I am stunned by the sheer design and construction. The lower unit has a damping weight attached to each side, probably not all at the same height - could not see without removing the wool.
The metal work is also a costly design and any other manufacturer would have undoubtedly used a simpler design.
Such attention to detail ought to give a superb result (otherwise it would be a waste of time).
Now I am just waiting for the silicon to cure. It was obvious that the speakers have been reassembled a few times judging by the number of dimples in the aluminium pads. I was going to replace these but couldn’t find any sheet thin enough lying about.
I cleaned all the electrical contacts with switch cleaner and gave the boxes and metal work a light waxing.
Replacement grill foams are on order.
I’d like to have replaced the woofers but used ones are unlikely to be in a better condition.
Well I am so far quite impressed with the SBLs but they do sound a little bass light in comparison to my drastically altered ML Aeons*. I have them about 5cm from a stone wall. The woofer to lower unit seal seems good
However one tweeter needs to be removed to fix a loose connection at the sockets but I can’t budge it. Are they glued in with sealant?
*Sorry ML, the electrostatic panels had deteriorated and were removed and replaced with a solid baffle and a GSR dipole mid-tweeter with a 12db HP 500Hz filter. To be honest the results were better than I expected at least at low-medium volume.
You might trigger an avalanche of comments on that bass point. I think it is fair to say they can sound bass light and do perform better on a solid floor/solid wall boundary, but they don’t always sound bass light. The response I get seems dependent on source and on recording. The most bass I’ve ever heard from them was from an FM live broadcast, which took me by surprise for a speaker I thought I knew, but I find MM phono is bassier than some CDs, and streaming can be pretty bassy too. Sometimes I think I need a subwoofer to support that bottom octave and sometimes I think it’s the last thing I need.
Evertime I am reading about rebuilding SBL, I am so tempted - but I do not know people who can help. I don’t want to try it myself - even with the great tutorials. Maybe sometime I will do.
Mine are from 88 or 89 too and I have owned them from the beginning (except that I bought them as demo pair).
And they sound sooo GOOD. But I do know, that MK2, new sealing and new tweeters (have a pair) might bring some real steps forward. If someone from northern Germany is a SBL specialist
I’m sure that you will be able to find a dealer to help with any rebuild/upgrade of the SBLs. The problem, as ever, will be paying for the time of getting someone suitably qualified to help you. But they were lovely speakers, and they deserve a little TLC now to get them up and running again.
My newly acquired 1988 model are certainly a bargain at £350 + £140 for a pair of new tweeters.
Just have to find out what is causing the intermittent connection on one tweeter - sockets, plug or cable.
When the tweeters are replaced, is there a chance of „mismatch“ - even when both are replaced, as the original ones are matched by naim.
Think replacement is more improvement because of aging old ones and replacement with new ones, than loss because no matched pairs of new ones.