uncommonly on 12" centers). Roofs typically are constructed of wooden
rafters—nominally 2" x 6" or deeper, but measuring 1½" x 5½” and located on 16"
centers (but not uncommonly on 24" centers). Ceilings are usually backed by 1" x
3" strapping leveled beneath the floor joists or roof rafters and located on 16"
centers.
Electrical cables run to, and most often from, all electrical boxes—which are
grouped on circuits. Plumbing supply, drain and vent lines run to and from all
plumbing fixtures—which are grouped on vertical risers. Heating supply lines
circulate through radiation fixtures—which are grouped in zones off vertical risers.
HVAC ductwork runs to all supply grills and from all return grills. Control wiring
(sometimes tubing) runs to all controls.
Corner bay locations should be avoided since at least one corner bay is usually
smaller than normal, hence the speaker will not fit, and closeness to the side wall
will cause some unevenness in frequency response. Electrical power wiring
should not run close to the speaker or it's audio supply; crossing away from the
speaker and its supply has minimal effect.
Tricks of the Trades—Nothing's Plumb, Square, or True
All people in construction realize that it is an exacting but inexact craft—nothing
is exactly, absolutely plumb, square, or true. The craft is to understand and
respect the tolerances of materials, tools, makers, and users—what will look right
to the eye, is reasonably possible to build, and will retain it's position over
years—within the budgets of money and time. Planning, measuring, and
coordinating are important; but conflicts, tradeoffs, and imperfections are
inevitable in the final construction. Pre-construction drawings are very valuable to
further the process mentally before the physical begins. Post-construction, as-
built drawings are valuable to assure performance and aid modification.
However; no drawings will be entirely complete or consistent with the
construction. Proceed with an open and responsive mind. Prepare to be
surprised, challenged, and rewarded—to solve the many small riddles along the
path to completion.
VII. INSTALLATION
These speakers use a particularly effective mounting technique with toggle style
mounting clamps. They are so named because the mounting clamp toggles out
from a rest position prior to tightening down. As shipped, this mounting clamp
parks on a flat on its mounting tower, thus staying out of the way for easy
insertion of the system into the wall cutout. When a screwdriver is applied to the
mounting screws it first turns the clamp 90 degrees, removing it from its resting
place, and then brings the clamp down a track in the tower. With further
tightening it finally clamps the wall firmly. This clamping style gives firm clamping
for freedom from rattles, and great convenience of installation. The CW800E has
16 of these clamping assemblies. The CW600E has 12.
A template is provided for marking the speaker cutout. It has a series of slots for
tracing the cutout and also an outline of the system to confirm that the flange
won't interfere with any wall features.
At each intended speaker location measure and mark with a pencil the intended
center of the speaker. Near the intended center make a small initial exploratory
hole with an awl or (worn) screwdriver and hammer, a wallboard cutout saw, or a
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