Technical information

Page 17

Macro-Tech 5000VZ Power Amplifier

Reference Manual

3.3.4 Input Connection

Both the XLR and ¼-inch phone jack inputs are bal-

anced. They have a minimum impedance of 10 K ohms

(5 K ohms with unbalanced wiring) and will accept the

line-level output of most devices. The XLR connectors

and phone jacks are provided on the standard

PIP2-FXQ input module (other

PIP

and

PIP2

modules

are described in Section 8.1). Correct input wiring will

depend on two factors: (1) whether the input signals

are balanced or unbalanced, and (2) whether the sig-

nal source floats or has a ground reference. Figures

3.7 and 3.8 show the recommended XLR connection

techniques for each type of signal source.

Fig. 3.7 Unbalanced Input Wiring

Fig. 3.9 Balanced and Unbalanced

Phone Plug Wiring

Fig. 3.8 Balanced Input Wiring

The phone jack input connectors can be wired simi-

larly for balanced or unbalanced, ground-referenced

or floating sources. They have a standard tip-ring-

sleeve (TRS) configuration: the tip is positive (+), the

ring is negative (–) and the sleeve is ground (see Fig-

ure 3.9). Wiring for various sources follows the XLR wir-

ing guidelines shown in Figures 3.7 and 3.8.

The XLR and ¼-inch phone jacks provided on the

PIP2-FXQ are wired in parallel. This makes it possible

to use one set for input to the amplifier and the other

set for “daisy-chained” output to other amplifiers.

Please follow the instructions in Section 3.3.2 and 3.3.3

if the amplifier will be used in either Bridge-Mono or

Parallel-Mono mode. Remember, the Channel 2 input

and level control are disconnected in both mono

modes.