Hi Willy, just read that your renovating a pair of DBL's would love to know more about this.
Mine are in pretty good shape but any knowledge for any future repairs would be great!!
Do you have any thoughts on Evars NBL midrange cut outs, no body else responded.
I have DBL's SL2's NBL's and Nsats, I obviously love naim speakers to bits but am saddened that they no longer service or supply many parts for them. My SL2s I purchased new and are pretty much perfect. The only issue with them is the foam inside the top box which is disintegrating. I got a pair of grills on naims last run but remember someone else saying that an American manufacturer who also does DBL grills is working on being able to supply SL2 grills also.
I picked up a pair of 1993 vintage DBLs in black. Several issues:
1) Cosmetically I'd rate them 7-8 out of 10. Not really an issue as they're in my home office and years ago I had black brics so I'm a dab hand at touching up the edges. Know a friend of a friend who does woodwork restoration so may pick his brains on best practice for "tarting" them up.
2) Bass driver surrounds are perished. One had a 3" section of the surround missing. At this precise moment in time they're in a van to be delivered to ATC for a recone. Had it not been for Jon Honeyball's recent thread on this I would have probably run a mile at seeing that.
3) Gaskets were in reasonable shape apart from where a crossover had been leaning on one due to poor packing. Thought I'd need replacements but after a few weeks the "notch" has bounced out again.
4) Aluminium pads on the bass box well used but not perforated. I've ordered replacements anyway.
5) The bottom of the HF/MF boxes are quite worn, grooves of 3+mm deep. Have procured Ronseal High Performance filler and i'll patch them.
6) Mid units were replace 3-4 years ago. This is good as they're no longer available.
7) HF units may have been replaced 5 years ago. Front faces are a bit gouged but they seemed to sound OK. Still available so unconcerned if I need to replace them.
8) HF mounting plates are different. One is gloss and one is a satin finish. Also they bulge a bit at the bottom. Will explore flattening, stripping and refinishing them or having new ones manufactured as they're apparently no longer available.
9) And now for the weird bit. A section has been cut out of the lower cross member of the upper box support bracket. No one seems to know why though I note that it makes it a lot easier to disconnect the cable from the back of the bass box whilst it's in situ. Maybe they were being moved a lot at some point and this would make it easier to remove the bass box without damaging the gasket/silicon seal? I don't believe it affects the structural integrity of the support (held to the L shaped cabinet by screws outboard the cuts). It can be repaired.
Needless to say item 9 allowed me to negotiate a favourable price.
I'll do some more posts with photos as I work through the repairs.