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3 CONNECT ONE END OF THE BALANCED BRIDGING OUTPUT ADAPTER
TO TWO SIDE-BY-SIDE BLACK OUTPUT TERMINALS
All Mark Levinson amplifiers have two sets of output terminals per channel,
wired in parallel (for convenience when biwiring). You may use either the
upper or the lower black output terminals. Connect one end of the Bal-
anced Bridging Output Adapter to a black output terminal on one side of
the amplifier, and then connect the other end to a black output terminal on
the other side of the amplifier. (The two connections should be side-by-
side rather than one above the other.) Make sure these connection are snug
and secure.
4 CONNECT YOUR LOUDSPEAKER WIRE ACROSS TWO SIDE-BY-SIDE, RED
OUTPUT TERMINALS
In this case, you may use either the upper or the lower red output termi-
nals. Connect the positive/+/red binding post of your loudspeaker to the
red output terminal associated with the red (normal) side of the Input
Adapter. Connect the negative/–/black binding post of your loudspeaker to
the red output terminal on the other side of the amplifier, the one associ-
ated with the black (inverted) side of the Input Adapter.
Following this connection convention preserves the polarity of the signal
sent to the loudspeaker. In practice, the most important thing is to be con-
sistent throughout the system, as inconsistency will result in out-of-phase
loudspeakers. In turn, this results in unstable imaging and poor bass repro-
duction. (The effect is not dangerous, but neither is it subtle.)
5 CONNECT ONE OUTPUT CHANNEL OF YOUR PREAMPLIFIER TO THE IN-
PUT OF YOUR BRIDGED AMPLIFIER
The female XLR at the junction of the Balanced Bridging Input Adapter is
now the single input to this bridged amplifier.
6 POWER UP YOUR AMPLIFIER
Remember that your Mark Levinson power amplifier incorporates inrush
protection circuitry that allows its power supply to charge up gently, en-
hancing its longevity. Plug the amplifier back into the AC mains; press the
standby button once to bring the amp from off to standby; wait at least ten
seconds; and press the standby button again to bring it from standby to
operate.
7 REPEAT THIS PROCESS WITH YOUR OTHER AMPLIFIER(S)
Single-Ended Bridging If your preamplifier has only single-ended (RCA) outputs, a few details of
bridged operation will differ from the discussion above, all pertaining to the con-
nection of the preamp to the bridged amplifiers. For this discussion, we will as-
sume that you are using a Madrigal Single-Ended Bridging Adapter Kit for each
channel to be bridged. (Alternatively, you may have custom cables built using
your preferred wire and connectors, being careful to follow the wiring diagram
below.)