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The Krix engineering team has extensive
experience in audio system design for
commercial
cinema
applications.
experience has shown that the size of the
room and therefore the listening distance
from the speakers, plays a significant part in
determining the ideal speaker system.
Commercial cinemas are normally designed
and calibrated to produce "reference level"
at the central seating area of the auditorium.
Reference
level
has
been
determined by organisations such as Dolby®
and THX® to be the ideal sound pressure level
(SPL) required to deliver the ideal dynamic
range, impact and realism of modern movie
soundtracks. A dedicated home cinema with
larger screen, particularly one with multiple
rows of seats, usually places viewers much
further away from the screen and speakers
than in a typical living room. Therefore, the
sensitivity of the speakers and the power
700
600
500
400
Amplifier
Power
(Watts)
300
200
100
Min. recommended
0
0
ROOM SIZE
output of the amplifiers need to be carefully
considered if the desired Dolby® reference
This
level is to be achieved.
The Series MX loudspeaker systems have
been designed to suit a range of room sizes
to best deliver a true cinematic experience.
Taking into account the average number of
seats each room size can accommodate, the
table below illustrates the ideal room size
range for each Series MX screen speaker
historically
system.
System
Recommended Room Size
Maximum Room Length
MX MAIN SPEAKER AMPLIFIER POWER
MX30
Power handling
(Program) limit
MX20
Power handling
(Program) limit
amplifer power
for 105 dB*
1
2
3
4
5
6
7
8
Room Depth (meters)
6
Note: - The Series MX system should be
chosen based on room size, rather than being
chosen based on budget or other limiting
criteria. Selecting an MX-20 system for a
room 10 meters in length could result in a less
than optimal experience for people sitting
near the back of the room. In this example,
the SPL in the back row of seats will be lower
than expected and clarity, intelligibility and
the overall impact of the movie sound track
will be significantly diminished.
MX20
MX30
20 - 35 m
30 - 140 m
2
7 m
14 m
MX-20 MAIN
MX-30 MAIN
9
10
11
12
13
2
14
15
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