Subwoofer broken?

[shankly1985]

Hello sorry if this the wrong section I did look for support.
My Sub from Tannoy SFX has started making a strange sound, even when only the Powercable is connected
Here is a recording - Heads up might be best lowering your volume before playback

OneDrive

https://1drv.ms/u/s!Ak7DCi1mPambnSp1EVvGlYiu1Qx5

 

[AtaRo]

Scratchy sound mostly caused by dirty/worn put potentiometer.

Clean it with IPA 170 Isopropyl Alcohol spray or replaced the faulty pot.