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14. Tug gently on the speaker to make certain
that the screws and bracket are properly
aligned and that the wall anchors are secure.
15. If the bracket is not held snug against the
wall by the screw heads, remove the speaker
from the wall, drive the screws in a little
further and then remount the speaker.
16. Once the speaker is mounted, the bracket
knobs can be loosened to “aim” the speaker,
and then hand tightened to keep the speaker
angled correctly.
VERTICAL MOUNT AIMED 45° DOWN
The Atrium Series mounting bracket is designed
so the speakers may be mounted in a vertical
45° downward firing position [Figure 15].
Use an anchoring device that can support the
weight of your Atrium model and be sure the
material you are mounting the loudspeaker
to can support its weight.
RECEIVER HOOKUP
Follow the hookup directions included with
your receiver. Strip 1/2" of insulation from each
of the two conductors of the wire to expose
the bare metal and twist each of the conductors
into a single un-frayed strand (so you have
two unfrayed strands).
Note that one of the terminals on the rear of
each speaker is red (+) and the other is black (–).
Make certain that you connect the wire from
the red terminal of your amplifier or receiver
to the red terminal on your speaker; and the
wire from the black terminal of your amplifier
or receiver to the black terminal on your speaker
[figure 16]. Most wire has some indicator (such
as color-coding, ribbing or writing) on one of the
two conductors to help you maintain consistency.
Customer Service Hours of Operation: Monday-Friday, 9AM-6PM EST polkcs@polkaudio.com 9
6. If you are certain there is a stud behind
the wall surface, drive #10 screws (not
included) through the wall and into the
stud [figure 11a].
7. If there is no stud behind the wall at the
chosen location, install #10 wall anchors
(not supplied) into the wall by following
the wall-anchor-manufacturer’s instruc-
tions. Always use two wall anchors and
two screws per speaker [figure 11b].
8. Drive the screws into the stud or wall
anchors, leaving screw heads protruding
1/8"~1/4" (3mm~6mm).
9. If you’re feeding speaker wire through a
hole in the wall behind the bracket, pull this
speaker wire through the hole in the bracket
before mounting the bracket [figure 12].
10. Screw the bracket directly into a weight-
bearing stud on the mounting surface.
Place the screws securely in the smaller
end of the keyhole slot. Do not leave
screw heads protruding.
Note: All Atrium loudspeaker cabinets have
molded ramps, which guide the speaker bracket
onto threaded protrusions to which the bracket
knobs attach.
11. Screw the bracket knobs into the protru-
sions but do not tighten them securely.
12. Secure the speaker to the bracket by sliding
the speaker between the bracket arms. The
built-in ramps will spread the bracket slightly
and guide the ends of the bracket onto the
threaded protrusions. A ratcheting system
holds the speaker in place and helps you fine
tune how you want to aim it. [figure 14].
13. Secure the loudspeaker to the bracket
by tightening the adjusting bracket knobs.
8 Polk Audio Customer Service 800-377-7655 (Outside USA & Canada: 410-358-3600)
FIGURE 11a & 11b: Use #10 screw for wall stud,
use #10 wall anchors and screw for no wall stud.
FIGURE 13: Slide the bracket down on
the screw heads to catch the keyhole slots.
11a Wall Stud
11b No Wall Stud
FIGURE 12: Feed speaker wire from wall
through bracket wire hole for easy mounting.
FIGURE 14: Turn the bracket knobs
to remove the bracket assembly.
FIGURE 15: Installation of the 45° bracket.
FIGURE 16: Make speaker connection
using binding posts.