Polk Audio PA400.1 User Manual

Page 7

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

FIGURE 6—EXTERNAL SYNCED BRIDGED (PA600.1/PA1200.1)

SLAVE AMPLIFIER

MASTER AMPLIFIER

NOTE: The dual (+) and (-) sub-out terminals are paralleled internally and the combined load impedance
should be taken into consideration when connecting multiple subwoofers.

Subwoofer Wiring (top view)

EXTERNAL SYNCED BRIDGED
CONNECTIONS/SETTINGS

1. Input Signal—Connect these RCA jacks as described

in the Front Panel Connection section of this guide.

2. SLAVE/MASTER Switch—

• Set the SLAVE/MASTER switch on the master

amplifier to the MASTER position.

• Set the SLAVE/MASTER switch on the slave

amplifier to the SLAVE position.

• Setting the SLAVE/MASTER switch on both

amplifiers will automatically set the I/O RCA
jack configuration according to each amplifiers
slave or master designation.

NOTE: Amplifiers in this combination can only be connect-
ed in matched pairs. Multiple Matched pairs may be added
to drive separate subwoofer loads in a given system.

3. Phase Switch— Set the phase switches of all synced

MASTER amps to 0°. Set the phase switches of all
synced SLAVE amps to 180°. The master and slave
amps must be set to the opposite phase mode in order
for External Synced Bridged operation to work.

4. To Achieve Safe, Optimal Performance—The LPF,

Bass EQ, and Subsonic Filter controls on all synced
amps must be set to the same position.

5. Signal Connection—Connect an RCA cable be-

tween the OUT RCA jacks of the Master amplifier
and the INPUT RCA jack of the Slave amplifier as
shown in Figure 6.

6. Subwoofer Speaker Connection—In this amplifier

combination, the Subwoofer speaker terminals of both
amplifiers drive common subwoofer(s). Use the follow-
ing speaker connection diagram when connecting the
subwoofers to the amplifiers. Connect the amplifiers
speaker terminals to any combination of one or more
subwoofers that results in a nominal impedance be-
tween 2 and 4 Ohms. DO NOT connect loads of less
than 2 Ohms when connecting to amplifiers in the
External Synced Bridged combination.

WARNING: Two wires of 12AWG minimum must be
connected between the negative sub out terminals of
the MASTER and SLAVE amplifiers.

WARNING: The amplifier’s gain control is bypassed com-
pletely in SLAVE mode. DO NOT move the MASTER/SLAVE
switch to SLAVE position when the amplifier is connected
and playing. DO NOT connect any signal source to the
amplifier in SLAVE mode that exceeds 200mV.

Master

Slave

Subwoofer Wiring (top view)

M A S T E R

S L AV E