Technical help with RL speakers (North East UK)

25 replies

I have 2x RL60s and 2x RL140 speakers, all bought from Ebay within the last 3 months. Based on what I have read on previous threads and been advised by users of this forum, these are quite likely to be suffering from foam rot by now. I can't really tell from listening to them whether there's any damage or not as I have no other good quality speakers to compare them with.

Anyway, at midnight tonight armed with a copy of the service manual kindly provided to me by Steve at Sounds Heavenly I decided against my better judgement (me and electrical quipment don't mix!) to open one of the RL60s up and see what I could see for myself. I did manage to get the back cover off and removed the screws that seemed to be holding one of the bass drivers in place so I could look at it from the front, but it still wouldn't budge. At this point I decided that the job was definitely beyond me and put everything back together (hopefully the way it was before!).

So the point of this thread is to ask if there's any beoworld member, preferably in the Durham area (but let me know even if you're somewhere else in the UK and I will consider), who is familiar with these speakers who would be able to have a proper look at them and if necessary refoam them for me. I would of course pay you for your time and expertise 🙂. Alternatively if anyone can recommend somebody who could look at them for a reasonable rate that would be good. I have been told the job isn't too complicated but as I've said I just don't trust my abilities!  

Thanks, Rob.

Hi Rob

I know that the RL140's do definitely suffer from foam rot as I own a pair, the other RL's I'm not sure.

Good Luck

Ben

For the RL60's it's not the actual drivers you need to look at but the ABR (the big rectangular thing at the bottom). If the foam surround has rotted it will likely be quite visible. For pictures see the recent RL45 thread in the "workshop" forum. (It is the drivers in the RL140's, they don't have an ABR).

Although I live nearby I can't help with the re-foaming as I've never tried it myself either. The RL140's are reputed to be very difficult to refoam properly and aren't really a "starter" project. Member Dillen has, I believe done many of these. If they do in fact need doing he may be the man (although you'd have to ship the drivers to Denmark). Alternatively there is

Hello Rob, i have put a new post up on the workbench area about refoaming ABR's & if you want to take a leap of faith I am quite welcome to refoam them for you. The cost of postage & foam would be only a few quid plus a small donation to my refoaming fund. Here is my new thread, /forum/the-workbench/bang-amp-olufsen-red-line-authentic-diy-abr-auxiliary-bass-radiators-successful-repair, Beomatt

Rob,

As Puncher suggests, your RL140 woofers are most welcome here.
The tolerances in these drivers are pretty tight so, with all due respect,
I wouldn't recommend this refoam job to a beginner.
Alternatively, I have a set of 4 already refoam'ed woofers for sale.
The way I fix the RL60 ABR plates is quite similar to what's shown in the
thread, apart from the thick material used. Your ABR plates are also welcome
here if need be.
You wouldn't have to send the whole speakers in the given case, just the
drivers and ABR's.

Martin

OK I have opened up both RL60s and here are some photos of them inside.

RL60 #1, close-up of the ABR

 

RL60 #2 ABR

 

Clearly the foam has deteriorated around the frame - hopefully someone can tell me how badly, i.e. are they in a such a bad state that the foams should really be replaced, or will the speakers still be functioning OK?

Also, isn't there supposed to be some kind of plate in there, rather than just a big hole!? Looking at Beomatt's thread there should be, or is that just on the RL45s? If there is supposed to be a plate, neither of mine have one!

Photos of RL140s to follow shortly once I've got them open...

Yup - they've removed the plates to stop them thudding about, they should be exactly like the RL45's (it's the same part in both speakers).

The drivers themselves (in the RL60's) aren't susceptible to rot and so will be fine - the ABR definitely needs attention!

Well, looks like I need 2 replacement plates as well as refoaming doing. Martin, is that something you can help with too?

Here are the photos of the RL140 woofers.

RL140 #1 top woofer. This one is relatively in tact, although there are signs that the foam is starting to go.

 

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