Macro-Tech
®
602/1202/2402 Power Amplifiers
Page 10
Reference Manual
Fig. 2.2 Rear Panel Controls & Connectors
(Note: Reset Switches (Item I) only available on the Macro-Tech
2402 model.)
drive a single channel with an impedance less than 4
ohms.
Important: Turn off the amplifier before chang-
ing the stereo/mono switch (see Section 3.3).
I. Reset Switches (Macro-Tech 2402 only)
The Macro-Tech 2402 has a back panel Reset switch
for each channel. Each switch resets the circuit breaker
that protects the channel’s power supply from overload.
J. PIP Module
The standard PIP2-FXQ is included with your amplifier.
It provides female three-pin XLR input connectors. A
variety of other PIP modules can be used in place of the
PIP2-FXQ. They add additional features that customize
the amplifier for different applications (see Section 8.1
for information on available PIP modules).
❑ Input Sensitivity Switch (not shown)
The three-position input sensitivity switch located inside
the amplifier can be set after removing the PIP module
(J). It is set at the factory to 0.775 volts for standard 1-
kHz output into 8 ohms. It can also be set to 1.4 volts for
standard 1-kHz output into 8 ohms, or a fixed voltage
gain of 26 dB (see Section 4.4).
K. Balanced Phone Jack Inputs
Balanced
1
/4-inch phone jack input connectors are pro-
vided on the PIP2-FXQ. The phone jacks can be wired
for either balanced (tip, ring and sleeve) or unbalanced
(tip and sleeve) input signals. Caution: The Channel 2
input should NOT be used in either Bridge Mono or
Parallel Mono mode.
L. Balanced XLR Inputs
The factory-installed PIP2-FXQ provides a three-pin fe-
male XLR connector for balanced input to each chan-
nel. The XLR inputs are connected in parallel with the
amplifier’s phone jack inputs. Because the PIP2-FXQ
does not have any active circuitry, its XLR connectors
can also be used as “daisy chain” outputs to connect
signals from phone jack inputs to multiple amplifiers
(see Section 3.3.4). Caution: The Channel 2 input
should NOT be used in either Bridge Mono or Paral-
lel Mono mode.
M. Output Jacks
A pair of versatile 5-way binding posts is provided for
the output of each channel. The 5-way binding posts
accept banana plugs, spade lugs or bare wire. (Euro-
pean models do not accept banana plugs.)
N. Input Ground Lift Switch
The input ground lift switch is located on the PIP2-FXQ.
It is used to isolate the input signal grounds from the AC
(chassis) ground to help prevent ground loops that can
result in unwanted hum and noise (see Section 3.3.4 for
more information about preventing ground loops).
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