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If your system calls for multiple outputs from the Nº380S (as might be the
case for “passive” biamplification, for example), you may use balanced Y-
adapters to split each balanced output into two balanced outputs. The low
output impedance (6Ω) of the Nº380S can easily drive multiple power am-
plifiers.
2 SINGLE-ENDED MAIN OUTPUTS
Single-ended (“unbalanced”) outputs using Madrigal-designed RCA jacks are
provided for compatibility with a wide range of associated components, in-
cluding power amplifiers and electronic crossovers.
If you use the single-ended outputs, connect them to the corresponding
inputs of your power amplifier (or other device). Note that special features
of the Nº380S enable it to be used optimally with a surround sound pro-
cessor as one of its inputs. We do not recommend having a surround
sound processor follow the Nº380S in the signal path. (For more informa-
tion, see “Using Surround Sound Processors.”)
3 BALANCED INPUTS 1 AND 2
Accepts right-channel and left-channel balanced signals from source equip-
ment with balanced outputs.
The pin assignments of these XLR-type female input connectors are:
PUSH
21
3
Pin 1: Signal ground
Pin 2: Signal + (non-inverting)
Pin 3: Signal – (inverting)
Connector ground lug: chassis ground
Refer to the operating manuals of your balanced-output line-level sources
to verify that the pin assignments of their output connectors correspond to
the Nº380S. If not, wire the cables so that the appropriate output pin con-
nects to the equivalent input pin.
Note: If you won’t be using the Nº380S’ balanced inputs and need
more single-ended inputs, it is possible to fabricate a cable
to connect line-level sources with single-ended output to
these balanced inputs:
1
2
3
Male RCA
(connect to source)
Male XLR
(connect to Nº380
S
)
22-gauge
bus wire