Figure 1.
Conventional Speakers
L IAC
L IAC
L
L
L Dim
R Dim
R
IAC
Stereo Signal
Stereo Signal
IAC
Dimensional Signal
Cancelation
R
R IAC
R IAC
Figure 3.
Polk TRUE STEREO SDA
Figure 2.
Compressed Sound Stage due to
Undesired Signals
Figure 4.
Accurate Reproduction of the Full
Sound Stage by the SDA Loundspeakers
Stereo
SDA
True Stereo
1. 2
Expect Great Sound – The Legend Legacy
Thank you for choosing the Polk Legend Series of
loudspeakers. With sound that virtually transports the listener
to the scene of the recorded performance, the Legend Series
offers great Polk sound housed in bold, American design. Listen
to music with crisp, lifelike detail and natural reproduction of
complex low-frequency instruments — even during extended
listening at performance levels. Dive into your music collection
and bring the live show home, or amplify your home theater
entertainment. With its American modern styling, each speaker
in the Legend Series features gorgeous curves and aggressive
accents that elevate the décor of your room. Pure and simple,
the Polk Legend Series is engineered and designed with your
entertainment in mind.
Having built a reputation as the makers of great sound for
more than 40 years, Polk Audio takes pride in superior sound
and build quality, which features many patented and
award-winning audio innovations. For Polk, building audio
products isn’t just a job — it’s a passion to deliver great sound
that’s accessible for everyone!
Contents
Expect Great Sound — The Legend Legacy
.................................... 2
Patented SDA Pro Surround Technology
.......................................... 2
Safety Instructions
........................................................................................ 3
What’s in the Box
........................................................................................... 5
How to Connect Your System
.................................................................. 5
Legend Series Speaker Positioning
...................................................... 6
System Diagnostics
....................................................................................... 8
Caring for Your Legend Loudspeakers
............................................... 8
Specifications
................................................................................................... 8
Warranty
............................................................................................................. 9
Patented SDA Pro Surround Technology
Polk Patented SDA Pro (Stereo Dimensional Array) surround
technology creates an expansive soundstage and detailed
stereo image, while delivering a natural multi-dimensional
sound experience. A wide, detailed soundstage is accomplished
by revealing the original recorded signal. By positioning
additional drivers to deliver a precisely derived interaural
crosstalk cancellation signal to your ears, SDA Pro enables
you to hear the sonic image just as the recording captured
it. Individual instruments appear across a wide stage, as if
the performance were in front of you at that very moment. In
addition to processing two channel audio, it also integrates
with 5.1 surround sound and is compatible with modern
decoding technologies.
HOW SDA PRO
(STEREO DIMENSIONAL ARRAY) WORKS
The original recorded left and right stereo signals are intended
for the left and right ears, respectively. With conventional
stereo speakers, sound from the left and right channel cross
paths and are heard by the opposite ear
(Figure 1)
. This is
called Interaural Crosstalk (IAC). IAC distorts the imaging
process, causing a narrow, shallow sound field
(Figure 2)
. SDA
Pro technology employs an acoustically inverted “dimensional”
signal to cancel IAC, without impacting the original recorded
signal
(Figure 3)
. The result is that only the correct, original
recorded signal reaches each ear, and the full width and depth
of the sound stage is accurately reproduced
(Figure 4)
.
