no idea - they are in the cartons at the moment! rebuilding the speakers tonight
And are sounding fabulous already -- maybe a little leaner at the extreme LF, but the timing is still rocking.
Oh and note to naim service (and other dibble customers). The foam seals in the kit are getting to be *very* old. Getting the white backing off without it pulling off the glue layer too is nigh on impossible.
Odd as I believe we had some new stocks cut not long ago so they shouldn't be old - I can have replacements sent out to you. Drop me a message privately...
its ok phil, we sorted it -- but you might want to check one in stores to see what you think?
here is a LF cabinet after applying the new acoustic foam; looks really neat and cool
Wow looks good, who supplied the acoustic foam? naim?
Hi Mario, that was quite a struggle !
Naim didn't have it. I tried many UK and non websites, some of which Naim advised, but they either didn't have it or would sell only to trade customers... at the end I found a shop in Rome who would order for me a minimum amount at nearly the exact spec Naim gave me (in terms of PPI and height), and even using a bit more than what was strictly necessary I had four times the amount that I needed... but the old foam really did need replacement to keep its acoustic characteristics; after more than 10-15 years it just starts to crumble, like the foam grilles, and starts to loose its acoustic absorption characteristics.
This is what remains of the foam sheet.
Thanks Sbilotta, I have sent you an email.
Great news, have heard Jon's Dibbles sound wonderful on a couple of occasions, so hope to hear them again now they and the BTW have had some TLC lavished on them.
FYI - Naim no longer have plates for DBL tweeters, the tweeters themselves cost £230.00 each.
oh, forgot to add that when I opened the LF cabinet, the acoustic foam within would crumble with the slightest touch so I'm changing that too; if you need the exact specs just send me an email (in my profile page).
The HF Cabinet foam on the other hand is different and is still in good condition; the foam is around the mid driver zone whilst in the top tweeter zone of the cabinet you have a wool mesh kind of padding.
All the best.
I need to repair my 1998 DBLs.
Can you please tell me the specs of the foam inside the box?
replied via email.
All the best.
Hmm... reading this thread has led me to wonder about my NBLs now. And those bass drivers show no easy access at all. :-(
I need some adhesive velcro too.
Please, where to buy?
sbilotta posted:Ron Toolsie posted:
Try gasket tape...you can buy it from DIY stores by the roll for the price of a pint. I used it with one of the DBLs, and it passed the 'driver compression test' and was indistinguishable from the genuine gasket in that regard. Why spend near 200 quid for tar that can be gotten for a ha'penny ;-)
Out if interest I tried the gasket tape initially without the silicone sealant....it failed the compression test. After the required sealant bead was applied it was as good as new.
What kind of gasket tape would that be Ron ? (Neoprene Sponge, PVC foam, ...)
Mine are fine but good to know.
"Italic" gasket: "Il Guarnitutto Mousse-Tak autoadesivo" produced by CASAPROTETTA mm.10x5 - m.15