audio-talk

Paul Barker wrote: ↑Fri Apr 29, 2022 11:31 am

Nick wrote: ↑Fri Apr 29, 2022 10:33 am Well, I was in Peterborough in the 1970's, but I don't think there were NXT speakers then.

They never made it into the Laskies catalogue. I think they were either in melody maker or exchange and mart. The only two comics I read at the time. But my science teacher had them, however Im pretty sure they were readily available from one or other of above comics. on same page youd have found Eagle oval drivers with two tweeters on a metal flat bar centrally in front of the woofer centre. Thata and military surplus flying jackets! Makes you think of carpet baggers the film!

Nick wrote: ↑Fri Apr 29, 2022 12:04 pm My point was meant to relate to NXT not existing them, but I realized after posting that I had committed to saying that flat panel exciters didn't exist in the 1970's

No harm done.

shane wrote: ↑Fri Apr 29, 2022 12:27 pm Flat panel speakers and NXT speakers are not the same thing. The flat panel speakers around in the 70’s had a conventional voice coil and magnet assembly attached to the middle of a flat diaphragm, whilst NXT uses a number of motor assemblies to excite resonances in a panel to produce sound. This was developed in the late 90’s by Henry Azima.
PJC tried to explain how it works to me once but I never really got my head round it. He was very excited about it at the time but it seems to have died a death.
This gives a sort of idea how it works:

https://discourse.world/h/2019/10/07/An ... T-emitters