Crown Audio MA-1202 Manuale Utente

The power cord has an appropriate plug for the required 
voltage. 120 VAC, 60 Hz North American Macro-Tech 
602s and 1202s have 14 AWG line cords and NEMA 5-
15P plugs. Macro-Tech 2402s have 12 AWG line cords 
and NEMA 5-20P plugs. International units are shipped 
with an appropriate line cord and plug. See Section 7 for 
AC power usage.

The three operating modes of a Macro-Tech amplifier are 
controlled by this switch. Stereo mode is used for nor-
mal two-channel operation, Bridge-Mono mode is used 
to drive a single channel with a load impedance of at 
least 4 ohms, and Parallel-Mono mode is used to drive a 
single channel with an impedance less than 4 ohms. 
Important: Turn off the amplifier before changing the ste-
reo/mono switch (see Sections 3.6.2 and 3.6.3).

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.

The standard PIP2-FXQ is included with your amplifier. It 
provides female three-pin XLR input connectors. A vari-
ety 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 5.3.1 
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 3.7).

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.

The factory-installed PIP2-FXQ provides a three-pin 
female 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 sig-
nals from phone jack inputs to multiple amplifiers. Cau-
tion: The Channel 2 input should NOT be used in either 
Bridge-Mono or Parallel-Mono mode.

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. (European 
models do not accept banana plugs.)

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 the Crown Ampli-
fier Application Guide for more information about pre-
venting ground loops).