SBLs

Silklee,

had the same thoughts this year as my SBLs are nearly 30 years old (but still sounding great). My solution was to buy some really late mk2 at a good price and treat them to a new paxo from Naim and new grills from Tomtom. Under 600 all in for a true classic. Naim still supply tweeters too should I need them.

There is nothing out there new that delivers in quite the same way. I was cutting edge back in the day, happy to now be anachronistic...

Stu

I have the same dilemma, having most of the system serviced and DR'd. My SL2's are 2007 vintage, they have had a new set of tweeters (matched from Naim). But I'm wondering about the cross overs. Manu at Plurison says they should be OK for a while yet and can be serviced. However I am reliably informed that Naim cannot supply any new cross overs.

Tim

Hi Timbo,

I emailed Naim re parts for SBLs and got a very speedy and positive response. SL2 paxos are electrically identical to SBLs but in a different case. Mine are brand new so I would be surprised if they were not available for your 'speakers. However, 2007 makes them babies! Loads of life in them yet, and I mean decades!

Stu

silklee posted:

Can the SBL paxo be recapped/serviced?

Technically, yes. Though when I asked, Naim didn't offer it because the cost would be about the same as having a new set made. Witch Hat said they'd service them, and quoted a similar price. So not much use for SBL owners, but could be useful for SL2s.

If you subscribe to the let them hang free school as regards the Xovers the SL2 ones fit in between the frame of the SBLs  quite nicely.

A little bend is required on the treble cable to align properly with the SBL sockets.

A search might find you a post I made about fitting Sl2 Xovers to it's older brother.

Hi, I am trying to find pictures of the SBL mk1 vs mk2 drivers but to no avail. I have done a search and the closest I could find is this...

https://forums.naimaudio.com/topic/sbl-mk1-or-mk2

Richard Dane seems to have posted a photo of them in one of the post but I can only see a 'x' in it now.

Can someone point me to some photos showing the differences?

Seems like this site

http://www.sbls.co.uk/

which used to have a lot of information on SBL is also no longer available.

silklee posted:

Seems like this site

http://www.sbls.co.uk/

which used to have a lot of information on SBL is also no longer available.

That's a shame, it was a good resource.  Naim themselves used to direct people to it.

Here's a photo of the mk2 drivers - note that the sides of the driver are parallel to the sides of the cabinet, unlike the picture Richard posted.

Caption

 

Hungryhalibut posted:

Look at the picture in the first thread you linked to. Richard posted a picture of the original version. 

Hi. Hungryhalibut, can I have your email contact. Want to ask you something in private.

I remember the forum used to allow us to write on someone's wall but now I can't seem to find the feature now.

 

silklee posted:

Can the SBL paxo be recapped/serviced?

To answer my own question, I emailed Naim and was told...

1. The SL2 "crossovers are no longer available new from us'.

2. Naim "can no longer service SBL crossovers - some of the components are no longer available"

What the general consensus? How long can a SBL crossover last till  it deteriorates to a point where it affects the performance of the SBL. 

silklee posted:
silklee posted:

Can the SBL paxo be recapped/serviced?

To answer my own question, I emailed Naim and was told...

1. The SL2 "crossovers are no longer available new from us'.

2. Naim "can no longer service SBL crossovers - some of the components are no longer available"

What the general consensus? How long can a SBL crossover last till  it deteriorates to a point where it affects the performance of the SBL. 

The capacitors are the main components that may deteriorate over time (though not all do). Whilst the original ones might not be available, there are plenty of good audio capacitors around (at a vast range of prices), and it is possible to buy matched pairs to ensure both channels are identical. So, if the crossovers get to a point where they don't sound right it would still be possible for someone competent with a soldering iron to re-cap. There could be subtle differences in the resultant sound compared to the original - marginally worse, or better, depending on the precise original and replacement cap values (e.g. A cap value of 15.3μF may have been specified and one of nominal value 16 used but testing and selecting one with an actual value of 16, and unless that info is known the replacement may have a slightly different capacitance, also there might be tiny differences from other qualities of a different brand of cap) but undoubtedly better than with caps that have changed significantly in value or failed completely.

Resistors should be OK unless they've been driven heavily enough for overheating (which may visibly show) - they will be easy to source replacements. The inductors are more difficult, however unless there has been catastrophic overload (e.g. a failed power amp) then they should last forever.

As for how long they last, when I recapped my 40 year old IMF monitors a few years ago on the assumption that they would have degraded but gradually so un-noticed by me, there was a marginal change but by no means radical and I can't say whether it was an improvement. BUt it will very much depend on the original caps.

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