Bridged – Polk Audio PA200.4 User Manual

Page 8

W W W . P O L K A U D I O . C O M / A M P S

P A

1 2 V

A M P L I F I E R S

ENGLISH

C H 1

C H 2

S U B W O O F E R

S U B +

C H 3

C H 4

S U B -

Bridged

Subwoofer Operation (top view)

FIGURE 4—SPEAKER WIRING DIAGRAMS (PA1100.5)

CROSSOVER SETTINGS
AND GAIN ADJUSTMENT

Your Polk Audio power amplifier needs to be adjusted
carefully to achieve maximum performance. These are
some guidelines to follow when fine-tuning the amplifier.

• For full-range and simultaneous stereo/mono bass

applications, the crossover selection switch should
be set to FULL. If the amplifier is driving your sub-
woofers, set the switch to LOW, and for mid-bass/
midrange output, set to HIGH.

• The crossover frequency control needs to be adjusted

to suit your particular system. For subwoofer appli-
cations, try and keep the setting low enough to prevent
image smearing (you should not be able to hear male
voices from the subwoofer) but not so low as to create
a gap between the subwoofer and the mid-bass/
midrange speakers. For mid-bass/midrange settings,
try to keep the setting low enough to keep your sound
stage in front of you, without overdriving the speaker.
It will be to your advantage to spend some extra time
with this adjustment, listening to familiar music or
system set-up discs to achieve the kind of musical
reproduction that you prefer.

• The gain adjustment allows you to set proper signal match

for clean, quiet amplifier operation. For full-range and
simultaneous stereo/mono bass applications, start
by playing some music you are familiar with. With the
gain adjustment on the amplifier in the middle of its
rotation, bring up the volume on your head unit to the
3/4 volume setting or until you start to hear distortion
or clipping. If you hear distortion before you reach the
3/4 volume setting of your head unit, reduce the gain
setting on the amplifier and start to raise the head unit
volume again. When you can listen to the music at or
slightly above 3/4 on your head unit without audible
distortion, slowly raise the gain of the amplifier until
distortion is heard, then back off the gain until the
distortion is not audible. This setting will allow you
to reach full output with all but the quietest of source
material, while avoiding excessive noise in the system.

NOTE: Polk amplifiers use a digital gain control with
a finite number of adjustment steps. A very small adjust-
ment may not cause any audible change in level.

Front/Rear Operation (top view)

Front/Rear Bridged Operation (top view)

FIGURE 4—SPEAKER WIRING DIAGRAMS (PA1100.5)

C H 1 F R O N T

C H 2 F R O N T

C H 3 R E A R

C H 4 R E A R

C H 1

C H 2

F R O N T

C H 3

C H 4

R E A R

Bridged

Channel 1

Channel 2

Channel 4

Channel 3

Channel 1 Front

Channel 2 Front

Channel 4 Rear

Channel 3 Rear

Channel 1

Channel 2

Channel 4

Channel 3

Front

Rear

Subwoofer