From what I've heard, it can make a big difference in the clarity of the treble!

My S45-2 was upgraded before I bought them recently with Jensen caps (if I remember correctly) so I cannot really claim to have first hand experience of this. But I do know that they sound exquisitely detailed and balanced now! :-)

Best value for money:

Your capacitors are now some 40 years old, dried out or at least out of specs. I have done some 10 speaker pairs, from Beovox 1600 to M70s, few caps, maybe 2 out of 10 were inside specs (20 %), I even tried on my Beovox 3702, expensive caps in one speaker, and normal of the shelf in the other, and no audible difference. If you use Martins (Dillen) caps you will get caps as near as originals as possible, tested and new, no old stock, and normally he provides instructions for the change.

By "Martins" caps, you mean the ones from described here: https://www.martin.com/en/site_elements/cpfc-capacitor-replacement-recommendation

I think he means the ones I link to in my reply above.

Martin

Kent Reuber wrote:

By "Martins" caps, you mean the ones from described here: https://www.martin.com/en/site_elements/cpfc-capacitor-replacement-recommendation

These

Søren Mexico wrote:

I even tried on my Beovox 3702, expensive caps in one speaker, and normal of the shelf in the other, and no audible difference.

 Good afternoon Søren,

Just to be sure I've understood well: are you saying there is no advantage using high-end capacitors in a speaker? That any correct but average component will do?

And a side question for everybody: when electronically restoring a speaker what component should be replaced? Capacitors, ok but also those red coils also? Or anything else?

Thank you.

Hi Kent

I have just bought and fitted the kit from Beoparts for the M100-2 and it completely restored their performance, it did make a huge difference for those. I had previously had the filler drivers restored but as far as I know there is nothing else that can make such a huge difference with these beovoxes. 

I have a pair of S45-2s also that I am going to recap in due course.

I cant recommend enough recapping them as, for me it has made a huge difference.

Luckily the damping material in both the M100s and S45s doesn't look like it deteriorates and drivers don't seem to deteriorate either. The coils and magnets also seem ok and I'm not sure if there is anything to be gained by changing the internal wiring - so you are left with the crossover and the capacitors as being the item that deteriorates over time.

Other factors would of course be the signal that is being fed to them, but at least if you recap the speakers then you know they are performing as they should.

Hi Kent

I have just bought and fitted the kit from Beoparts for the M100-2 and it completely restored their performance, it did make a huge difference for those. I had previously had the filler drivers restored but as far as I know there is nothing else that can make such a huge difference with these beovoxes. 

I have a pair of S45-2s also that I am going to recap in due course.

I cant recommend enough recapping them as, for me it has made a huge difference.

Luckily the damping material in both the M100s and S45s doesn't look like it deteriorates and drivers don't seem to deteriorate either. The coils and magnets also seem ok and I'm not sure if there is anything to be gained by changing the internal wiring - so you are left with the crossover and the capacitors as being the item that deteriorates over time.

Other factors would of course be the signal that is being fed to them, but at least if you recap the speakers then you know they are performing as they should.