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APU150 / APU350 / APU550
Your Evolution Series speaker must be used with the supplied APU protection device or
another approved protection device. For N models (supplied without an APU) an APU-RS8E
rack mount device or an Amina approved active device (such as Cloud EQ in commercial
systems) should be used. Please refer to the instructions supplied with the APU devices and
full warranty information for further details.
Installation of Backboxes
The Evolution Series have been designed for optimum sound quality when used in the
Amina BackboxCV 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, but any effect will be very much installation specific.
When installed into solid walls or ceilings using the Amina BackboxSW, you may find
that your Evolution Series 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).
Evolution Series Audio Characteristics
The Evolution Series 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 Evolution Series has excellent
room filling abilities.
The Evolution Series 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 Evolution Series (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 Evolution Series is
very stiff and undergoes very small amounts of movement in order to generate high sound
pressure levels. This means that the Evolution Series is inherently “fast” making it a highly
articulate loudspeaker.
Wall or Ceiling Placement
The Evolution Series are 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 Evolution Series speakers are used in stereo or multi
channel systems, position them in the walls so that the centre point of an Evolution Series
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
Evolution Series make exact positioning according to stereo 5.1 and 7.1 conventions far less
critical.
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