Macro-Tech 24x6 Reference Manual - page 9
Page 9
Macro-Tech 24x6 & 36x12 Power Amplifiers
Fig. 2.2 Rear Facilities
H. Reset Switches
The reset switches are used to reset the breakers that
safeguard each power supply from overload.
I.
P.I.P.
Module
The standard P.I.P.-FX is included with your amplifier. It
provides female XLR input connectors. A variety of
other
P.I.P. modules can be used in place of the
P.I.P.-FX. They add additional features that customize
the amplifier for different applications (see Section 8.1
for information on available
P.I.P. modules).
❑ Input Sensitivity Switch
The three-position input sensitivity switch located in-
side the amplifier is accessed by removing the
P.I.P.
module (I). It is factory-set to 0.775 volts for rated 8
ohm output. It can also be set to 1.4 volts for rated
output, or a voltage gain of 26 dB (see Section 4.4).
J. Balanced Phone Jack Inputs
Balanced ¼-inch phone jack input connectors are pro-
vided on the back panel of your amplifier. The phone
jacks can be wired for either balanced (tip, ring and
sleeve) or unbalanced (tip and sleeve) input signals.
Because they are electrically in parallel with the
P.I.P.
input connectors, input signals should not be con-
nected to the phone jacks when certain
P.I.P. modules
are installed (see Section 3.3.4). The phone jacks can
also be used as “daisy chain” outputs to simplify con-
necting input signals to multiple amplifiers.
K. Ground Lift Switch
This switch isolates or “lifts” the phone jack signal
grounds from the AC power ground. Activating the
switch inserts an impedance between the sleeve of
each phone jack and the unit’s AC ground to help pre-
vent the hum that can result from a ground loop.
L. Balanced XLR Inputs
The factory-installed P.I.P.-FX 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 P.I.P.-FX
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).
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.
Note:
Because of its higher output power, the Macro-Tech
36x12 has an additional set of binding posts.
UNBALANCED
INPUT WIRING
BALANCED
INPUT WIRING
THIS AMPLIFIER IS EQUIPPED WITH SELECTABLE INPUT SENSITIVITY. REMOVE P.I.P. MODULE TO ACCESS SENSITIVITY SWITCH.
CH-2
CH-1
+
–
TIP
RING
SLEEVE
GND
INPUT GROUND LIFT
+
TIP
SLEEVE
GND
(AFFECTS PHONE INPUTS ONLY.)
INPUTS
PUSH TO RESET
LIFT
REG. U.S. PAT. OFF.
4,330,809
4,611,180
P
R
ES
S
R E
S
E
T
P
R
ES
S
R E
S
E
T
Programmable
Input Processor (P.I.P.)
3
1
2
GND
I N P U T
I N P U T
C H - 2
C H - 1
PUSH
PUSH
FX
®
INTERNATIONAL, INC.
ELECTRONIC EQUIPMENT
ELKHART, IN 46517
MADE IN U.S.A.
SERIAL NUMBER
0000
000000
CLASS 1 OUTPUT
WIRING REQUIRED.
CH-2 OUTPUT
(1200)
CH-1 OUTPUTS
(3600)
CAUTION:
TO PREVENT ELECTRIC SHOCK DO NOT REMOVE TOP OR
BOTTOM COVERS. NO USER SERVICEABLE PARTS INSIDE. REFER SER-
VICING TO QUALIFIED SERVICE PERSONNEL. DISCONNECT POWER CORD
BEFORE REMOVING REAR P.I.P. MODULE TO ACCESS GAIN SWITCH.
ATTENTION:
DÉBRANCHER AVANT D'OUVRIR.
WARNING:
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO
NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.
(3600)
(1200)
100 VAC / 17.5 A / 50-60 Hz
120 VAC / 16.5 A / 60 Hz
G
H
I
J
L
J
L
K
M
M
M