Hi Frank,
Your very welcome.
Stage Accompany Ribbon Compact Driver.
In 1983 Stage Accompany started an ambitious project with the aim of making a different type of loudspeaker suitable for professional applications.
This was based on one fundamental consideration; the present amplifier output must allow the development of the high- loudspeakers which no longer use the compression mechanism, to produce a pure sound, particularly at the customary high outputs.
Ten years of development activities have finally resulted in the SA8535 Compact Driver. An unparalleled new type of medium and high-frequency loudspeaker.
The SA8535 is a patented ribbon type loudspeaker without the drawbacks of conventional compression drivers.
The special and simple design of the SA8535 is probably the most important reason for the unprecedented sound quality produced by this ribbon type loudspeaker.
Moreover, the recent development of new magnet material and cast-iron plastic film has contributed to the creation of the SA8535.
Link to specs, graphs and pictures (including prototypes) of the SA820:
https://www.facebook.com/pg/StageAccompanyBV/photos/?tab=album&album_id=242757382542074
Link to specs, graphs and pictures of the SA8525:
https://www.facebook.com/pg/StageAccompanyBV/photos/?tab=album&album_id=360982927386185
Link to specs, graphs and pictures of the SA8526:
https://www.facebook.com/pg/StageAccompanyBV/photos/?tab=album&album_id=360982180719593
Link to specs, graphs and pictures of the SA8535:
https://www.facebook.com/pg/StageAccompanyBV/photos/?tab=album&album_id=360945854056559
Who was first the Philips RSQ8P or Stage Accompany SA8520?
Many people think that the SA ribbons are clones of the Philips RSQ8P Isophase driver, are/were developement and manufactured by Philips and that Philips was the one that released this product first,
not completely true.
Philips and Stage Accompany did co-operate only on the development of the first big ribbon drivers. The smaller Philips Isophase tweeters got their attention of former CEO and founder of SA Ed Wijnker, he and others at SA were very interested to use such a driver in a PA envirement.
The products of that co-operation were; the Philips RSQ8P (for the HiFi market) and the Stage Accompany SA8520 Ribbon Compact Driver (for the Pro Audio market).
The RSQ8P was manufactured in house by Philips (Dendermonde, Belgium) and the SA8520 in house by Stage Accompany (Hoorn, The Netherlands).
At that time (1986) the diaphragm (the ribbon foil) for the RSQ8P and SA8520 was solely manufactured by Philips.
Nowadays SA manufacture the diaphragms in house for all SA RCDs; SA8520, SA8525, SA8526 and SA8535.
Note: the SA8520 diaphragm can be used, with a slight modification on the terminal holes, for the Philips RSQ8P.
All successors of the SA8520 RCD (Ribbon Compact Driver) like the SA8525, SA8526 and SA8535 were solely developed and manufactured by Stage Accompany.
Salient detail, the Stage Accompany SA8520 was earlier launched then the Philips RSQ8P.
SA8520 diaphragm replacement kit.
Chart with the SA8520, SA8525, SA8526 and early version of the SA8535.
The final SA8535 with optional horn.
Greetz Webbie...