These high-quality sound projectors have been developed according to the latest knowledge in plastic technology. The sound pressure decrees nearly to the level of horn speakers. They have a high wide band, such as dynamic speakers. 
Both models (CSP-115 and CSP-220) have a built-in wide range „twin-cone“ speaker chassis. Each of the integrated transformer tappings 100 V, 70 V and also 50 V have respectively three power levels. 
An excellent sound characteristic and the dynamic of these sound projectors gives best results for speech articulation as well as for a very good music performance. 
It is possible to rig up a number of these sound projectors, on top of each other, by use of similar phasing of the signal connection. This effects a narrowing of the vertical  transmission angle at 1/4/8 kHz, which has the same effect as a column speaker. 
Of course the CSP-115 and CSP-220 are both able to be low-impedance connected.

Please consider the following features:

• Both models are established in an equal design, scratch-resistant and impact resistant plastic material.
• The colour of the case is white, similar to RAL 9010, the folding mounting bar is creme white, similar to RAL 9001.
• The form and interior equipment of the sound projectors is configured, so that the favoured polar pattern of the sound radiation is assured.
• The required connection or impedance mode is done with clamp insulated wires (well marked). The cable is led out at the rear side of the unit.