Proline 3000 Speaker Membrane Slow Return Issue (First Repair Attempt)

[Damnati]

Hi everyone,

I have a T.Amo Proline 3000 amplifier, and I’ve noticed something strange when playing music. After every bass kick, the speaker membrane doesn’t return to the neutral position immediately—instead, it slowly moves back as if there’s some kind of delay. It’s not exactly a DC offset (at least I’m not sure), but the speaker doesn’t behave normally and seems sluggish in response.

I tested the same speaker with a different amplifier, and the issue does not occur, so I’m sure the problem is within the Proline 3000.

This is my first time attempting a repair, so I would really appreciate some detailed guidance on where to start troubleshooting. If possible, please explain things in as much detail as you can so I don’t miss anything important.

What could be causing this issue? Could it be DC offset, bad capacitors, or something in the power supply? How can I test for these things? Any help would be greatly appreciated!

I only have a Multimeter to work with.

Thanks in advance! 😊

 

[JonSnell Electronic]

That sounds like, from your description, instability.
You casnnot fault find with just a multimeter.
Send it for repair to an authorised repair shop.

 

[Damnati]

Why does it sound like instability? What kind of instability? What do you have in mind? I can check almost every part with a multimeter.
Repairing it is more expensive than buying a new amp.

 

[BSST]

I'm not optimistic about fixing this issue with only a meter, but finding and posting a schematic would be first order of the effort.

Good luck!