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Graph 1. The effect of projection screens on acoustical performance
Green - Unperforated screen in front of a HT312A
Blue - Perforated screen in front of a 1036A
Red - Cloth screen in front of a HT312A
3.8
The In-Wall and In-Ceiling Loudspeaker Systems Installation
3.8.1
General installation
The Genelec AIC25 In-Ceiling loudspeaker and AIW25 and AIW26 In-Wall loudspeakers share the
same basic structure with a separate loudspeaker enclosure and its dedicated amplifier module. All the
necessary hardware for mounting the loudspeaker enclosure into a wall structure is provided with the kit.
Optional rack mount adapters for the amplifier modules and preconstruction brackets for the enclosures
are available for straightforward installation work. The following gives a broad description of the instal-
lation procedure, but does not go to full detail of every stage. The complete Operating Manuals can be
downloaded at www.genelec-ht.com.
Matching Loudspeakers and Amplifiers
Each AIC25, AIW25 and AIW26 loudspeaker has been factory calibrated for optimum performance
with the individual amplifier it is shipped with. NEVER mix these matched amplifier-loudspeaker
systems with others in the installation process. The matching units are marked with the same ID
number.
Placement Considerations
If the loudspeakers are used in an application where their capability for precise sound imaging is
needed, we recommend that the loudspeakers are placed as far away from corners and the ceiling
as possible. If a diffuse sound field is preferred, for instance in a rear/side channel setup, you may
actually benefit from the acoustical reflections from nearby boundaries. In this case, place the loud-
speakers close to the ceiling or another wall, or have them face away from the reference listening
position, so that the proportion of reflected sound increases. We generally do not recommend this
as the loudspeakers perform best when they are facing towards the center of the listening area.
Installing the Loudspeaker Cables
The RAM1 and RAM2 amplifiers have separate power
amplifiers for the tweeter and woofer. Be sure to main-
tain correct polarity when connecting the loudspeaker
cables and be extra careful not to mix the tweeter and
woofer cables. Use a good quality 4-conductor cable and
make the cable runs as short as possible. Note that a
loudspeaker cable introduces some 'resistance' to the
current flow and so longer cable runs will require thicker
cables to overcome that problem. The connectors accept
a cable up to 6 mm
24
(9 gauge).
2
Cable gauge
Max length
2.0 mm
(14 AWG)
30 m (100 ft)
2
3.3 mm
(12 AWG)
40 m (131 ft)
2
5.3 mm
(10 AWG)
60 m (200 ft)
2
Table 6. Recommended maximum
lengths for speaker cables.
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