Input Connections
FULL RANGE LINE IN.
Subwoofers have a second set of connectors, one for the left channel’s audio and one for the right channel’s audio.
We recommend balanced connections be used. Balanced con- nections will reduce AC hum and interference, especially with long cable runs. Unbalanced connections may be suitable for short cables. The input impedance is 22k ohm for balanced con- nections or 11k ohm for unbalanced connections. The signal's source impedance should be less than 600 ohms.
HPR122i, HPR152i and HPR153i: Insert the male XLR input into the jack marked FULL RANGE LINE IN. Ensure the connector is fully seated.
HPR151i and HPR181i: Insert the left channel’s XLR input into the left channel’s (L) FULL RANGE LINE IN connector. Insert the right channel’s XLR connector into the right channel’s (R) FULL RANGE LINE IN connector. If a single input signal is used, plug into either the L (left) or R (right) channel’s input.
If two input signals are used, plug the left channel’s signal into the connector marked FULL RANGE LINE IN L (the top input connector) and the right channel’s signal into the con- nector marked FULL RANGE LINE IN R (the bottom input con- nector). When two input signals are applied, the subwoofer’s gain is automatically increased 6dB as the subwoofer will likely be used with two
Balanced inputs: Connect to the plug as shown.
1= shield (ground) 3= minus
2= plus (+)
Unbalanced inputs: Connect to the plug as shown. Pin 3 and pin 1 must be connected with a jumper as shown.
1= shield (ground) 3= jumper to pin 1 2= plus (+)
Subwoofer loudspeaker’s Input (IN) and Output (OUT) Connectors
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