info available. Even splurged for a solder station and desoldering gun.
That’s awesome.
I heard of the shows, that was high end audio, too expensive for this poor teenager. In the 80's I had a little more money. My first real high end speakers were accustat electrostatic. Had to sell due to divorce, and lack of space to set them up properly.
My father was really into it. "Forced" me to build my first Dynaco amp, pre-amp and tuner when I was 14 and just wanted a stereo like all my friends.
I built many Heathkits when I was a kid. Also built a Hafler 220 amp to power up the accustats. Those dynaco's are worth money today. David Hafler was part of Dynaco back in the day. I enjoy building the kits, way better than building a stupid car model, when your done it just collects dust.
FB marketplace had a lot of local items when I was searching. Shipping is a PIA, and the risk of damage. I'm not a member over there, so it was not an option for me.
All our old Dynaco is still in my parents basement. He also had a bunch of Perreuex. I have my Hafler in our spare bedroom. Had to give it up since my wife couldn’t figure it out. Using a Marantz AV receiver for the family now.
Craigslist is also a good option for local pick ups.
