It is made by Peerless - it is the phase link unit. Mine was refoamed and works fine.

Try a vacuum cleaner on the dent! The supertweeter adds nothing for me as I cannot hear the frequencies it produces!!

Hi, I have a set of Beovox M100-2 speakers close to condition that you have. Here are the identifiers of the speakers from the service manual. The specific part numbers for the speakers are not provided (at least not in my copy).

The speaker you are asking about is the 4 1/2 inch phase-link unit. It has a foam surround for the attachment of the speaker voice coil to the speaker frame. Many speakers from that era used foam surrounds and they eventually wear out. If the speaker isn't damaged then you should be able to have new surrounds attached and the speaker will be good as new.

I haven't replaced my surrounds on the 4 1/2 inch phase-link yet but will be needing to soon.

My 12 inch woofer surround is rubber and is in good shape. Is your woofer surround also rubber?

Here is my 4 1/2 Inch Phase-Link from one of my M100-2 speakers. The speaker is still functioning well but deterioration is beginning to show on the Phase-Link unit. I will need to stop using this M100-2 pair until I refoam the Phase-Link units in both speakers.

Here are my M100-2 tweeter units. That is the way I received them so I don't know if the top tweeter (3/4 Inch) is supposed to have any additional cover or not.

Here is a full view of one of my M100-2 speakers. Overall it is in excellent condition. When I refoam the 4 1/2 Inch Phase-Link unit I will also look at replacing the cross-over capacitors with a new set. If I don't already have the capacitors in my stock I typically check with Martin to see if he has a kit. I have used his kits on Beovox MC120.2, Beovox MS150 and Beovox S55 speakers.

I measured the diameter of my M100-2, 4 1/2 Inch Phase-Link Unit and it measures 4 Inches. I checked the Beoworld product information page and it lists these measurements for the speakers -

Woofer: 33cm (12.99 inch)
Filler driver: 11.5cm (4.5 inch)
Mid-range unit: 5.5cm (2.16 inch)
Tweeter 1: 4cm (1.57 inch)
Tweeter 2: 1.9cm  (0.75 inch)

Beocentral provides this information -

12” woofer made by SEAS,
a 3” cone midrange (mounted in a sealed and reflex ported section of the cabinet) made by Peerless,
a 2” dome upper-midrange made by ITT in Germany,
a 1½" dome tweeter made by SEAS
and a miniature dome upper-tweeter made by Philips.

My actual measurements are these -

12" woofer
4" Phase-Link
2 1/2" Midrange
1 1/2" dome tweeter
3/4" upper-tweeter

The only one I am concerned with is the 4 Inch Phase-Link to order a correct foam surround replacement.

-sonavor

This archived Beoworld thread is about refoaming the similar (if not the same) Phase-Link on a Beovox M75. Since that thread has anyone found a source for an exact match replacement surround for the Phase-Link? The archived thread states that oversized foam surrounds were modified to fit.

-sonavor

I found thislink. I also found