Hi all.
I have a pair of Goodmans LS3/5A's which were not properly sealed around the terminal posts. Upon opening the speakers up to investigate I found a clump of hardened black goo covering the holes where the speaker terminal cables pass through. I suppose this was rubber which deteriorated and hardened---the substance was brittle but not brittle enough that it was easy to crack and tear away.
I've managed to remove the deposits from both cabinets but now I have a dilemma: how do I go about resealing these units? Clearly the original rubber seal wasn't a good choice: those two holes I'm trying to seal are aprox 10mm in diameter and are just there to allow the speaker cables though (these use the old screw type connectors (photo attached).
The first thing that came to my mind was silicone like that used to seal a bathtub but I really have no idea if that is appropriate or if it will breakdown the same way the original rubber did after a couple of decades.
All advice appreciated. Many thanks.
I have a pair of Goodmans LS3/5A's which were not properly sealed around the terminal posts. Upon opening the speakers up to investigate I found a clump of hardened black goo covering the holes where the speaker terminal cables pass through. I suppose this was rubber which deteriorated and hardened---the substance was brittle but not brittle enough that it was easy to crack and tear away.
I've managed to remove the deposits from both cabinets but now I have a dilemma: how do I go about resealing these units? Clearly the original rubber seal wasn't a good choice: those two holes I'm trying to seal are aprox 10mm in diameter and are just there to allow the speaker cables though (these use the old screw type connectors (photo attached).
The first thing that came to my mind was silicone like that used to seal a bathtub but I really have no idea if that is appropriate or if it will breakdown the same way the original rubber did after a couple of decades.
All advice appreciated. Many thanks.
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Allow the silicone sealant to dry for several days before reinstalling the front baffles.
The solvent in the silicone could damage the drivers or crossover.
The solvent in the silicone could damage the drivers or crossover.
I’d tend toward just using some silicone seal (becaus ei know where i have some). Today’s sealants are generally better than those from 40–45 yesrs ago.
dave
dave
Silicone is not your best choice. It’s expensive and is picky about surface prep. If you’re just going to squirt it in there, then I recommend a urethane based caulk. Long term solution and it doesn’t require the same prep as silicone.