View Full Version : Amp repair question

12-13-2011, 05:02 AM
Not specifically about ukes, but from this board I learned about the Mobile Cube, which I do not at all regret having bought for a practice amp.

As I owned it since almost 30 years anyway, I also used my old Cube Keyboard 40, when I wanted some more depth to the sound. Unlike the guitar Cubes the keyboard Cube has a very clear sound revealing sloppy left hand work. Which is what I need in my strive to improve as a player.

The other day the Cube Keyboard suddenly went dull loosing all of its presence. I have done some troubleshooting by means of comparing to the Mobile Cube and by means of the earphone-out plug. As I get it, it is the piezo descant horn that has died and not the amplification behind it.

Is it worthwhile replacing that treble speaker? Is that part at all available?


12-13-2011, 06:23 PM
Klaus, it should not be too hard to replace the horn in your amp. They are readily available. You just need to find the right size. Here is one I found on Ebay. They have other shapes if this is not the one you have.


12-13-2011, 08:46 PM
Thank you very much for the link!

Your reply has moved my thinking and my memory up a few levels. So now I know some parameters more to look for before I start searching the web for a replacement. I may have to come back with more questions later, but already now asking was worthwhile.


12-14-2011, 06:16 PM
Piezoelectric tweeters are relatively inexpensive and it should be easy to replace, Klaus. I do a lot of business with MCM: