Field Coils

[RobsterD]

Just installed some Voxativ AC-X field coils in my Oris horns - results are staggering :D
Field coil is where it's at replaced some very nice AER MD3's
just need to see if I can fit some 15" bass field coils in the bass cabs :)

http://i886.photobucket.com/albums/ac68/RobsterD/CIMG0633_zpse25c52ab.jpg
http://i886.photobucket.com/albums/ac68/RobsterD/CIMG0634_zpsa4825eb9.jpg
http://i886.photobucket.com/albums/ac68/RobsterD/CIMG0635_zps8a0d5a39.jpg
http://i886.photobucket.com/albums/ac68/RobsterD/CIMG0637_zpsd324b17b.jpg

[Ali Tait]

Very nice!

[walpurgis]

Interesting, never heard field coil drivers.

I don't know much about them, but presumably they are DC energised from a very clean power supply. Otherwise the ingress of hum would be a problem.

I just bought some (very nicely made) L Cao full range 8" units from China and hear that now Mr. Cao has released a field coil version. I may investigate.

What is the power consumption of yours by the way?

[Ali Tait]

I heard some 70 year old German ones at a previous Owston, sounded great.

[RobsterD]

cheers Ali
Hi Geoff was looking at the L Cao awhile back they look interesting.
These field coils work between 6-18v DC,recommended PSU voltage is 12v and battery ,currently using an Optima "Yellow Top"
Again old making good with new manufacturing techniques

[walpurgis]

Again old making good with new manufacturing techniques

Yes, Hi-Fi just seems to go round and round technology wise. Little new comes along. Moving coil speakers have been around over a century! Maybe we'll get a free air energised focused plasma Hi-Fi speaker one day (yes I know there are and have been plasma drivers).

[daytona600]

Heard some WE field coils once made in 1928 , staggering if you can house speakers 12feet high

[RobsterD]

battery is best !
but the Optima car battery is shagged so butchered a Keysource UPS I had - will probably run four 7.2Ah per field coil
http://i886.photobucket.com/albums/ac68/RobsterD/CIMG1310_zps38ffbaa4.jpg

[realysm42]

That's a mad set up you've got there, very unique!

[RobsterD]

That's a mad set up you've got there, very unique!

Cheers
Currently powered by a pair of these ....SIT's

http://i886.photobucket.com/albums/ac68/RobsterD/CIMG1237_zps2d217813.jpg
http://i886.photobucket.com/albums/ac68/RobsterD/CIMG1242_zps71798a32.jpg
http://i886.photobucket.com/albums/ac68/RobsterD/CIMG1240_zpsbb1ba616.jpg

[awkwardbydesign]

Still think the grain should go the other way. Lol!