Input Connection; Unbalanced Input Wiring; Balanced Input Wiring; Balanced And Unbalanced Phone Plugs - Crown Macro-Tech 602, Macro-Tech 1202 Reference Manual

Macro-Tech ® 602/1202/2402 Power Amplifiers

3.3.4 Input Connection

Both the balanced XLR and phone jack inputs have a
nominal impedance of 20 k ohms (10 k ohms with un-
balanced wiring) and will accept the line-level output of
most devices. Female three-pin XLR input connectors
and 1 / -inch jacks are provided on the standard
4
PIP2-FXQ input module (other PIP modules are de-
scribed in Section 8.1). Correct input wiring will depend
on two factors: (1) whether the input signals are bal-
anced or unbalanced, and (2) whether the signal source
Fig. 3.7 Unbalanced Input Wiring
Reference Manual
Fig. 3.8 Balanced Input Wiring
floats or has a ground reference. Figures 3.7 and 3.8
show the recommended connection techniques for
each type of signal source.
The amplifier's built-in 1 / -inch phone jack input connec-
4
tors can be wired similarly for balanced or unbalanced,
floating or ground-referenced sources. They have a
standard tip-ring-sleeve (TRS) configuration: the tip is
positive (+), the ring is negative (–) and the sleeve is
chassis (see Figure 3.9). Wiring for various sources fol-
lows the XLR wiring guidelines shown in Figures 3.7
and 3.8.
Fig. 3.9 Balanced and Unbalanced Phone Plugs
Page 15