The Revelator series has for years been celebrated for producing the best sounding electro dynamic transducers in the world. Since ScanSpeak was sounded in 1970, the audio engineers and R&D experts working on the line have been on a quest to create drivers that reveal all the sound in recordings, hiding nothing from the listener. This quest has resulted in several revolutionary inventions that remove distortion in the magnet systems and in the moving parts of the speaker. The philosophy is that the sound has to be very dynamic, giving a perfect transient response and providing tonal balance.  In the Revelator tweeters, additional enhancements have been made to reduce distortion and power compression, and to optimize airflow in the chambers, producing several unique tweeter designs.

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Scan Speak 1" Dome Tweeter with Diffuser 4Ω

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D2904-980000
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ALUMINIUM DOME WITH DIFFUSER CAP
Symmetric Drive technology that almost eliminates electrical phase shift.  A carefuly designed chamber minimises air noise and compression.  The geometry of the light-weight aluminium dome causes the typical characteristic “break-up” peak to appear far beyond the audible range. A special diffuser is used to equalise the response in the upper octave.  SD-2 motor low compression, non-resonant chamber Revelator design. This premium tweeter is characterised by a very clean and open sound. 

Manfacturer Datasheet 

Scan Speak 1" Dome Tweeter 8Ω

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D2905-990000
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Textile diaphragm 1" similar to the D2905/97 above with an over-sized 130mm concave face plate made from machined aluminium. Gasket backed. Symmetric Drive Technology which involves a copper ring on the pole that extends past the voice coil, curving into the dome chamber. Double damped, optimized chambers, acoustically damped & anti-resonated. Flagship tweeter as used in many exceedingly exotic speaker systems. 

Manfacturer Datasheet

Scan Speak 1" Ring Radiator 4Ω
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R2904-700000
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R2904-700000_A
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Latest style and technology achieving Super-Tweeter status!
Incredible bandwidth of over 80KHz giving unsurpassed phase and tonal characteristics with a warm sound that improves over even the ribbon tweeter. “SD-2" neodymium magnet motor system. Machined aluminium face plate, phase plug and non-resonant chamber. SACD and DVD-A are 100KHz in bandwidth. Super tweeters also improve phase and transient responses below 20Khz. 

Manufacturer Datasheet