Scanspeak R2904/700009 Tweeter - Revelator Range

Scanspeak R2904/700009, black version of Scanspeak Revelator R2904/700000.

Esoteric 26mm Revelator range tweeter featuring a ring radiator diaphragm and patented central phase plug. The large neodymium ring magnet is mounted within an airflow optimised rear chamber resulting in exceptionally low distortion and compression characteristics. Machined to very tight tolerances, this superbly engineered tweeter is testimony to the excellence of the Scanspeak brand.

Key Features:

• Anodised Precision Machined Aluminium Face Plate
• Large Ring Neodymium Magnet, High Output
• Patented Symmetrical Drive (SD-2) motor
• Unique Patented Phase Plug Design
• 1" Ring Dome Diaphragm 

There are 3 cosmetic variants of this tweeter:

Silver Faceplate, Silver phase plug :  R2904/700000

Black Faceplate, Silver phase plug :  R2904/700005

Black Faceplate, Black phase plug:  R2904/700009

Basic parameters:

Here's the full datasheet: