Polk Audio Speaker System RM7500 User Manual

RM7500  
Instruction  
Manual  
5601 METRO DRIVE,  
BALTIMORE, MARYLAND 21215, USA,  
410-358-3600, FAX: 410-764-5266  
RM7509-1  
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SURROUND SPEAKERS  
SPEAKER PLACEMENT (Figure 1)  
The best placement for surround channel  
speakers is on the side walls, facing each  
other, a foot or two behind your listening  
position. If this placement is not possible,  
the speakers may be placed on a rear wall.  
In either case, mount the speakers two to  
four feet above your head (when seated).  
CENTER CHANNEL SPEAKER  
Place the center channel speaker as close  
to your TV as possible. The most popular  
placement for center channel speaker is  
right on top of your TV set. The unique slen-  
der design of the RM7500 center channel  
speaker makes it easy to mount on the wall  
directly above your TV, especially if you  
have a slim line or flat screen.  
Note: To avoid marring the finish of your  
television, A/V furniture or speakers, use  
the “bump-ons” (adhesive rubber feet)  
that are packaged with this manual.  
FRONT SATELLITES  
The front satellite and center channel speak-  
ers of the RM7500 system are specifically  
designed to complement flat screen and inset  
display televisions by mounting unobtrusively  
on the wall flanking the TV. The innovative  
design and integrated brackets of the  
RM7500 satellites makes them easy to  
mount. They also sound great on stands,  
bookshelves, or in entertainment centers.  
It’s a good idea to place the front satellites  
about as far apart as the distance you are  
sitting from them. Avoid placing them less  
than two feet from the side walls of the  
room. When mounting the speakers on  
stands or on a shelf, place them at or near  
your ear level.  
FIGURE 1  
SUBWOOFER  
CENTER CHANNEL  
LEFT  
RIGHT  
CHANNEL  
CHANNEL  
Y
X
X=Y=Z  
Z
REAR SPEAKERS  
REAR SPEAKERS  
3
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POWERED SUBWOOFER  
WALL-MOUNTING THE SATELLITES  
CONNECTING THE SPEAKERS  
TO YOUR SYSTEM  
the black (-) terminal on your speaker. Most  
wire has some indication (such as color  
code, ribbing, or writing) on one of the two  
conductors to help maintain consistency.  
The RM7500 System uses a specially  
finished Polk Audio PSW650 Powered  
Subwoofer to round out its surround sound  
capabilities. This subwoofer module may be  
placed behind furniture or next to a sofa or  
chair. It can be placed anywhere in the room,  
but you will get the best performance from  
it when it is on the same side of the room  
as the front satellites. Placing it near a wall  
(good) or in a corner (better) enhances its  
delivery of lower frequencies. Allow at least  
6 inches (15cm) of space between any  
subwoofer driver and any wall or obstruc-  
tion. (Figure 2)  
All five satellites of the RM7500 system have  
integrated wall-mounting brackets built onto  
the rear of each speaker. On-wall installation  
of the RM speakers requires basic skills and  
basic tools (drill and screwdriver). If you are  
in doubt that you possess the necessary  
skills or tools, consult your Polk dealer or a  
professional installer. Otherwise, follow the  
steps below to safely secure the speakers  
to the location of your choice.  
GENERAL  
• Use two-conductor 16-gauge (or thicker)  
audiophile grade speaker wires.  
• If your speakers sound “thin,” with  
little bass and little or no center image,  
chances are that one of the speakers  
wires is connected backwards. Double-  
check all connections.  
• Measure enough wire to reach from your  
receiver or amplifier to each speaker plus  
an additional 12" to allow moving the speak-  
ers or receiver without having to disconnect  
the wires.  
To connect wire to the binding post, unscrew  
the plastic hex nut on the binding post and  
insert the bare wire into the hole near the  
base of the binding post. Do not insert the  
insulated part of the wire into the hole; this  
will not give you a good connection. Twist the  
hex nut back down the binding post until it  
firmly meets the wire. Do not over-tighten.  
(Figure 4)  
• One of the terminals on the rear of the  
speaker is marked red (+) and the other  
black (-). Make certain that you connect  
the wire from the red (+) terminal of your  
receiver or amplifier to the red (+) terminal  
on your speaker, and the wire from the black  
(-) terminal of your receiver or amplifier to  
• Make sure the locations you have selected  
for wall-mounting do not conceal electrical  
wiring or plumbing.  
• Hold the speaker in the chosen location to  
make certain it clears the ceiling, adjacent  
walls, corners, beams, lighting fixtures and  
door/window frames.  
Set the subwoofer on its feet. (Figure 3)  
NEVER LAY THE SUBWOOFER ON THE  
AMPLIFIER END–THIS WILL DAMAGE  
THE AMPLIFIER.  
• If you are certain that there is a stud  
behind the wall surface, drive a #10 screw  
(not supplied) through the wall and into the  
stud leaving the screw head protruding 1/8".  
This subwoofer is not magnetically shielded  
and should not be placed close to a television  
set. If you see any color distortion on your  
TV, move the subwoofer away from the set.  
• If there is no stud behind the chosen loca-  
tion, install a #10 wall anchor (not supplied)  
into the wall by following the wall anchor  
manufacturer’s directions, leaving the screw  
head protruding 1/8".  
• Line up the speaker so that the screw  
head passes through the large center  
hole of the bracket’s keyhole slot. Let the  
speaker slide straight down, allowing the  
screw head to slip behind the smaller end  
of the keyhole slot.  
FIGURE 4  
FIGURE 3  
FIGURE 2  
OK  
Driver Side  
6 inches (15cm)  
From wall  
LOOSEN HEX NUT  
INSERT SPEAKER WIRE  
THROUGH HOLE  
TIGHTEN HEX NUT  
DO NOT INSERT  
INSULATED SECTION  
OF SPEAKER WIRE  
4
5
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HOOK-UP OPTIONS  
The option that is best for you depends on  
your electronics and your personal taste.  
The hook-up option you choose may have  
a subtle effect on the overall sound of your  
system. You may want to experiment with  
options to see what works best for you.  
Remember, there is no “one best method,”  
although we do recommend options 1  
(easiest) and 4a or 4b (best sounding).  
The versatile RM7500 loudspeaker system  
gives you many hook-up options. Each option  
has advantages and potential downsides.  
Option #  
Equipment  
Sat/Sub Setting In  
“Speaker Setup” Or  
“Bass Management”  
(Dolby® Digital Only)  
PSW Input &  
PSW Output  
Use LFE Output  
Or Subwoofer Out?  
Hi-Pass Crossover  
Phase  
Low-Pass  
Remarks  
Speaker Level  
Setting  
Position  
See Page 13  
See Page 13  
See Page 12  
R E C O M M E N D E D  
S E T T I N G S  
1 – Receiver or  
Processor with  
Subwoofer “Out”  
(Figure 5)  
Front: “Large”  
Sub: “On”  
Input: Line Level from  
YES  
NO  
N/A  
Normal  
This is the most convenient option.  
But be sure to use correct input  
(filtered or unfiltered, see page 8)  
for your receiver.  
Unfiltered “Sub Out” Or:  
“LFE/Subwoofer In” from  
Filtered “Sub Out” (see page 8)  
Output: None  
2a – Pro Logic®,  
Dolby Digital or  
Stereo  
Front: “Large”  
Sub: “Off”  
Input: Speaker Level  
Full Range  
Normal  
Easy to set up. Eliminates  
most hum & noise, offering  
excellent performance. In most  
systems, this is the preferred  
hook-up option.  
Output: Speaker Level to Sats  
(Figure 6)  
2b – ProLogic,  
Dolby Digital or  
Stereo  
Front: “Large”  
Sub: “On”  
Input: Speaker Level (L & R)  
+ LFE Line Level  
YES  
NO  
Full Range  
N/A  
Normal  
Normal  
Similar to 2a, may offer  
improved bass performance,  
satisfies “The LFE Urge.”  
(Figure 6)  
Output: Speaker Level to Sats  
3a – Equipment with  
Pre-Amp Out Options  
(Figure 7)  
Front: “Large”  
Sub: “Off”  
Input: Line Level  
from Pre-Outs  
Clean signal with potentially  
lower distortion at high  
volume level. But on some  
systems, “line level” may  
lack adequate gain.  
Output: None (Sats Direct  
from Receiver or Amp)  
3b – Pre-Out Options  
For L, R and LFE  
(Figure 7)  
Front: “Large”  
Sub: “On”  
Input: Line Level  
YES  
NO  
YES  
N/A  
N/A  
N/A  
Normal  
Normal  
Normal  
Similar to 3a, may offer  
improved bass performance,  
satisfies “The LFE Urge.”  
from Pre-Outs + LFE Line Level  
Output: None (Sats Direct  
from Receiver or Amp)  
4a – Equipment with  
Pre-Out & Power Amp  
“In” Jacks  
Front: “Large”  
Sub: “Off”  
Input: Line Level  
from Pre-Outs  
May provide improved  
midrange clarity and will  
allow the sats to play at  
higher volume before  
(Figure 8)  
Output: Line Level  
Out to Amp  
distortion becomes evident  
4b – Equipment with  
Pre-Out & Power Amp  
“In” Jacks  
Front: “Large”  
Sub: “On”  
Input: Line Level  
from Pre-Outs + LFE Line Level  
Similar to 4a, may offer  
improved bass performance,  
satisfies “The LFE Urge.”  
(Figure 8)  
Output: Line Level  
Out to Amp  
6
7
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In Dolby® Pro Logic® systems the subwoofer  
output jack will always be “ON.” Connect the  
subwoofer output jack to the “LFE/Subwoofer”  
input of the subwoofer. Disconnect the other  
speakers in the system so that all you can  
hear is the subwoofer. Play music or a movie  
with vocal content. If you can hear and  
understand the words, your output jack is  
not filtered, in which case you want to use  
one of the (line level) “in” jacks on the sub-  
woofer itself. If all you can hear is bass,  
and the vocals are not at all or barely  
audible, then your subwoofer input jack is  
filtered and you should use the subwoofer’s  
“LFE/Subwoofer In.”  
YOUR SUBWOOFER OUTPUT:  
FILTERED OR UNFILTERED?  
Use the “speaker set-up” or “bass manage-  
ment” function of your Dolby Digital proces-  
sor to select subwoofer as “on” or “yes.”  
EASIEST HOOK UP OPTION  
FIGURE 5 (Refers to Hook Up Option #1 on Chart, Pages 6-7)  
FIGURE 6 (Refers to Hook Up Option #2 on Chart, Pages 6-7)  
2
Alternate Hook-Up Option*  
* To determine proper input jack for your system, see  
Your Subwoofer Output: Filtered Or Unfiltered?(above).  
8
9
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AC POWER  
The power switch has three positions: “On,”  
“Off,” and “Auto” (Figure 9, page 13). In  
the “Auto” position, the amplifier will auto-  
matically turn on, and the green pilot light  
on the front of the subwoofer will illuminate  
as soon as the speaker senses a signal com-  
ing from your electronics. The amplifier and  
the green pilot light will turn off approxi-  
mately 15 minutes after input signal ceases.  
In the “On” position, the power amplifier will  
operate and the green pilot light will illumi-  
nate until the switch is set to “Off” position  
or the AC cord is disconnected from a  
power source.  
We recommend using the “Auto” position.  
Turn it to “off” if the system will not be  
used for extended periods of time, such  
as during vacations.  
The subwoofer has a built-in power amplifier  
and must be plugged into a standard house-  
hold 110-120V AC power source in order  
to operate.  
FIGURE 7 (Refers to Hook Up Option #3 on Chart, Pages 6-7)  
FIGURE 8 (Refers to Hook Up Option #4 on Chart, Pages 6-7)  
4b  
3
10  
11  
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ADJUSTING THE POWERED  
SUBWOOFER  
VARIABLE LOW PASS CROSSOVER (Figure 9)  
SUBWOOFER LEVEL CONTROL (Figure 9a)  
+3dB BASS BOOST (Figure 9)  
This control adjusts the frequency range over  
which the subwoofer operates. It only affects  
signals that are sent through the line level,  
subwoofer and speaker level inputs. It has  
no effect on signals fed into the LFE input.  
Subwoofer level is adjusted via the knob  
on the front of the subwoofer under the logo  
pod. Play a piece of music that has an aver-  
age amount of bass content. Start with the  
knob set to “5” and the Phase switch set to  
“normal.” Adjust by ear using a wide variety  
of CDs and video sources. Adjust for deep,  
powerful bass without “boominess.”  
In most cases, this switch should be set to  
“0.” If you have hooked up your subwoofer  
from a subwoofer output or pre-out jacks  
and cannot get enough bass output even  
with the subwoofer level control turned  
all the way up, switch to the +3dB position.  
In typical systems where the 3dB boost is  
not needed, this switch can be useful for  
providing a quick boost for bass-shy program  
material. Most people prefer more bass out-  
put for movies than music so you can use  
this switch as a handy way to adjust bass  
levels as you switch between movie  
The specially finished PSW650 Powered  
Subwoofer included in your RM7500 System  
features two 10-inch direct radiating  
drivers, 250-watt power amplifier, and  
dual Power Port bass ports. It offers a  
wide range of setting options. To perfectly  
optimize this subwoofer we recommend  
the following settings as starting points,  
but the option that is best for you depends  
on your electronics, main speakers and per-  
sonal taste. After you have become familiar  
with what the settings do, experiment with  
alternate options to find the method that  
works best for your system.  
RECOMMENDED CROSSOVER SETTINGS —  
ON WALL & OFF WALL  
Mounting your right and left front satellites  
on the wall tends to increase their bass.  
Mounting them on stands away from the  
sides of the room tends to decrease their  
bass. If you mount the satellites on the  
wall, we recommend setting your variable  
crossover control at a lower setting.  
(Figure 10) If you mount the satellites on  
stands, we recommend setting your variable  
crossover control at a higher setting.  
(Figure 11)  
SWITCHABLE PHASE ALIGNMENT (Figure 9)  
Changing the phase of your subwoofer can  
affect its bass “attack.” If the bass sounds  
muddy or unclear, try toggling the phase  
control. Have someone else switch between  
the two settings while you sit in your favorite  
listening position. Use music with good bass  
(preferably “plucked” string bass) and a deep  
male vocal. When you hear the best balance  
of deep bass and natural lower octaves of  
the male voice, you have achieved optimum  
phase tuning.  
to music sources.  
HIGH PASS CROSSOVER—  
SPEAKER LEVEL (Figure 9)  
SUBWOOFER SETTINGS (Figure 9)  
Most systems will sound best with the toggle  
set to “Full Range.” The “80 Hz” setting is  
recommended only if you frequently play  
your system at extremely high levels and  
prefer hook-up options 2 (a & b). Adjust  
variable low pass upward if you make use  
of this feature.  
On the back of the subwoofer, you will see  
the following controls:  
FIGURE 10  
FIGURE 11  
Variable Low Pass Crossover Control  
+3dB Switchable Bass Boost Switch  
(to boost output of low output subwoofer  
output jacks)  
Generally, turning the knob “up” (clockwise)  
will add more “warmth” to the bass and  
lower midrange, possibly at the sacrifice  
of bass “tightness” and midrange clarity.  
Conversely, turning the knob “down” (counter  
clockwise) will make the bass and lower  
midrange sound “thinner.”  
High Pass Crossover Toggle  
FIGURE 9  
The “80 Hz” setting provides extra bass  
filtering for front satellites. The “Full Range”  
setting provides best performance in most  
cases.  
Switchable Phase Alignment Toggle  
• The Subwoofer Volume Control  
is found under the logo pod on the  
front of the subwoofer.  
FIGURE 9a  
These controls allow you to optimize perfor-  
mance of the powered subwoofer to match  
your audio system, room acoustics, and  
program material.  
5
12  
13  
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Q. “WHY DOES MY SYSTEM HUM?"  
A. BECAUSE IT DOESN'T KNOW THE WORDS.  
This is what passes for humor in the  
audio business.  
SAFE LIMITS OF OPERATION  
MAINTAINING THE APPEARANCE  
OF RM SERIES SPEAKERS  
Your Polk Audio loudspeakers are made with  
the highest-quality materials, insuring years  
of great sounding, trouble-free performance.  
However, damage to loudspeakers can occur  
when an amplifier, regardless of its wattage,  
is made to play at higher listening levels that  
its power can clearly produce. (This is usual-  
ly beyond the “1 to 2 o’clock” position on the  
volume control.) This results in very high  
levels of audible distortion originating in the  
amplifier, which adds a harsh, gritty sound  
to the music you're listening to.  
Your new speaker cabinet is made of a  
rugged material that can be dusted or  
cleaned with a moist cloth. Avoid harsh  
detergents and cleaning fluids; they can  
permanently damage the finish of your  
speakers. Gently vacuum the grilles to  
remove dust.  
Here’s the real answer:  
If you have any electrical (60Hz) hum in your  
system, you're going to hear it clearly as  
soon as you hook up your subwoofer. Most  
hum problems are caused by “ground loops.”  
That is, the electrical grounds of the compo-  
nents in your system are not at the same  
electrical potential. A very common ground  
loop source is cable TV. Disconnect the coaxi-  
al cable from your TV and/or VCR. If the hum  
goes away, the cable is the ground loop vil-  
lain. In that case you need a 75 ohm ground  
loop isolator. This device is about the size of  
a pen and is attached to your coaxial cable  
where it plugs into your VCR (or television).  
You can obtain this device from some audio  
dealers, Radio Shack stores, Zantech (1-800-  
843-5465) or Channel Plus (1-800-999-5225).  
TECHNICAL ASSISTANCE OR SERVICE  
If, after following these hook up directions,  
you experience difficulty, please double-  
check all wire connections. Should you  
isolate the problem to the speaker, contact  
the authorized Polk Audio dealer where you  
made your purchase, or call Polk Audio’s  
friendly Customer Service Department at  
1-800-377-7655 (calls from US or CAN only)  
from 9am to 6pm Eastern Standard Time,  
Monday through Friday. You may also contact  
us via email: [email protected].  
Contrary to popular belief, a speaker is more  
likely to be damaged by trying to get too  
much volume from a low-powered amp or  
receiver (than from a high-powered one).  
Ground loops and hum can also be the result  
of faulty electrical wiring in your home.  
Consult a licensed electrician to evaluate  
and, if necessary, repair the AC wiring in  
your home. Light dimmers also tend to intro-  
duce noise into audio systems. Remove them.  
If none of our suggestions work for you, call  
our customer service number.  
14  
15  
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SPECIFICATIONS  
POLK AUDIO LIMITED WARRANTY  
RM7500  
System  
Warranty for Satellites and  
Center Channel Loudspeakers  
Polk Audio, Inc. warrants to the original pur-  
chaser only that this Polk Audio Loudspeaker  
ship at any time during this Warranty period,  
RM75C  
Center Channel  
(Magnetically Shielded)  
PSW650  
Subwoofer  
Polk Audio or the Polk Audio Authorized Dealer  
will, at its option, repair or replace this Product  
at no additional charge, except as set forth  
Overall Frequency Response:  
25Hz - 25kHz  
Driver Complement:  
Driver Complement:  
2 - 10"(25cm) Woofers  
-3dB Limits:  
Product (the “Product”) will be free from defects below. All replaced parts and Products become  
Mid-Bass: 2 - 5 1/4" (13.3cm) Polypropylene  
Composite with Rubber Surround,  
Tweeter: 1 - 1" (25mm) Dome,  
28Hz - 23kHz  
Continuous Average Power*  
in materials and workmanship for a period of  
five (5) years from the date of original retail  
purchase from a Polk Audio Authorized Dealer.  
However, this Warranty will automatically  
terminate prior to the expiration of the five (5)  
years if the original retail purchaser sells or  
otherwise transfers the Product to any other  
party. The original retail purchaser shall here-  
inafter be referred to as “you.”  
the property of Polk Audio. Products replaced or  
repaired under this warranty will be returned to  
you, within a reasonable time, freight prepaid.  
165 watts into 4 Ohms @ 1% THD over  
power bandwidth of 30 - 120Hz  
Nominal Impedance:  
Overall Frequency Response:  
Compatible with 8 Ohm Outputs  
Dynamic Power Rating*  
60Hz - 25kHz  
250 watts into 4 Ohms  
Satellite-Center to Sub Crossover:  
This warranty does not include service or parts  
to repair damage caused by accident, disaster,  
misuse, abuse, negligence, inadequate packing  
or shipping procedures, commercial use, voltage  
inputs in excess of the rated maximum of the  
unit, cosmetic appearance of cabinetry not  
directly attributable to defect in materials or  
workmanship, or service, repair, or modification  
of the Product which has not been authorized  
or approved by Polk Audio. This warranty shall  
terminate if the Serial number on the Product  
has been removed, tampered with or defaced.  
-3dB limits:  
Variable (80-100 Hz Recommended)  
90Hz - 23kHz  
System Acoustic Efficiency  
89 dB at 1 meter  
Shipping Weight (box 1):  
Sensitivity:  
57 lbs • 25.9 kgs  
91dB SPL @ 1m,  
2.83 Vrms Drive Level  
Calculated Maximum Output (in-room)  
114dB at 1 meter  
Shipping Weight (box 2):  
61 lbs • 27.7 kgs  
Crossover Topology:  
Enclosure Type:  
Mid-Bass Driver:  
Direct Radiating, Vented  
1st Order High-Pass @ 80Hz  
2nd Order Low-Pass filters Cascaded,  
-6dB re Midband Level @ 1.8 and 2.8kHz  
Tweeter:  
Warranty for PSW650 Subwoofer  
RM75S  
Front & Rear Satellites  
(Magnetically Shielded)  
Port Type:  
Polk Audio, Inc., warrants to the original pur-  
chaser only that the amplifier in this Polk Audio  
Loud-speaker Product (the “Product”) will be  
free from defects in material and workmanship  
for a period of three (3) years from the date  
of original retail purchase from a Polk Audio  
Authorized Dealer. Polk Audio, Inc., further  
warrants to the original purchaser only that  
the Loudspeaker(s) in this Polk Audio Product  
(the “Product”) will be free from defects in  
material and workmanship for a period of five  
(5) years from the date of original retail pur-  
chase from a Polk Audio Authorized Dealer.  
The original retail purchaser shall hereinafter  
be referred to as “you.” However, this Warranty  
will automatically terminate prior to the expira-  
tion if you sell or otherwise transfer the Product  
to any other party.  
Dual, Power Port, Rear Firing  
2nd Order High-Pass  
(Mylar Film Capacitors in Signal Path)  
Mid-Bass-to-Tweeter Acoustic Crossover  
@ 2.3kHz  
Overall Frequency Response:  
Driver Complement:  
25Hz - 180Hz  
Mid-Bass: 1 - 5 1/4" (13.3cm) Polypropylene  
Composite with Rubber Surround,  
Tweeter: 1 - 1" (25mm) Dome,  
-3dB Limits:  
Impedance:  
28Hz - 125Hz  
Compatible with 8 Ohm Outputs  
Overall Frequency Response:  
This warranty is in lieu of all other expressed  
Warranties. If this Product is defective in mate-  
rials or workmanship as warranted above, your  
sole remedy shall be repair or replacement as  
provided above. In no event will Polk Audio, Inc.  
be liable to you for any incidental or consequen-  
tial damages arising out of the use or inability  
to use the Product, even if Polk Audio, Inc. or a  
Polk Audio Authorized Dealer has been advised  
of the possibility of such damages, or for any  
claim by any other party. Some states do not  
allow the exclusion or limitation of consequen-  
tial damages, so the above limitation and exclu-  
sion may not apply to you.  
Variable Low-Pass:  
60Hz-25kHz  
Enclosure Type:  
40 - 120Hz, 4th Order  
Vented, Dual Power Port  
-3dB limits:  
Fixed High-Pass:  
90Hz-23kHz  
Wall Mounting:  
Line Level: 80Hz, 2nd Order  
Power PortBrackets  
on rear of Enclosure  
Speaker Level: 80Hz, 1st Order  
Sensitivity:  
89dB SPL @ 1m,  
2.83 Vrms Drive Level  
Bass Boost:  
Recommended Amplifier Power:  
0 or +3dB  
20 - 150 Watts/Channel  
Crossover Topology:  
Phase Control:  
Mid-Bass Driver:  
Dimensions:  
Switch Normal and Reverse (0º or 180º)  
1st Order High-Pass @ 80Hz  
2nd Order Low-Pass Filters  
Tweeter:  
6 1/4"H x 21 1/2"W x 5 1/2"D  
15.9cmH x 54.6cmW x 14.0cmD  
Inputs:  
2nd Order High-Pass  
Speaker and Line Level (Filtered)  
LFE Line (Unfiltered)  
Shipping Weight (each):  
(Mylar Film Capacitors in Signal Path)  
Mid-Bass-to-Tweeter Acoustic Crossover  
@ 2.5kHz  
17 lbs • 7.7 kgs  
Outputs:  
Speaker Level, Pass-Through or 80Hz High-  
Pass Filtered (Switchable)  
Line Level, High-Pass Filtered at 80Hz  
Impedance:  
* About Power Ratings  
Compatible with 8 Ohm Outputs  
To allow Polk Audio to offer the best possible  
warranty service, please fill out the Product  
Registration Card(s) and send it to the Factory,  
at the address provided on the Product Cards(s)  
within ten (10) days of the date of purchase.  
When making comparisons between product  
specifications it helps to understand what they  
mean, particularly with amplifier power ratings.  
The Federal Trade Commission has recently issued  
new regulations regarding the power ratings of all  
amplifiers including self-powered speakers. Polk  
Audio supports this effort to standardize power  
testing methods in order to provide consumers with  
a “level playing field” basis for comparison. Make  
sure the basis for the power rating is clearly stated  
before comparing it to another product’s specification.  
Enclosure Type:  
Dimensions:  
All implied warranties on this Product are  
limited to the duration of this expressed  
Warranty. Some states do not allow limitation  
on how long an implied Warranty lasts, so the  
above limitations may not apply to you. This  
Warranty gives you specific legal rights, and  
you also may have other rights which vary  
from state to state.  
Vented, Power Port  
18 3/4"H x 17 1/2"W x 18 3/4"D  
47.6cmH x 44.5cmW x 45.7cmD  
Wall Mounting:  
Power Port Bracket  
on rear of Enclosure  
Shipping Weight (each):  
61 lbs • 27.7 kgs  
Defective Products must be shipped, together  
with proof of purchase, prepaid insured to  
the Polk Audio Authorized Dealer from whom  
you purchased the Product, or to the Factory  
at 2550 Britannia Boulevard, Suite D,  
San Diego, California 92173. Products must  
be shipped in the original shipping container  
or its equivalent; in any case the risk of loss  
or damage in transit is to be borne by you.  
If upon examination at the Factory or Polk  
Audio Authorized Dealer it is determined that  
the unit was defective in materials or workman  
Recommended Amplifier Power:  
20-150 Watts/Channel  
The FTC rating is based on the continuous power output of the amplifier. However, music and movies are not  
continuous but are mainly composed of short bursts of sound. For this reason we also supply a “Dynamic Power”  
rating which measures the ability of the amplifier to produce power in short bursts similar to those found in music  
and movies. In our experience an amplifier with higher Dynamic Power output will play louder under most condi-  
tions regardless of the continuous power rating. Dynamic Power is typically greater than continuous average  
power although it is not uncommon for two amplifiers with identical FTC “Continuous Average” ratings to have  
very different Dynamic Power performance.  
Dimensions:  
11 1/2"H x 9 1/2"W x 5 1/2"D  
29.2cmH x 24.1cmW x 14.0cmD  
This Warranty applies only to Products pur-  
chased in the United States of America, its  
possessions, and U.S. and NATO armed forces  
exchanges and audio clubs. The Warranty terms  
and conditions applicable to Products purchased  
in other countries are available from the Polk  
Audio Authorized Distributors in such countries.  
Shipping Weight (pair):  
20 lbs • 9.1 kgs  
However, loudspeaker efficiency is by far the most important factor in determining how loud your system will  
play. Loudspeaker efficiency is usually given as the amount of sound produced by 1 watt at a distance of 1 meter.  
A medium efficiency loudspeaker rating would be around 87 dB from 1 watt at 1 meter. A highly efficient loud-  
speaker might be 90 dB. Each 3dB increase in efficiency doubles the sound output for a given power input. So  
a 100 watt, 90 dB self-powered speaker and a 200 watt 87 dB unit would produce the same sound output. For  
this reason we also specify the loudspeaker efficiency and calculated maximum sound output.  
Polk Audio and the Consumer Electronics Manufacturer‘s Association are currently engaged in an effort to set  
standards for specifying the actual acoustic output of self-powered speakers. If we are successful, consumers  
will be able to use these ratings to make more meaningful product comparisons and better purchasing decisions  
in the future.  
“Polk Audio” and “The Speaker Specialists are trademarks of Britannia Investment Corporation  
used under license by Polk Audio Incorporated.  
Dolby, Pro Logic, and AC-3 are registered trademarks of Dolby Laboratories Licensing Corporation.  
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Note: Specifications are subject to change without notice.  
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