Bridge And Parallel Modes - Samson MXS3000 Owner's Manual

Bridge and Parallel Modes

both power amplifiers bridged together, producing a single output signal.
Bridge Mode
INPUT
CHANNEL
1(+) OUTPUT
CHANNEL
2(+) OUTPUT
When using the binding post outputs in Bridge mode, be sure to connect your
loudspeaker with the red (+) terminal of the Ch A output connected to the positive input
of the speaker and the red (+) terminal of the Ch B output connected to the negative
input of the speaker. Do not use the black ground (-) output terminal of either channel.
Bridge Wiring
1- 1+
2+ 2-
+1 +2 Connected
When the rear panel switch is placed in the PARALLEL position, the MXS Series operates
in an input parallel mode. In this mode, only the signal present at the Ch A input is
used. This signal is then routed to both the Ch A and Ch B power amplifiers, thus
producing a dual mono output.
12
The MXS amplifiers provide a rear-panel switch that allows it to
be used in either a Bridge or Parallel mode. When this switch is
placed in the STEREO position, the MXS amplifier functions as a
true stereo amplifier, where both of the two independent amplifier
channels (Ch A and Ch B) can receive different input signals and
produce independent output signals. However, when the switch is
placed in the BRIDGE position, the Ch A input signal is routed to
The illustration on the left shows how this works. In Bridge
mode, the polarity (phase) of the Ch B output signal is
reversed relative to that of the Ch A output signal. Both
channels then process the same input signal, with the
speaker load connected so that power is derived from both
channels. The effective voltage swing seen by the load is
thus doubled, so that the power output is multiplied by more
four.
You can also use an Speakon® connector,
plugged into the CH A output, wired +1 for
the positive input of the speaker and +2 for
the negative input of the speaker.