Amina AIW750i - Manual (Page 25)

Setup tips
>
>
>
>
>
>
>
>
APU750i
Your Evolution Series speaker must be used with the supplied APU750i protection device
or another approved protection device. For iN models (supplied without an APU750i) an
APU-RS8i rack mount device or an Amina approved active device should be used. Please
refer to the instructions supplied with the APU750i devices and full warranty information
for further details.
Installation Backboxes
The AIW750i have been designed for optimum sound quality when used with Amina
BackboxCV345 and BackboxCV200. We recommend that they are used wherever possible
in a cavity type installation. If our basic fixing block kit is used you may find that the low/
mid frequencies are reproduced less accurately, and a possibility of increased sound
transmission between rooms. Any effect will be very much installation specific.
When installed into solid walls or ceilings using the Amina BackboxSW, you may find that
your AIW750i reproduces slightly less low frequency output compared to a BackboxCV
installation. Also, depending on the building construction, there may be significant
mechanical sound transmission into adjacent rooms/properties (see inside front cover).
AIW750i Audio Characteristics
The AIW750i speaker generates sound in a similar way to an acoustic musical instrument.
The speaker’s front face is effectively the “musical” soundboard and the sound waves
generated from it are diffuse and are dispersed over a very wide angle. This means that
loudspeaker positioning is far less critical than with conventional speakers. Additionally,
just like the acoustic musical instrument, the AIW750i has excellent room filling abilities.
The AIW750i is a planar device and this feature is further enhanced when it is flush
mounted into your wall or ceiling. Being planar (or flat) means that the audio’s arrival
time to the listener is the same for all frequencies, i.e. there is very little phase distortion.
Therefore the AIW750i (and other planar devices such as electrostatic loudspeakers) can
reproduce subtle nuances on a recording with incredible accuracy.
In addition to the above characteristics, the radiating surface of an AIW750i is very stiff
and undergoes very small amounts of movement in order to generate high sound pressure
levels. This means that the AIW750i is inherently “fast” making it a highly articulate
loudspeaker.
Wall or Ceiling Placement
The AIW750i is suitable for both wall and ceiling installations. When the most uniform
audio coverage in a room is required, space the speakers evenly in the ceiling. However, if
the room has a height greater than 6m (19’), Amina suggests installing them in the walls at
a height of around 1.8m (6’).
In dedicated listening rooms where AIW750i speakers are used in stereo or multi channel
systems, position them in the walls so that the center point of the AIW750i HF panel
speaker is approximately 1 – 1.8m (3.5 - 6‘) from the floor. This will give excellent results, but
don’t worry, if this is not possible to achieve in your room, the audio characteristics of the
AIW750i make exact positioning according to stereo 5.1 and 7.1 conventions far less critical.
21