Pickups and magnets

[Rayman]

Can anyone assist? I have an active bass, that I was doing some work on…. I needed to put it face down on a raised surface, and that raised surface was an upturned speaker, with a giant magnet on the back… so, after resting the bass on the speaker, on its pickups….. 🤦🏻‍♂️, it now doesn’t work. I assume that the magnet has affected the polarity of the magnets in the pickups? Anything I can do to reverse the damage?

[Hellzero]

To reverse the demagnetisation, you'll need a lot of specially designed apparatuses, so it will be cheaper to change the pickup...

 

 

[Rayman]

🙁

[itu]

If the magnets can be taken away, they can be replaced or magnetized. If the pickups are packed into resin, then it is easier to use a specific magnetizer or change the pickups. 

[Joe Nation]

Could the magnet have affected the active circuitry?

[Hellzero]

4 minutes ago, Joe Nation said:

Could the magnet have affected the active circuitry?

Yep, the opamp could have been affected.

[Hellzero]

It all depends on the power of the magnet.

[itu]

3 minutes ago, Joe Nation said:

Could the magnet have affected the active circuitry?

Most likely not. To kill an opamp you would need a very big electromagnetic unit used in hospitals (MRI scanner) and the IC could still survive.