21
Single-Ended Bridging Kit
1
2
3
1
2
3
Female RCA Input
Skirt: signal ground
Center: (non-inverting)
Male XLR Output (normal)
Pin 1: signal ground
Pin 2: (non-inverting)
Pin 3: signal ground
Male XLR Output (inverted)
Pin 1: signal ground
Pin 2: signal ground
Pin 3: (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 Balanced Bridging Output Adapter is simply a heavy-gauge copper bar (sil-
ver- and gold-plated) used to strap two of the output ground terminals together.
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:
1
DISCONNECT YOUR AMPLIFIER FROM EVERYTHING
Start with your amplifier totally disconnected from inputs, outputs, and AC
power. It is always best to power down an amplifier before changing connec-
tions; here you are changing its basic configuration, making it essential.
2
CONNECT THE SINGLE-ENDED BRIDGING INPUT ADAPTER TO THE AMP’S
INPUTS
Connect the two male XLRs to two inputs of your amplifier, noting which
XLR is marked red and which is black. The channel with the red, normal
input will later be connected to the red, positive terminal of your loud-
speaker.
