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Beovox CX100 crossover or elements issue?

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kimhav
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kimhav posted on Sat, Apr 3 2021 12:20 PM

Looking at adding a pair of Beovox CX100 to my BS6500 system and got hold of a pair with replaced bas elements but when trying them out I directly noticed that one of the speakers sounds bad (audio sounds distorted) with regard when playing at higher volume (30+) but while playing lower than 30 then there isn't any issue on low/mid range. What is a good guess here; would it be the tweeter- or bas element that is either bad or bad crossover filter which needs to be looked into? Or simply speaker rattle? Added two audio clips (had to zip them else upload wasn't possible) recorded using the phone were you clearly can hear the difference. Did also swap around the speakers to verify that there isn't issue with the output from the BM - which there isn't.

Beovox CX100

Dali Menuet

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Dillen
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Verified by kimhav

Any lose foam edges?
Any rubbing when you (carefully) move the cone by hand?

Martin 

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Dillen
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Was both woofers and both midranges replaced?
And with what?

Martin

kimhav
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Yes, both woofers was replaced with similar woofers (don't know with what or brand and but can check) in both speakers but the midrange wasn't replaced and the nothing was done with the filters, so untouched and as mentioned it's only one of the speakers that sounds 'rusty' when hitting certain frequencies on +30 volume (BM6500). Guess that you recognise the track intro, which is Alphaville's 'Forever Young'.

[EDIT] Checking the elements I see they've been refoamed and not fully replaced.

Dillen
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Verified by kimhav

Any lose foam edges?
Any rubbing when you (carefully) move the cone by hand?

Martin 

kimhav
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Martin, I'm starting to suspect that their might be one part of the edge which might not be 100% glued. Pressing gentle on the surrounding ring I notice tiny movement which might not be fully loose edge, but should be fixed:

But, inspecting the full ring I found this section which clearly needs to be fixed:

Dillen
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Exactly what I had in mind.

Martin

kimhav
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What kind go glue would be recommended to fix this?

Dillen
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Ideally you should use the right stuff, called Speaker Cement - but if you don't have that at hand, any good contact glue will be fine for this little repair.
The aim is merely to keep the lose edge from vibrating.

Martin

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