Macro-Tech 3600VZ Power Amplifier
Page 10
Reference Manual
Fig. 2.2 Rear Facilities
available to drive a single load with an impedance less
than 4 ohms.
Important: Do NOT change this switch
unless the amplifier is first turned off
(see Section
3.3).
I. Reset Buttons (PUSH TO RESET)
These reset buttons are used to reset the breakers that
safeguard the power supplies from overload (see
Section 4.3).
J. PIP Module
Versatile Programmable Input Processor modules pro-
vide flexible expansion features that can be added to
customize the amplifier. PIP modules plug into the con-
nector inside the back panel of the amplifier. A PIP
module’s input connectors are placed in parallel with
the input phone jacks. The P.I.P.
®
-FX is included as a
standard feature to provide balanced XLR inputs. It has
no internal circuitry and can be used along with the in-
put phone jacks to facilitate “daisy chaining” multiple
amplifiers. See Section 8 for a list of available PIP mod-
ules.
K. Balanced Phone Jack Inputs
A balanced ¼ inch phone jack is provided for input to
each channel. They may be used with either balanced
(tip, ring and sleeve) or unbalanced (tip and sleeve)
input wiring (refer to Section 3.3). Because these inputs
are in parallel with the PIP connector, they should not be
used as inputs if the installed PIP has active circuitry.
Caution: The Channel 2 input should NOT be used in
either mono mode.
L. Ground Lift Switch
The input signal ground may be isolated from the AC
ground with this switch to help prevent the hum created
by unwanted ground loops. It affects only the input
phone jacks. It has no affect on the PIP module’s XLR
input connectors. Activating the switch inserts an im-
pedance between the sleeve of each phone input jack
and the circuit ground.
M. Balanced XLR Inputs
A balanced 3-pin female XLR connector is provided for
input to each channel by the P.I.P.-FX, a standard fea-
ture of your amplifier. The XLR connectors are in parallel
with the amplifier’s phone jacks. Because there is no
active circuitry on the PIP, the XLR connectors can be
used at the same time as the phone input jacks for
“daisy chaining” multiple amplifiers.
Caution: The
Channel 2 input should NOT be used in either mono
mode.
N. Output Jacks
Two pairs of dual binding posts are provided for the
output of each channel so multiple loudspeakers can
be connected easily. The connectors accept bare wire
or spade lugs.
❑
Input Sensitivity Switch
The three position input sensitivity switch inside the
amplifier can be accessed by removing the PIP mod-
ule. Settings include 0.775 volts and 1.4 volts for rated
output, and 26 dB voltage gain (see Section 4.4).
