Polk Audio PA400.1 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

SPECIFICATIONS

PA400.1

PA600.1

PA1200.1

Dynamic Power Rating
@ 1 Ohm

800W x 1

1200W x 1

2400W x 1

RMS Continuous Power
@ 1 Ohm

400W x 1

600W x 1

1200W x 1

RMS Continuous Power
@ 2 Ohms

300W x 1

400W x 1

800W x 1

Frequency Response

20-250Hz

Damping Factor

150

Variable Low Pass
Crossover 12dB slope

30-250Hz

Subsonic Filter

Yes

Bass Boost

Yes

Input Impedance

20K

Input Sensitivity

150mV/7.5V

Output Load

1 ohm

Fusing

2 x 25A

2 x 30A

3 x 40A

Illuminated LED Driver

Yes

External Fan Driver

Yes

Pass Through RCA Jacks

Yes

PA400.1

Power Output: 200 Watts RMS x 1 at 4 Ohms and

≤ 1% THD+N

Signal to Noise Ratio: -60 dBA (reference 1 Watt into 4 Ohms)
Additional Power: 400 Watts RMS x 1 at 1 Ohm and

≤ 1% THD+N

PA600.1

Power Output: 300 Watts RMS x 1 at 4 Ohms and

≤ 1% THD+N

Signal to Noise Ratio: -60 dBA (reference 1 Watt into 4 Ohms)
Additional Power: 600 Watts RMS x 1 at 1 Ohm and

≤ 1% THD+N

PA1200.1

Power Output: 400 Watts RMS x 1 at 4 Ohms and

≤ 1% THD+N

Signal to Noise Ratio: -60 dBA (reference 1 Watt into 4 Ohms)
Additional Power: 1200 Watts RMS x 1 at 1 Ohm and

≤ 1% THD+N

RMS continuous power driven into 1 Ohm from 20 to 250Hz @ 14.4VDC with lessthan 1% THD+N.

RMS continuous power driven into 2 Ohms from 20 to 250Hz @ 14.4VDC with lessthan 1% THD+N.

CEA SPECIFICATIONS

MULTIPLE AMPLIFIER COMBINATIONS

The PA400.1, PA600.1, and PA1200.1 subwoofer amplifiers
can also be used in Multiples of the MASTER/SLAVE combi-
nations allowing for unlimited expansion to a system’s sub-
woofer section. To use multiples of amplifier combinations
the following directions must be adhered to for best results.
• Audio Signal—Divide the head unit or processor

audio signal to the master amplifiers by using RCA Y
adapters. Be sure to divide them an even number of
times to ensure the input level at each master ampli-
fier is matched.

• Amplifier Configuration—Set up each MASTER/

SLAVE amplifier combination as described for the
combination type being used. (Refer to the Parallel
Synced Gain or the External Synced Bridged section
of this guide for amplifier and speaker connection
descriptions.)

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.

• Because this amplifier is only designed for subwoofer

applications, the low-pass crossover is active at all
times. The crossover point is adjustable to allow
more precise system operation.

• 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. 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. 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.

• For systems using the Remote Sub Level Adjustment,

increase the subwoofer gain on the amplifier by 25%
and set the Remote Sub Level knob to the center position
after making all system gain and filter adjustments.
This will give the Remote Sub Level Control a wider
range of adjustment to the subwoofer output.

• You should take into consideration the effect that gain

adjustment has on system frequency response and
staging. Again, plan on spending some time with music
that you know getting the gain and crossover settings
the way you like. Test discs and analyzers may help
with this process, but in the end it’s your ears that
count, listen to the music!

LED TUBE INSTALLATION (OPTIONAL)

NOTE: If the optional fan IS NOT being used, we recom-
mend that the second LED tube be wired to this circuit. If the
optional fan is being used, we recommend that the second
LED tube be wired in parallel with the first LED tube.