System Components: The Polk
Audio RM6900 home theater speaker system is a 5.1-channel speaker system that
gives you an option for adding additional matching satellites for 6.1- or
7.1-channel surround. The system includes two tabletop speaker stands, a center
channel cradle, and 5 bolt-on keyhole wall mounting brackets.
Materials: The satellite
speaker enclosures are made of stylishly curved anodized aluminum with gray
trim. The shape of the heavy-duty non-resonant aluminum enclosures breaks up
internal standing wave resonance to give you pure, lifelike sound.
Drivers: The drivers used in
the RM6900 speaker system are as follows:
- Satellite Midranges: The
satellites feature 3-1/2" Mineral-filled Polymer Dynamic Balance midrange
drivers for clear, distortion-free midrange, even at high volume levels. The
front stage speakers use two midranges per enclosure, while the rear
surround satellites use one midrange driver per enclosure.
- Satellite Tweeters: The
satellites feature high-performance 3/4" Dynamic Balance Silk/Polymer
Composite dome tweeters for sweet highs and more lifelike imaging.
- Subwoofer: The powered
subwoofer uses a 12" Mineral-filled Polymer Dynamic Balance woofer with a
Power Port: The satellites and
center speakers feature Power Port Bass Vents hidden under the grilles to extend
and strengthen their lower-midrange performance for a seamless blend with the
Satellite Mounting Options: The
satellite speakers can be mounted in a number of ways:
- Front Speakers: The two
RM6901 front speakers can be mounted on the supplied tabletop stands,
wall-mounted using the supplied bolt-on keyhole slot brackets or optional
wall mounting brackets, or mounted onto optional floor stands that attach to
the threaded inserts.
- Note: The front
speakers do not have a flat base, so they cannot be placed on a shelf or
tabletop without a stand.
- Center Speaker: The RM6902
center speaker can be wall mounted using the supplied bolt-on keyhole slot
bracket or an optional wall mounting bracket, or placed in the supplied
center speaker cradle.
- Surround Speakers: The two
RM6801 surround speakers can be placed on a shelf or table top without a
stand due to its flat base. (Self adhesive rubber feet are supplied). The
speakers can be wall mounted using the supplied bolt-on keyhole slot
brackets, or optional wall mount brackets. The speakers can also be placed
on optional floor stands if desired.
Note: The system
includes heavy-stock paper templates to assist you with marking the
screw holes for the wall mount brackets.
Tabletop Stands: The front
satellites can be mounted to the supplied tabletop stands using the supplied
hardware and the speaker's two threaded inserts. The stands are 10-1/8" high and
the base is 6-3/4" in diameter. The overall height of the speaker on the stand
is 15-11/16". The stand includes an integrated speaker wire channel for a clean
Bolt-on Keyhole Slot Brackets:
The RM6900 system includes 5 wall-mount brackets for the satellites (three
2-hole brackets for the front satellites, and two 1-hole brackets for the
surrounds) that hang on the wall using keyhole slots. These brackets bolt onto
the back of the speaker using the supplied hardware and the built-in threaded
inserts. On the wall, the screws should be firmly screwed into a stud or used
with a wall anchor (for the large brackets, two screws spaced 2-1/4" apart, or
one screw for the small brackets.). The large brackets can be oriented
vertically or horizontally. The speaker can be angled up to approximately 15° in
either direction while wall-mounted on these brackets. The brackets have speaker
wire guides, and mount the speaker approximately 3/8" away from the wall.
Center Speaker Cradle: The
center speaker can be placed horizontally below or above the TV or monitor using
the center speaker cradle. While on the cradle, the speaker can be aimed up or
down toward the listening area.
Speaker Terminals: The
satellites each feature high-quality 5-way binding post speaker terminals for a
secure and convenient connection. You will need to remove a plug that's inserted
in the center of the binding post if you wish to use single or dual banana
Video Shielded: The RM6900
satellite speakers are magnetically (or video) shielded for safe placement near
your TV or computer monitor without causing picture interference.
Additional Speakers: If you
wish to use the RM6900 for a 6.1- or 7.1-channel surround sound system, you can
purchase additional RM6901 (107RM6901) single satellites, RM6902 (107RM6902)
single center channel speakers, or RM6801 (107RM6801) surround speakers to fill
out your speaker requirements.
Materials: The RM6900 subwoofer
is made of durable MDF with a gray vinyl finish.
Recommended Hookup: The
subwoofer can be connected several different ways, utilizing the speaker level
inputs and outputs, or the Line or LFE input. The subwoofer features spring clip
terminals for the speaker level inputs and outputs, plus a stereo RCA line input
and a mono LFE input. The recommended hookup methods are as follows:
- Recommended Hookup A: Polk
Audio recommends connecting the amplifier's left and right front channels to
the speaker level inputs of the subwoofer and the front left and right
satellite speakers to the subwoofer's speaker level output. The center and
surround speakers are directly connected to the amplifier. The amplifier's
bass management/speaker setup should be configured with the front left and
right speakers set to "Large" and the Subwoofer set to "Off" or "None".
- Recommended Hookup B: An
alternate hookup method is for the subwoofer and front speakers to be
connected in parallel directly to the amplifier's front outputs. The center
and surround speakers are directly connected to the amplifier. The bass
management setup is the same as Recommended Hookup A.
- Line Inputs: If you choose
to connect the subwoofer using the RCA line inputs, you have two choices:
- LFE: This mono RCA
input allows you to connect the subwoofer to the LFE (low-frequency
effects) channel in a 5.1-channel surround system. This input is
unfiltered, meaning it bypasses the subwoofer's built-in low pass
filter. The upper end of the subwoofer's frequency range is determined
by the receiver's low-pass filter.
- Stereo Line Level:
This stereo RCA input allows you to connect to an unfiltered subwoofer
output on a receiver. The subwoofer's built-in low pass filter is used
to fine tune the subwoofer to the rest of the speaker system. You will
need a "Y" adapter to connect a mono subwoofer cable to the stereo line
- Note: Connecting a
"filtered" subwoofer signal to the line level input, causing the
signal to also be affected by the subwoofer's low-pass filter, will
likely cause irregularities in the frequency response.
Low-Pass Filter: The subwoofer
has a built-in low pass filter which cuts the top end of the sub's frequency
range. The "Frequency" rotary control on the back panel lets you adjust the
cutoff frequency. When adjusted toward the "higher" end, the bass will have more
warmth, and when adjusted toward the "lower" end, the bass will sound thinner
Note: The frequency
range of the low-pass filter's adjustment is not indicated.
Phase Switch: Speaker
positioning can sometimes cause subwoofers to work against satellite speakers
instead of with them, creating frequency canceling and a dramatic loss of bass.
When this occurs, you can switch the "phase" of the subwoofer driver from Normal
(0°) to Reverse (180°), to enhance the bass "attack".
Volume: The subwoofer has a
separate volume level, allowing you to adjust the subwoofer relative to the
remainder of the sound system.
Slot-loaded Bass Vent: The
powered subwoofer features a slot-loaded bass vent on the side panel just beside
the woofer. The slot, 12-1/16" x 1", dramatically lessens turbulence, noise and
distortion, enabling the subwoofer to play precise, thunderous bass.
Subwoofer Positioning: The
RM6900 subwoofer is not magnetically shielded and may cause picture interference
if it is placed in close proximity to a TV or computer monitor. For best
performance, the subwoofer should be placed at least six inches away from a