OWNER'S PROJECTS - Speaker designs and DIY speaker projects with special speaker cabinets and enclosures.

Ribbon Loudspeakers by Newform Research.

OWNERS PROJECTS

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Good afternoon this is Sweden calling . . .

I have promised you some pictures of my older speakers made 1998.
I have told you before that I have built several pairs of them to very satisfied customers in Sweden. The model name is:

Atmosphere Systems DNR815

In this model I use 1 Dynaudio 20W75 woofer in a sealed cabinet together with your R15 ribbon. The filter use MIT condensators and ribbon coils.

They are built so you easily can remove the upper part around the ribbon band for better sound.

Hope you can use the pictures.

Best regards and waiting for your comments.

Folke
- outside Gothenburg in Sweden. The bigger system I have told you about is getting along very well - they sound great together with the Behringer crossover. I will take some pictures when they are all finished.

It is friday afternoon and I have just put together one of my new speakers I use active crossover from Behringer at about 1100 Hz. I have just listened for an hour or so - but already I have a loudspeaker with much more detail and the focusing point where the two Dynaudio and your ribbon add together is exactly that sharp as I hoped it to be - at my listening position 3-4 meters away. I would like you to see...

Best regards
Folke

One of my Newform Research NHB 45s, built from a kit. The midbass (sealed) enclosure is made from an 11" diameter paper cylinder. Construction using the paper cylinders was very challenging, but the results were worth the effort. The cylindrical shape has almost completely eliminated the resonances associated with conventional box design.

Note that the NHB 45 kit is no longer available, although you could still put together this same speaker by sourcing the ScanSpeak 5-1/2" midbass driver elsewhere (i.e., Parts Express).

Note also that there is no passive crossover in this design--the ribbon drivers being driven by (2) T8 OTL amps, while the mid-bass are driven by a 60wpc Rotel amp, all fed through a Marchand electronic crossover operating at 900 Hz. The Rotel amp is soon to be replaced by another pair of T8 OTLs.

View with the grille removed. The midbass enclosure is finished with Zolatone, a faux stone paint. My Velodyne ULD-18 II subwoofer (not shown) is finished in the same Zolatone.

Well, I finished the speakers, hung them and then tried them out. You may not remember, but the speakers are actually two speaker systems in one cabinet in each channel. They are separately amplified. I had a big problem running the wires for all of the separate channels (two discrete sub woofer channels also in the baseboard, plus a center channel for surround sound (which as you said, I don't need). When I hooked it all up, I found that I had an open circuit in the left channel reflecting speaker circuit from the speaker to the amp. Rather than fixing it, I simply off the amp and sat down to enjoy the extraordinary sound of the mains. It was breathtaking. The sound field was wider than I have ever heard in any listening environment.

Next I hooked up an old stereo test record that I had around and checked out the various frequencies. Everything was great. There was no audible distortion and the sound was smooth to the bottom of the record frequency of 28.5 hz. My Golden retriever was not so happy with the warbles though I was all smiles.

It was simply awesome. I guess that the room and speaker combination must have just clicked and it all came together.

Jim C.

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Email: ribbons@newformresearch.com Tel: 705.835.9000