Avalon Acoustics Sentinel - Manual (Page 56)

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Summary
When the listener and system are situated properly within a carefully planned
and set-up listening environment, the Sentinel multi-way system can deliver
high-energy output with point-source accuracy. It is crucial to begin with a
relatively large room that is acoustically treated reasonably and to follow the
set-up guidelines detailed in Chapter 9, Room Acoustics and Speaker Position.
The listener should be seated in a comfortable chair or sofa that is centered
between the loudspeakers. At the preferred minimum distance of three
meters from the system (the edge of driver wave front convergence), you
can expect a natural stage presentation and realize the Reference System's
potential for outstanding clarity and focus. On certain multi-miked recordings
however, the high frequency information may appear slightly elevated within
the sound stage. At four meters, the energy fields begin to blend more
integrally and tonal balance becomes more correct. The image focus and
size as well as the overall harmonic structure is improved, and the music
integrates into a coherent whole.
110 cm
3 meter path length
Figure 10.1 - Convergence of the wave front occurs with the listener ear
situated approximately 110cm (43 1/2") from the floor and a preferred
minimum of 3 meters (118 inches) from the system.