Infinity Primus-PC-351, Primus-P-253, Primus-P-163, Primus-P-153, Primus-P-143 Owners Manual

Owner’s Manual

P143
P153
P163
P253

P363
PC251
PC351

INFINITY PRIMUS

Couch/listening position

Stereo player

Right
channel

Left

channel

Couch

Front
right
channel

Front

left

channel

Center

channel

Surround

right

channel

Surround
left
channel

Infinity subwoofer

(optional)

Couch

Front
right
channel

Infinity subwoofer

(optional)

Front
left
channel

Center
channel

Surround

right

channel

Surround
left
channel

®

SERIES

The Primus series of loudspeakers continues the longstanding Infinity
commitment to accurate sound reproduction. Our proprietary MMD®
(Metal Matrix Diaphragm) drivers, precision dividing networks and rigid,
well-braced enclosures combine to deliver uncompromised performance
in any stereo or multichannel home theater system. In addition, Primus
series speakers are magnetically shielded for safe placement adjacent to
a television.

UNPACKING THE SPEAKERS

If you suspect damage from transit, report it immediately to your dealer.
Keep the shipping carton and packing materials for future use.

PLACEMENT

Stereo

Before deciding where to place your Primus speakers, survey your room
and think about placement, using Figure 1 as a guide and keeping the
following points in mind:

For best results, place the speakers 6 to 8 feet (1.8 to 2.4 meters) •
apart.

Position each speaker so that the tweeter is approximately at ear level.•

Generally, bass output will increase as the speaker is moved closer to •
a wall or corner.

Refer to the “Home Theater”section on this page if you plan to use the •
speakers for home theater reproduction.

Home Theater

For front-channel use, place one speaker on the left and another on
the right of the television monitor. Since the speakers are magnetically
shielded, you can place them without worrying about their distorting the
TV picture.

For surround-sound use, place the speakers alongside the listening
position. Final placement depends on room acoustics, availability of space
and your listening preference (Figures 2 and 3).

Place the center-channel speaker on top of or directly below the
television. Aim it toward the listening area.

NOTE: An Infinity powered subwoofer will add impact and realism to both
music and film soundtracks. Contact your Infinity dealer for recommendations
on subwoofer models.

Figure 1. This overhead view shows a typical stereo-speaker plan.
Experiment with speaker placement to obtain the best bass level and stereo
imaging in your room.

Figure 2. This overhead view shows a typical home theater plan. The left/
right rear channels are for a seven-channel system. The center rear
channel is for a six-channel system.

Figure 3. This figure shows an alternate layout, which may be more
suitable for some rooms. The left/right rear channels are for a seven­channel system. The center rear channel is for a six-channel system.

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INFINITY PRIMUS SPEAKERS

WALL-MOUNTING THE P143, P153 AND

Figure 4.

– +

Keyhole mounts

1/4" - 20 threaded insert
(P143 only)

PC251

We have designed the P143, P153 and PC251 speakers to mount directly
onto a wall. Each speaker has two keyholes on the back and will require
two 1-1/2" (38mm), #10 wood screws fastened to a wall stud. If a wall
stud is unavailable, install an anchor appropriate for a 1-1/2", #10
screw.

NOTE: You are responsible for the correct selection and use of mounting
hardware (available through hardware stores) that will ensure the proper
and safe wall-mounting of the speakers.

CHANGING THE P253 AND P363 FEET

The P253 and P363 feature attractive outboard feet, installed at the
factory. However, if you would like to replace them with the less visible
inboard feet (included), follow the instructions below.

Remove the four feet on the bottom of the speaker by loosening the 1.
screw in each foot. Keep the screws for later use.

Remove the rubber plug from each inner hole (and save it for possible 2.
future use).

Attach the black inboard feet to the inner holes from which you just 3.
removed the rubber plugs. Use the same screws that you just removed.

Tighten the screws securely, using a handheld Phillips (+ tip) 4.
screwdriver. Do not use a powered screwdriver of any type.

Step 1.

Mark the positions on the wall where you would like to place the mounting
screws.

Step 2.

Fasten two 1-1/2", #10 wood screws to the wall using the markings
from Step 1 as your guide. Leave an 11/16" (17.5mm) space between the
wall
and screwhead. If a wall stud is not available, use an appropriate anchor.

Step 3.

Place the speaker on the wall by aligning the keyholes on the back of the
speaker to the screwheads on the wall. Once positioned properly, the
speaker should slide down slightly and become secure.

The P143 also allows you to use third-party wall brackets using the
1/4"-20 threaded insert located beneath the keyhole mount. Consult the
wall-bracket manufacturer to select the proper bracket.

CAUTION: Floorstanding (tower) loudspeakers have a high center of
gravity and may become unstable and tip over during earthquakes or if
they are rocked, tipped or improperly positioned. Consider anchoring
these speakers to the wall behind them, using the procedures and
hardware customary for anchoring bookcases and wall units. You are
responsible for proper installation and proper selection of hardware.

INFINITY PRIMUS SPEAKERS

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