If your system calls for multiple outputs from the Nº380 (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 Nº380 can easily drive multiple power am- plifiers.
2SINGLE-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 Nº380 enable it to be used optimally with a surround sound proces- sor as one of its inputs. We do not recommend having a surround sound processor follow the Nº380 in the signal path. (For more information, see “Using Surround Sound Processors.”)
3BALANCED 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 | Pin 1: Signal ground |
| 2 | 1 | Pin 2: Signal + (non-inverting) |
| Pin 3: Signal – (inverting) |
| 3 | |
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 Nº380. If not, wire the cables so that the appropriate output pin con- nects to the equivalent input pin.
If you won’t be using the Nº380’s 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
22-gauge
3 bus wire
Male RCA | Male XLR |
(connect to source) | (connect to Nº380) |
