ALLEN & HEATH DR128 User's Guide download pdf (Page 22)

22 DR66 & DR128 Installer User Guide

XLR Output Connections

Differentially balanced, low impedance line level outputs are provided on XLR. These are capable

of driving long cable runs to the amplifier racks without loss or interference pickup. Use balanced

connections wherever possible. To drive unbalanced equipment inputs wire the plug as shown on

the right. Use high grade shielded cables for audio connections.

Calibrating Output Level

DR66 Set the internal jumper in the –10dBV position to match low level equipment, or in the

+4dBu position to match high level equipment. The high position is best for +4dBu or 0dBu

professional equipment. DR128 Adjust the internal trimmer by carefully inserting a small flat

bladed screwdriver through the access hole shown, locating it in the trimmer slot and rotating it to

set the output operating level over its 12dB range to match the destination equipment. Adjust from

+4dBu to –8dBu (-10dBV). Do not use excessive force.

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ALLEN & HEATH DR128 User's Guide Page 22