37 Channel Low (Woofer) Output
These seven balanced audio outputs carry the room-corrected “low pass” portion of the audio spectrum, and must be connected to the amplifiers that drive the woofer sections of the loudspeakers.
The pin assignments of this XLR-type male output connector are:
Pin 1: Chassis ground
12 Pin 2: Signal + (non-inverting)
3Pin 3: Signal – (inverting)
Connector ground lug: chassis ground
These pin assignments are consistent with the standards adopted by the Audio Engineering Society, and are used with the purpose-designed SA- series power amplifiers from Wisdom Audio. If you elect to use a different amplifier for your woofers, please refer to the operating manual of your power amplifier to verify that the pin assignments of its input connectors correspond to your Wisdom Audio SC-1. If not, wire the cables so that the appropriate output pin connects to the equivalent input pin, in order to preserve the polarity of the musical signal.
If your power amplifier does not have balanced inputs, the adapter used to convert from balanced to single-ended must “float” Pin 3 (the inverted signal). This can easily be checked with an ohmmeter: the impedance be- tween Pin 3 and either the center pin or the shield skirt on the RCA should be infinite. Tying the output of Pin 3 to ground (as some adapters do) will compromise the performance of the SC-1. Should you need them, prop- erly wired adapters are available from Wisdom Audio for an additional charge.
43 Channel Subwoofer Output
These three balanced audio outputs carry the room-corrected sub- woofer outputs, and must be connected to the amplifiers that drive the subwoofer(s) in the system.
The pin assignments of this XLR-type male output connector are:
Pin 1: Chassis ground
12 Pin 2: Signal + (non-inverting)
3Pin 3: Signal – (inverting)
Connector ground lug: chassis ground
These pin assignments are consistent with the standards adopted by the Audio Engineering Society. Refer to the operating manual of your power amplifier to verify that the pin assignments of its input connectors cor- respond to your Wisdom Audio SC-1. If not, wire the cables so that the appropriate output pin connects to the equivalent input pin, in order to preserve the polarity of the musical signal.
If your power amplifier does not have balanced inputs, the adapter used to convert from balanced to single-ended must “float” Pin 3 (the inverted signal). This can easily be checked with an ohmmeter: the impedance be- tween Pin 3 and either the center pin or the shield skirt on the RCA should be infinite. Tying the output of Pin 3 to ground (as some adapters do) will compromise the performance of the SC-1. Should you need them, prop-
