So i bought a used Z625, at first it feel coarse, then i turn it, it would produce cracky sound .

After that, i followed the ' turn off, turn left/right for 30sec ' and that kinda fixed it....

but then, occasionally, there will be a little cracky sound when i adjust volume... then I opened it up and used Contact Cleaner on it... now it will really smooth and clean..



Do Potentiometer need lubricants?

Not sure how to lubricate it since it's sealed up.

Desoldering and buy replacement is out of league for me....


I need help


Attached thumbnail(s)

mine also same problem. Have cracking sound When pressing power button or adjust the volume... Alot logitech speaker have this problem.

Yours Logitech also, Z625 too?

yes Z625 also but very very old. I have tested new z625 demo unit at some computer store, have same issue too.

what ?? even demo unit? How old is your Z625? not to confuse with z623?

1. bettter replace new potentiometer. the brush inside have worn out.
2. set a loudness and dont adjust anymore. use window volume

This post has been edited by ktek: Nov 5 2019, 08:31 PM

Replaced the potentiometer...

good job. it will run well for many years

But i wasn't able to find a potentiometer of the save value, only in design to match the original one.

the new one is https://my.rs-online.com/web/p/products/7293454/ , a 10 kΩ, a Japanese made, APLS is the company.

the original one is same look , dimensions, and desgin. only in different value , a 100 kΩ. a taiwanese made, ALPHA is the company, cannot find online...

Replaced them anyway... not sure it would affect anything, but the sound looks okay.

Opss.. mine one is Z623 XD, even my freind z906 also same.

I'm mostly control volume from PC now....

haiz... my altec Lansing VS4621 even though 3 years already also better than Logitech... the volume's potentiometer all good... even my way older VS2521.... also no such problem.... Logitech not so good i think.... Youtube all also show Logitech problems, like volume's potentiometer, subwoofer burn, no power, power switch problem... etc etc...

Any encounter with Edifier? Are they Good?

Tested some Edifier speakers at computer shop around my house area, sound quality not bad.