Avalon Acoustics Isis User Manual
Page 14
14
First Reflection Points
Since the ear/brain system tends to integrate the sounds arriving within a 10
millisecond time window, it is important to control the early reflections arriving
from the sidewalls to the listening position. A hard-surfaced wall can produce
a strong frequency-dependent reflection that can interfere with the
reproduced sound-stage, as well as change the perceived tonal balance of
the system. Therefore, damping these first reflection points is strongly
recommended. Please refer to Section 8.3, Early Reflections, beginning on
page 23, for further information.
Corner Treatment
It is important to control the first reflections of low frequency sound, which
normally occur at the corners behind the loudspeakers. These reflections can
cause significant distortions in phase and amplitude, resulting in muddy bass
definition and smeared bass transients. Placing DAADS (more information
available at
) at the room corners can
significantly control these bass colorations and restore the quickness of bass
transients.