Rear Facilities - Crown Micro-Tech 600 Reference Manual

Micro-Tech 600/1200/2400 Power Amplifiers
MODEL: MICRO-TECH 2400 SERIES
AC VOLTS: 120 AMPS: 17 60 Hz
MAXIMUM OUTPUT: 900 WATTS
PER CHANNEL INTO 2 OHMS AT 1 KHz
WITH NO MORE THAN 0.1% THD.
PARALLEL
MONO
REG. U.S. PAT. OFF.
4,330,809
4,611,180 CAUTION:
BEFORE CHANGING THIS SWITCH!
F
I. Cover Plate
This cover plate is removed when changing the
amplifier's input sensitivity (see Section 4.4) or install-
ing an MT-XLR or MT-BB accessory (see Section 8.2).
Input Sensitivity Switch
The three-position input sensitivity switch is located in-
side the amplifier behind the cover plate (I). Settings
include 0.775 volts and 1.4 volts for standard 1 kHz
power, and 26 dB gain (see Section 4.4).
J. Level Controls
These back panel level controls are used to set the
amplifier's output levels (see Section 4.4). Be sure to
turn down the channel 2 level control (fully counter-
clockwise) when operating in Bridge-Mono mode.
K. Balanced Phone Jack Inputs
A balanced ¼-inch phone jack input is provided for
PUSH TO RESET
CAUTION:
THIS COVER IS NECESSARY FOR
EFFICIENT COOLING OF THE AMPLIFIER.
REMOVE ONLY TO ACCESS GAIN SWITCH.
THIS AMPLIFIER IS EQUIPPED WITH SELECTABLE INPUT SENSITIVITY. REMOVE COVER PLATE (ABOVE) TO ACCESS SENSITIVITY SWITCH.
CH-2
6
5 7
4 8
STEREO
3 9
BRIDGE 2
BALANCED 10
MONO INPUT WIRING
1 11
0 12
+
TIP INPUT
GAIN
TURN OFF AMPLIFIER –
RING
GND SLEEVE
G H I J K
Fig. 2.2 Rear Facilities
CH-1
6
5 7
4 8
3 9
2
10 UNBALANCED
INPUT GROUND LIFT
INPUT WIRING
1 11
0 12
LIFT +
INPUT
GAIN
(AFFECTS PHONE INPUTS ONLY.) (MONO)
GND SLEEVE
L K J
each channel. They may be wired for balanced (tip,
ring and sleeve) or unbalanced (tip and sleeve) opera-
tion (refer to Section 3.3.4). XLR and barrier block in-
put connectors are available with the MT-XLR and
MT-BB accessories (see Section 8.2). Caution: Do not
use the channel 2 input in either mono mode.
L. Ground Lift Switch
This switch is used to isolate the phone jack signal
grounds from the AC power (chassis) ground. Moving
the switch to the "lift" position helps prevent the hum
associated with ground loops (see Section 4.4).
M. Output Jacks
A pair of versatile binding posts is provided for output
connection to each channel. Loudspeakers can be
easily connected using banana plugs, spade lugs or
bare wire (European models do not accept banana
plugs). See Section 3.3.
BRIDGE-MONO WIRING
–
1
2
+
OUTPUTS
3
CLASS 1
OUTPUT
WIRING
REQUIRED.
CH-2 CH-1
PARALLEL-MONO WIRING
+
1
2
WARNING:
TO REDUCE THE RISK OF FIRE OR
ELECTRIC SHOCK DO NOT EXPOSE THIS EQUIPMENT –
TO RAIN OR MOISTURE.
3
INTERNATIONAL, INC.
®
ELECTRONIC EQUIPMENT
4
ELKHART, IN 46517
0000
TIP MADE IN U.S.A.
000000
SERIAL NUMBER
M M
TURN AMPLIFIER OFF.
SET STEREO/MONO
SWITCH TO
BRIDGE-MONO.
OUTPUT ACROSS
RED TERMINALS
ONLY. (CH-1
IS POSITIVE.)
TURN AMPLIFIER OFF.
SET STEREO/MONO
SWITCH TO
PARALLEL-MONO.
ADD JUMPER (14
GAGE OR LARGER)
ACROSS RED
TERMINALS.
OUTPUT ACROSS CH-1
TERMINALS ONLY.
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