If neodymium is all that great . . .

[mige0]

Hi

just to do some experiments I would like to try to replace the permanent magnet of a mid or bass unit with a field coil.

Any idea how to loosen the glue without damaging top plate, bottom plate and voice coil etc.?

Greetings
Michael

[thoriated]

This isn't directly apropos of recent comments, but I wanted to mention that I just replaced the 2220J's in my Iron Lawbreakers with freshly reconed and remagnetized 2220B's (courtesy of GPA) and am noticing a very significant improvement in inner detail through the lows and lower mids, also matching these characteristics of the HF 288G's quite a bit better. As a result, the sound stage has also become deeper and more coherent throughout the speakers' bandpass with better articulation of small musical details.

Compared to the 2220Bs, the 2220Js sounded a tad hashier, masking subtle inner detail. Since I'm not going to push the 2220B's with more than a few watts average or dropkick the speakers around town in this application, I have no concerns regarding alnico 'demagnetization'.

[tomtt]

Originally posted by mige0


Any idea how to loosen the glue without damaging top plate, bottom plate and voice coil etc?

'lacquer thinner'

sometimes works -

apply sparingly ...

[mige0]

Originally posted by tomtt



'lacquer thinner'

sometimes works -

apply sparingly ...

Thanks TomT - wouldn't have thought that this is an option as my guess was that its acrylic glue (superbond)
used for loudspeaker motors

Greetings
Michael