Eminent Technology fan woofer:
Bozhen woofer and tweeter:
This woofer has 2 motors/coils, and works very similar to the LAT from Tymphany in opposed motions.
The tweeter has a conventional voice coil, and a suspended diaphragm by way of rods from coil to surface. Looks and operates like ribbon, but very low HD and conventional VC.
Another rod-coupled unit, Heil Transar:
Morel weird woofer, on the left below:
Adire Parthenon, 6" to 12" scalable Xmax. Springs are both suspension and tinsel leads. 24" plate pressurized the room:
Phoenix Gold Cyclone was a waveguided approach to rotary woofers in a horn construct. 2 orifices with a spinning flat membrane from the center. Weird to watch:
Tymphany LAT woofer (250/500/700 models; 250 pictured in my NEHD design), dual opposed motors and rod driven membranes:
Airblade:
I WISH I COULD FIND THE KOVE!! It literally had a large surround as the diaphragm, and had a small tweeter shoved into the middle. It was mid '90s to mid '00s time frame, and car-audio targeted. Limited to about 600Hz on the bottom. It looks a LOT like the Fibona driver below... EXCEPT that the Fibona is a rigid membrane, and the Kove was basically a surround.
Fibona:
JVC offset former woofer:
FAL driver, or larger FAL-C driver, meant as full-range:
Manger dual-voice-coil bending wave driver, heard them once and was not impressed:
Morel Powerslim Integra, a convex coaxial:
What Pepe posted is about a 10" equivalent Cerwin Vega DOME woofer, FWIW.
Later,
Wolf
Bozhen woofer and tweeter:
This woofer has 2 motors/coils, and works very similar to the LAT from Tymphany in opposed motions.
The tweeter has a conventional voice coil, and a suspended diaphragm by way of rods from coil to surface. Looks and operates like ribbon, but very low HD and conventional VC.
Another rod-coupled unit, Heil Transar:
Morel weird woofer, on the left below:
Adire Parthenon, 6" to 12" scalable Xmax. Springs are both suspension and tinsel leads. 24" plate pressurized the room:
Phoenix Gold Cyclone was a waveguided approach to rotary woofers in a horn construct. 2 orifices with a spinning flat membrane from the center. Weird to watch:
Tymphany LAT woofer (250/500/700 models; 250 pictured in my NEHD design), dual opposed motors and rod driven membranes:
Airblade:
I WISH I COULD FIND THE KOVE!! It literally had a large surround as the diaphragm, and had a small tweeter shoved into the middle. It was mid '90s to mid '00s time frame, and car-audio targeted. Limited to about 600Hz on the bottom. It looks a LOT like the Fibona driver below... EXCEPT that the Fibona is a rigid membrane, and the Kove was basically a surround.
Fibona:
JVC offset former woofer:
FAL driver, or larger FAL-C driver, meant as full-range:
Manger dual-voice-coil bending wave driver, heard them once and was not impressed:
Morel Powerslim Integra, a convex coaxial:
What Pepe posted is about a 10" equivalent Cerwin Vega DOME woofer, FWIW.
Later,
Wolf
Turk,
Those Panasonic/National drivers have the same elliptical crease/suspension as some larger ones from an organ. The quality really impressed me.
dave
Those Panasonic/National drivers have the same elliptical crease/suspension as some larger ones from an organ. The quality really impressed me.
dave
And a set of inside-out basket 5” that predate the Volt’s by some time. This set by Phillips, but i have had some Dual with the sae kind of basket topology.
dave.
dave.
Vance Dickason did a Test Bench article...
Bozhen CQ76
https://audioxpress.com/article/test-bench-an-updated-cq76-ribbon-tweeter-from-bozhen-new-audio-lab
CurtC used it in a design with dual Rival woofers.
Rick Craig was known to use it a lot, and did one with the Purifi. AFAIK, he was the US distributor, and they ran about $175 each.
company website:
http://www.bzspeakers.com/ribbon76_en.html
and newer slightly larger and lower reaching edition CQ76B:
http://www.bzspeakers.com/ribbon76b_en.html
Bozhen CQ76
https://audioxpress.com/article/test-bench-an-updated-cq76-ribbon-tweeter-from-bozhen-new-audio-lab
CurtC used it in a design with dual Rival woofers.
Rick Craig was known to use it a lot, and did one with the Purifi. AFAIK, he was the US distributor, and they ran about $175 each.
company website:
http://www.bzspeakers.com/ribbon76_en.html
and newer slightly larger and lower reaching edition CQ76B:
http://www.bzspeakers.com/ribbon76b_en.html
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The Co-Drive you called it was known as the Bass-Pump. I forgot about that one, or I would have posted it too.
Wolf
Wolf
Yep. The website is still up but I don't believe I recall any finished products using it. Seems like it was vaporware. Looks hideously complicated and expensive to assemble. Lots of tolerance stack and room for error.
The Poly-Planar P40's, made almost entirely of styro-foam. Used these in a pair I built 30 years ago. Put them in a 1.5 cu/ft box with a 10" passive radiator on the rear.
Worked out well considering no TS parameters available. I really liked the sound and received many good comments from friends.
Worked out well considering no TS parameters available. I really liked the sound and received many good comments from friends.
Attachments
A friend in the 70's had a Yamaha guitar amp (TS 60, I think) which had two rectangular speakers with styro-foam cones.
I liked the sound so much I wanted to buy the amp just to use the speakers on my stereo.
So when the P40's came along, I had to give them a try.
I liked the sound so much I wanted to buy the amp just to use the speakers on my stereo.
So when the P40's came along, I had to give them a try.
no sorry people lie all the time these things sounded absolute crap...there was no bass to speak of as there was no displacement...
Member
Joined 2003
All these years and were still attaching speaker motors to sheets of rigid foam like its the next best thing...