Hi guys!
How to fix this?
(view attached file)

 

Try carefully with a hoover.

 

small piece of duct tape.... carefully

 

the dustcap has no other function than closing the voicecoil and airgap from polepiece space underneath it. The vacuum clener works, use with caution. Maybe use a hairdryer to warm up the plastic a bit. NOT HOT AIR! Just abt 40°C like a hot bathtub.
I know what i talk abt. I designed driveunits. So dont worry.
The dustcap on a smaller midrange drive units is another story,
or a aluminium one for Guitarspeakers (they make the screaming resonance)

 

Last edited: Oct 22, 2017

So... this is only a cosmetic fix, right? AFAIK there is no audible harm done?

 

Yeah it doesn't change the sound

 

its a Subwoofer, the dustcap would be signifikant in frequencies over 500 Hz.
The integrated crossover should limit with a lowpass at abt max 80 Hz.

 

Doesn't look like a sub with that tweeter. Crossover point is at least 1k?

 

oh sorry, i only saw a " woofer". And i know KRK has similar looking subwoofers.
The Dustcap is a typical "Design" dustcap, way too big. Usually u use such a Dustcap only on big Woofers like 2"-4" voice coils .
Again the only way to get it out is warm it up a bit, use a vacuumj cleaner with airregulation and plop it outwards.
Afterwards put the speakers side by side on a stand with no surfaces surrounding them and make an A/B Comparison with "pink noise" as a source. The speakers should sound the same (with a very small difference in upper frequencies).
Sorry again what i said was only for real woofers. In this 2way speaker it would be called a Bass Midrange Speaker and it usually cuts at 2-3 Khz. I hope all my advice can help in other cases.