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IW-100 Powered Subwoofer Installation Guide
Introduction
This woofer and enclosure were carefully engineered to deliver well-defined bass, while remaining virtually
invisible in a room. The enclosure is designed for installation during new construction or major remodel jobs to
fit between framing studs placed on 16” centers. The enclosure dimensions are 42” high X 14” wide X 3 ½ “
deep. The IW-100 is to be used as a powered subwoofer system in conjunction with the Phase Technology
P-200 Subwoofer Power Amplifier. During pre-wire it is recommended that you will want to run heavy gauge 2
conductor wire from your source location to the woofer location. We recommend 16 gauge or larger depending
on the length of the run.
Selecting the Woofer Location
When selecting a location to install the woofer, it is recommended the woofer be located near the left and right
speakers it will be supporting. That is to say in a traditional room with four walls, it is better to place the
woofer on the same wall or if not on the same wall, as close as possible to the main left and right speakers.
Avoid placing the woofer on an opposite wall from the main speakers whenever possible.
Room placement will affect the output of the woofer. It is recommended that the woofer be placed near the
floor or the ceiling and as close to the corner as possible. Avoid placing the woofer in the center of the wall or
the center of the room.
Getting Started
Before beginning your installation, it is recommended that you measure the bay (the space between studs) you
intend to install the woofer enclosure. Although 16” centers are the standard for framing construction, you will
likely find many variations. For the simplest installation and best results, select a bay that is clear of any
obstructions like electrical wiring, gas or water pipes. The woofer enclosure is intended to rest on the bottom
plate between vertical studs. The bottom (toe) plate is the 2” X 4” stud lying on the floor, to which the vertical
studs supporting the wallboard are nailed. . The height of the actual woofer in the enclosure was selected to
allow the return-air vent used to conceal the woofer and to provide adequate clearance for decorative base
molding up to 6” wide. Note: IN custom homes, the base molding may be wider than 6” requiring a cutout
around the air vent. You may wish to raise the woofer enclosure slightly above the bottom plate. Consult the
general contractor if this is a concern.
Step 1
Open each end of the carton and slide the woofer enclosure out of the carton. Note: Do NOT pull the woofer
enclosure from the packing carton using the speaker wires as a handle.
Step 2
Steel retaining straps are screwed to the face of the enclosure. Two lengths of the steel have been folded down
the sides for shipping. Straighten the steel strapping so that the ends stick straight out across the width of the
enclosure. Once the enclosure is placed between the framing studs, nail or screw the protruding strap ends to
the studs on each side of the enclosure. To avoid vibration between the studs, sheet rock and the enclosure
drive three wood screws per side through the studs and into the enclosure 4” down from the top, center
and 4” up from the bottom. This will retain the woofer in place prior to drywall finishing.
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Step 3
Once the woofer is in place you are ready to connect the speaker leads to the amplifier leads. The wire in the
enclosure is 16 Gauge plenum rated UL approved stranded copper wire. You may make connections a number
of ways including butt-connectors, wire nuts, electrical tape and solder. Soldered connections with heat-shrink
insulation, is the recommend way to splice the amplifier and woofer wires. If you need to remove the woofer
from the enclosure, please note the (+) terminals are indicated in red. Note: Low voltage electrical codes differ
by state. Check your local low voltage code before selecting a method of wire splicing.
Final Installation
Drywall will be installed followed by painting. The low resonant foam on the face and back serves as an
absorptive barrier between the cabinet and the wallboard. Once completed, install the return-air vent over the
woofer area. The vent is a standard 10” X 12” steel return-air vent that may be painted to match the room
colors. Using the vent as a template, center it over the woofer opening – mark the screw holes with a pencil.
Remove the vent and drill a 3/32” pilot hole making certain you drill deep enough to penetrate the enclosure.
Center the vent over the pilot holes making sure the vent openings are pointing toward the floor and insert the
screws supplied with the vent. Tighten the mounting screws until the vent is snug against the drywall. Use care
not to over-torque the screws to avoid distorting the steel vent frame.
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