Nice photos and good job so far.
Please allow a couple of comments, not meant as criticism;

The Beovox S120 woofers are pretty tolerant but I can think of
many others not so, the RL140's springs to mind as trouble candidates
with very tight tolerances.
Getting it right by simply "feeling your way" won't work - I've been there and RL140 woofers are 6 ohms and practically impossible to match to any available type.

Surely, the cone needs to be centered but also parallel to the magnet
by stabilizing ie locking the coil with respect to the magnet - align and shim.
To do this the dustcap needs to come off and you need to insert shims
of different size and thickness and these will stay in until the cement
has fully set.
A new dustcap will then have to be mounted, I normally use a
somewhat sturdier type, slightly larger than the original mainly
for aestetical reasons, namely to cover any visual remains of cement
from the old dustcap.
Shim'ing the coil/magnet is by far the most important step of all !

The perfectionist would inspect the spider for
warpage (from time, moisture, heat etc.), maybe even
dismount and realign the spider to be certain it's all
parallel and centered.
It would also be a good idea, in my opinion, to make sure
that the height of the cone matches with the new surround
so that the new surround doesn't offset
the cone axially ie. pulls it in- or outwards when mounted, making
it work un-symetrically (distortion).

If using the correct speaker cement, 1 hour is far from
enough for the cement to fully set.
24 hours minimum and even after that you can often still
feel a bit of squish if squeezing the outer lip of the surround.
With regards to the amount of cement to use, I'd rather see a little
squeeze out from the inner lip than have the extreme inner egde
rattling at certain frequencies because it hasn't been bonded to the cone.

One more note: Stay away from the cheapest surrounds, some of the ones
occasionally found on Ebay, they are completely worthless in my opinion.
Some have wrong heights (inner/outer lip etc.), I've seen 3-4mm off,
some loses their form within months, others are not even round.
I have removed and redone several woofers from
previous "DIY attempts", luckily most could be saved.
If you don't do it right it's a waste of time and money, let alone risking damage to the woofer so it could be worth practicing
a bit on some cheap drivers before attacking No-Longer-Available B&O woofers.

Martin

C'mon Andy, stop farting about. I'm waiting to know if they sound OK!!!

Martin.
Thank you so much for your input, it has been taken on board for future reference.
As I said in my second post, I am a non-technical person. This project is mainly an inexpensive experiment, to see if somebody as thick as myself can save these S120s from the skip.
I understand the importance of shimming between the coil and the magnet but where would I get the correct shims? And I wouldn't know a spider if it jumped up and bit me on the nose.
Taking off the dustcap would be another problem for me as I would have to source a replacement.
If I was doing this job to sell the speakers, it would be a different story. I would have to do things in a technically perfect way. As it is, I'm really just 'playing' at it.
Hell, at the end of the day I have spent less than £35. If, at the end of it, the speakers sound ok then that's a bonus!

Once again, I really appreciate everything that you, a Wise Old Sage, have imparted to me  and I hope other Beoworlders will take onboard your healthy critisism.

Graham, I have finished the speakers and re-assembled them but the job takes three times longer as I have to..
1) Do the job.
2) Photograph everything (I can assure you that's not easy)
3) Shrink all my photo's so they are postable.
4) Make this thread.
I could plug the speakers into my 7000 system tonight to try them but have decided to finish this thread first.
If I plug them in and they sound crap or blow up, then I would lose the impetus to complete the thread.

Andy T.

Andy, I am sure that this project has taken an enormous amount of time. I was merely trying to let you know, in my own way, that somebody was with you and reading your story with interest.

I would read you anyway but as it happens,I have a pair of S80's with slight foam rot which I need to tackle. I consigned a rough pair of S80-2's to the skip earlier this year but these S80's are particularly fine and should be saved. They are my passive test speakers and are usually wired to a MCL2P in my B&O workroom. If I have a powerlink system to test then I just connect with a fully wired P/L cable and if I'm testing a passive system like a BC9000 I just pull the plugs from the MCL2P and plug into the 9000.

The sound is actually more to my taste than most of the modern speakers like 6000's or 8000's because the woofer is actually big enough to move some air!!!!

Edit...... if you are reading this, you are wasting time.......get back to your thread writing

Andy, you are doing a great job and, knowing the S120 woofers and the way you tackle the things,
I'm sure you'll end up with a perfect result.
Thanks for the photos and for sharing this with us.

35 UK Pounds suggests you bought good quality surrounds.
For comparison, for fitting new surrounds to a pair of S120's (or similar) I "normally" charge
45-50 pounds (plus eventual shipping).
"Normally" because there can be situations, as stated earlier, where the drivers need more/other work.

Martin

I wasn't having a go at you Graham and thank you for reading this.
Thanks also to you, Martin. You have more faith in me than I have!.

After I had glued the bits of the surround that had been missed behind the clothes pegs, as before, I had to keep pressing them togethr every five minutes. Eventually they were finished and it was time to re-assemble every thing.
Like an idiot I put the rubber gaskets on the speaker frames and then the outer ring. Then I realised I would have to turn them over to put them in!

More sensibly, I laid the speaker enclosure fronts on the table, raising the lower portion up with two folded up dusters as the outer rings protrude  a little.

Looking round the rings, I found a little notch which corresponds with the seam on the aluminium bit of the ring.
This obviously goes to the bottom.

After putting the ring in, put the rubber gasket in, checking all round that it has seated properly.

Then introduce the driver to the gasket, ensuring the electrical connectors are nearest to the circuit board.

Replace the four metal clamps with their rubber blocks under them an tighten the screws tightly.
Unbelievably, I almost forgot to connect the wires to the driver!
I previously had marked one of the terminals 'red'.

Standing the speaker enclosure on the table, there is a foam rubber gasket on the top of the speaker, no foamrot here
But the damn thing keeps falling off!

So I put three teeny-weeny specks of blu-tack to hold it up whilst placing the speaker fronts on the cabinets

Then offer the front up to the enclosure and connect the two wires. I had previously marked 'grey' near the relevant connector (sensible)

The piece of white wadding that I am pointing at was originally stuffed into the back of the woofer so I did the same.
As I mated the two items together I was also gently rocking the whole unit back until it was lying on it's back.
Just a case of replacing the six screws and tightening up.

They look pretty damned good

Dying to plug them in but the jobs not finnished yet.
I've to sort out the frets now.

Spoilsport!!!!    Plug them in.......what do they sound like????

I find the level of self-control that means you can deal  with the frets before plugging them in to see  how they sound kind of unsettling.......

 

Simon

Go on - get them running - i'm dying to hear what they sound like too !!!

Lee

I think he's just stringing us along! He must have plugged them in.

The woofers will sound a bit "dead" and "stiff" at first. They will have to be "worked in" before losening up, just like when they were new. Don't judge anything within the first 20 hours of playing or so.

Martin

Now come on lads, if a job's worth doing, it's worth doing well.
Hi there Mr 9Lee, your BMW 5 series is here but we don't have the doors or the boot yet. Would you like to take it for a quick spin?
I think not.

Well the frets are a bit of a mess.
Very dirty

Three of the sixteen locating pins have been snapped off