Revel M22 - Manual (Page 12)

12
Acoustic Treatment Materials
The M22 features a high-order filter at
2.2kHz that optimizes its on and off-axis
response, minimizing degradations that
occur in overly “live” rooms. Placing
minimal acoustic treatment materials at
primary reflection points will reduce these
distortions even further. Ideally, acoustic
absorbers should be placed at the first
reflection points on the front and side walls
and either acoustic absorbers or diffusers
should be placed at the first reflection
point on the rear wall.
Because the listener’s eyes and ears are on
the same plane, the “mirror method” is an
accurate determinant of primary reflection
points. This method can be used to determine
reflection points for side walls, rear walls,
front walls, and even the ceiling. Applying
acoustic treatment materials to the side
walls is most important, followed by the
front wall, rear wall, and ceiling.
To determine reflection points using the
mirror method:
1. Once the M22s have been placed, sit in
the primary listening position.
2. Ask another person to slide a mirror
along the listening room walls.
3. Note the locations at which the person
sitting in the primary listening position
can see either M22. Be sure to look for
both M22s in the reflection on each
room boundary. These are reflection
points that require acoustic treatment
materials.
If acoustic treatment materials are not
available, hanging a rug over the reflection
points will help to reduce reflections in
overly “live” rooms. Carpeting the floor
between the loudspeakers and the primary
listening position and placing irregular
surfaces such as bookcases at first reflection
points will also help minimize strong
reflections.
MAKING
CONNECTIONS
The M22 features gold-plated binding posts
and shorting-straps.
CAUTION
• Never make or break connections
unless all system components are
powered off.
Before making connections, note the
following:
• Use high-quality loudspeaker cable
with a maximum total loop resistance
of 0.07ohms or less (for each wire run).
Refer to the table at the top of the next
column to determine the appropriate
maximum wire gauge.
Maximum Wire Gauge
Gauge Length Length
(AWG) (Feet) (Meters)
6 87 27
7 69 21
8 58 18
9 43 13
10 34 10
11 27 8
12 22 7
13 17 5
14 14 4
15 11 3
16 9 3
17 7 2
18 5 2