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Channel Configurations, Audio
Connections and Speaker Connections

The PA 4000 is a versatile multichannel, multi-
purpose amplifier that is designed to operate in
a variety of operating modes. Depending on
your specific application requirements, the
PA 4000 can power two, three or four output
pairs and it can feed all outputs from a single
source, or two different sources may be used.
The specifics of how the audio inputs and
speaker outputs are connected will vary accord-
ing to which of the following operational
modes is chosen:

• One Input/Four Outputs: In this configuration,

a single source is fed to four separate speaker
pairs. Each speaker pair may be adjusted indi-
vidually for output/volume level. This configu-
ration is typically used for multiroom applica-
tions where a single source is sent to four
different room areas.

• One Input/Three Outputs: In this configura-

tion, a single source is fed to three separate
speaker pairs, one with high power output
and two with lower power output. Each
speaker pair may be adjusted individually for
output/volume level. This configuration may
be used for multiroom applications where
one room location requires higher power due
to speaker efficiency or room size considera-
tions, while two other rooms receive a lower
power feed of the same source.

• One Input/Two Outputs: In this configuration,

a single source is fed to two separate, high-
power speaker pairs. Each speaker pair may
be adjusted individually for output/volume
level. This configuration is used where two
high-power output channels are required for
either multiroom use or to power the addi-
tional rear surround channels in 7.1 surround
system installations.

• Two Inputs/Four Outputs: In this configura-

tion, one input source is fed to three output
pairs while a separate input source is fed to
an additional output pair. Each speaker pair
may be adjusted individually for output/vol-
ume. This configuration is used in multi-
zone/multiroom applications where one input
source is fed to three remote room locations
and a second, separate source is fed to a dif-
ferent remote room.

• Two Inputs/Three Outputs: In this configura-

tion, one input source is fed to two output
pairs, one high-power and one with lower
power output. At the same time, a separate
input source is fed to an additional output
pair. Each speaker pair may be adjusted indi-
vidually for output/volume. This configuration
is used in multizone/multiroom applications

where one room requires a high-power feed,
while two other rooms may be fed a separate
source with a lower power feed. This configu-
ration may also be used to send one high-
power feed to the rear channels of a 7.1 sur-
round system while a separate feed is sent to
two remote room locations.

• Two Inputs/Two Outputs: In this configura-

tion, one input source is fed to a single, high-
power output pair, while a separate input
source is fed to an additional high-power
output pair. Each speaker pair may be
adjusted individually for output/volume. This
configuration may be used to simultaneously
power the rear channels of a 7.1 surround
system while a separate high-power feed is
available for a remote zone room.

IMPORTANT SAFETY NOTE: When making
the connections shown on this page, be
certain that the AC power cord is discon-
nected from the PA 4000. This will pre-
vent damage to the amplifier and speak-
ers due to unintended automatic turn-on.
—————————————————

One Input/Four Outputs

This is the standard configuration, and it is the
way the unit is shipped from the factory. If you
wish to have one input feed sent to all four
amplifier channel pairs, leave the Amplifier
Mode Switches as they are and connect the
audio source to the

Main Input

⁄

For this configuration, the speakers should be
connected as shown in Figure 1, with each
channel connected to the appropriate terminals

™

∞

Figure 1

One Input/Three Outputs

In this configuration, the same input signal is
sent to all speakers, but the Channel 1 and
Channel 2 amplifiers are bridged together to
form a higher-output channel.

When this option is desired, connect the
speaker pair for the high-power channel as
shown in Figure 2. Note that markings for

“Bridge 1” should be used, with the connec-
tions to the proper “+” and “–“ terminals with
the two outer-oriented, vertically binding posts
on each side of the channel pair, as opposed to
the horizontal orientation of normal speaker
connections. DO NOT use the standard channel
output and polarity markings for the Channel 1
and Channel 2 amplifiers.

The remaining two speaker pairs for Channel 3
and Channel 4 are connected as shown in
Figure 2, using the standard markings.

In addition to the speaker connections, the
following steps must be followed for this
configuration:
• Connect the audio input source to the

Main

Amp Input Jacks

⁄

• Locate the

Bridge 1 Amplifier Mode

Switch

‡

on the rear panel, and use a #1

Phillips screwdriver to carefully remove the
screws on either side of the plastic switch
guard that is around the switch.

• Remove the plastic guard and set it aside

with the screws.

• Slide the switch to the left so that it is under

the phrase “BRIDGE 1”.

• Replace the plastic switch guard with the two

screws so that the switch is secured in the
proper position.

Figure 2

One Input/Two Outputs

In this configuration, the same signal is sent to
all speakers to deliver two high-power channel
pairs.

When this option is desired, connect the two
speaker pairs as shown in Figure 3. Note that
markings for “Bridge 1” and “Bridge 2” should
be used, with the connections for all speakers
made to the proper “+” and “–“ terminals
with the outer two vertically oriented binding
posts on each side of the channel pair, as
opposed to the horizontal orientation of normal
speaker connections. DO NOT use the standard
channel output and polarity markings for any of
the speaker connections.

+ —

Right Speaker

Left Speaker

Channel 3

+ —

Right Speaker

Left Speaker

Channel 4

CH3

CH4

+ —

Right Speaker