HOTROCK 166XL compressor

INSTALLATION CONSIDERATIONS Input/Output Cable Configurations

Hookups and Cabling

The 166XL is a balanced (differential) unit designed for nominal +4dBu or -10dBV levels; inputs and outputs are 1/4"

tip/ring/sleeve (TRS) phone jacks and XLR-type jacks. The 166XL can be used with either balanced or unbalanced sources and outputs can be used with either balanced or unbalanced loads, provided you use proper cabling. A balanced line is defined as two-conductor shielded cable with the two center conductors carrying the same signal but of opposite polarity with respect to ground. An unbalanced line is generally a single-conductor shielded cable with the cen-

ter conductor carrying the signal and the shield at ground potential.

Input Cable Configurations

The 166XL has an actual input impedance of >40k52 in balanced or unbalanced configurations. This makes the 166XL audio input suitable for use with virtually any source impedance, low or high. The 166XL's input jacks are wired in paral- lel. The phone jack TIP (+) connection is internally wired to the XLR pin 2, the RING (-) is wired to pin 3, and the SLEEVE (shield) is wired to pin 1. Note that pins 2 and 3 are the reverse of certain older dbx and other manufacturer's equipment, but if the same connection is used at both the input and the output, the signal will be correctly polarized ("in phase").

Reversing the input wires to the input terminals will result in the output signal polarity being the opposite of the input signal ("180" out of phase").

Output Cable Considerations The model 166XL's outputs are wired in parallel: either

the XLR-type OUTPUT jack or the 1/4" stereo phone jack are The phone jack TIP (+) connection is internally wired to the XLR pin 2, the RING (-) is capable of driving a 6002 load.

wired to pin 3, and the SLEEVE (shield) is wired to pin 1. Note that pins 2 and 3 are the reverse of certain older dbx and