I have a pair of 25 year old CDM 1 SE’s driven by a Bryston B60 amp. To my ears (admittedly aging) they sound flat with little base and muted highs. I have read that the ferrofluid in the tweeters is known to dry out and requires changing every decade or so. Would doing this make a significant difference, or just a subtle one?
I’ve also seen several entities which advertise upgrades for the speakers at a cost of $300-$400 dollars. If anyone knows what parts would be required, and whether it would be a worthwhile thing to do an upgrade of the crossover, I’d love to hear ideas and feedback.
I’ve also seen several entities which advertise upgrades for the speakers at a cost of $300-$400 dollars. If anyone knows what parts would be required, and whether it would be a worthwhile thing to do an upgrade of the crossover, I’d love to hear ideas and feedback.
The tweeter crossover has two film capacitors and an air core inductor, so expensive parts upgrades
probably aren't worth it. The woofer crossover has a small bipolar electrolytic, so that could reasonably
be replaced with a fresh one. Check all the power resistors for damage and values.
https://speakerrepairshop.nl/en/ins...dm-1-tweeter-zz09989-zz9989/c-42#.WyeuKfZFzIU
probably aren't worth it. The woofer crossover has a small bipolar electrolytic, so that could reasonably
be replaced with a fresh one. Check all the power resistors for damage and values.
https://speakerrepairshop.nl/en/ins...dm-1-tweeter-zz09989-zz9989/c-42#.WyeuKfZFzIU
If the ferrofluid has indeed dried out, then changing it will restore the treble 'sparkle'.
https://speakerrepairshop.nl/en/instructions/replace-ferrofluid-in-tweeter/c-36
https://speakerrepairshop.nl/en/instructions/replace-ferrofluid-in-tweeter/c-36