hello i found this page:
https://audioxpress.com/article/patent-review-double-coil-speaker
as far as you know, has this patent been followed up with a concrete project?
https://audioxpress.com/article/patent-review-double-coil-speaker
as far as you know, has this patent been followed up with a concrete project?
The Manger Sound Transducer uses an arrangement of two voice coils that are mechanically in series and electrically parallel. The advantage is gratly reduced Lvc.
IIRC this was patented decades ago,
Regards
Charles
IIRC this was patented decades ago,
Regards
Charles
I skimmed this, expecting it to be another useless re-invention, but it actually contains an idea I haven't seen before: When a speaker is driven hard enough that part of the voice coil leaves the magnetic gap, that part of the coil ceases to contribute force, so it doesn't need to be energized. This means you can get away with a smaller magnet for a given amount of linear excursion. I don't think this would be practical in reality though, since surely the extra expense of a second amplifier will outweight the saving of a smaller magnet.