2.1 About this documentation
This documentation provides key features & benefits of the Dolby Speaker System 128 and how to install the
system in a typical cinematic exhibition environment.
2.2 CS128MH key features and benefits
The Dolby Speaker System 128 utilizes one CS128MH unit, which consists of an asymmetrical high-frequency
horn with a high-performance transducer, and a low distortion 12 inch midrange. This configuration yields
improved pattern and amplitude control within the high-frequency operating range, yielding smoother
response coverage to all seats in the auditorium.
Figure 2: CS128MH rear (left) and front (right)
• The high-frequency driver is a very low-distortion 75 mm titanium dome driver with a frequency response
up to 20 kHz.
• The mid-frequency driver is a high sensitivity 12-inch transducer with optimized FEM (Finite Element
Modeling) motor and suspension, optimized cooling for low power compression and an aluminum
demodulation ring for decreased distortion.
• The cabinet depth is optimized for use in auditoriums with minimal spacing behind the screen.
• The advanced input plate features a high-current, spring-loaded terminal block that enables quick
installation without the need for spade lugs or a crimping tool.
• The CS128MH assembly mounts directly to the top of a CS128LF unit and features independent horizontal
and vertical aiming adjustments.
• The ports on front and back of unit are used for natural convection cooling.
• The unique asymmetrical high-frequency horn design provides long-distance coverage to the back of the
auditorium from the top of the horn, while the bottom of the horn provides wider coverage and volume
shading for the audience closer to the screen. This provides greatly improved coverage for the auditorium
in comparison to conventional horn designs.
About this documentation
Dolby Speaker System 128 Owner's Manual
7
8800293 Issue 2
27 October 2021