Proceed HPA2 - Manual (Page 20)

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be bridged. (Alternatively, you may have custom cables built using your preferred
wire and connectors, being careful to follow the wiring diagram below.)
Single-Ended Bridging Kit
1 2
3
1 2
3
Female RCA Input
Skirt: signal ground
Center: signal + (non-inverting)
Male XLR Output (normal)
Pin 1: signal ground
Pin 2: signal + (non-inverting)
Pin 3: signal ground
Male XLR Output (inverted)
Pin 1: signal ground
Pin 2: signal ground
Pin 3: signal + (non-inverting)
Single-Ended Bridging
Input Adapter
(pin configuration)
Bridging Output Adapter
(not drawn to scale)
The “normal” leg of the Madrigal Single-Ended Bridging Input Adapter will be
marked with a red stripe to indicate positive polarity, and the inverted leg will be
marked with a black stripe to indicate inverted polarity (corresponding to the red
and black terminals of your loudspeaker).
The Single-Ended Bridging Output Adapter is simply a heavy-gauge copper bar
(silver- and gold-plated) used to strap two of the output ground terminals to-
gether. This establishes a common reference for the amplifier and completes the
circuit that includes the loudspeakers.
Important! Do not attempt to operate your amplifier in a bridged mode
without first strapping the black output terminals together.
Failure to establish a common ground reference between the
two channels can damage your amplifier by forcing
significant currents to flow where they do not belong!
To bridge your Proceed amplifier using a single-ended (RCA) input signal, follow
these steps: