Crown ct-1600 Guía De Referencia

Page 9

Com-Tech 200/400/800/1600  Power Amplifiers

Fig. 2.2  Rear Facilities

This reset switch is used to reset the circuit breaker
that protects the power supplies from overload (see
Sections 4.3.4 and 4.4).

Slide this switch to the center for Dual (two-channel)
mode, to the left for Parallel-Mono mode or to the right
for Bridge-Mono mode. 

WARNING: Do not change this

switch unless the amplifier is turned off. Do not attempt
to use the Bridge-Mono or Parallel-Mono modes unless
both output mode switches (N) are set the same. 

Also,

be sure to follow the installation requirements for each
mode (see Section 3.3.1).

The standard 

P.I.P.-BB is included with your amplifier.

It provides barrier block input connectors. Other 

P.I.P.

modules can be used in place of the 

P.I.P.-BB to pro-

vide additional features that customize the amplifier for
different applications (see Section 8 for 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. It is set at the factory to 0.775 volts for stan-
dard 1 kHz power into 8 ohms. It can also be set to
0.775 volts for standard 1 kHz output in 70 volt mode,
or a standard voltage gain of 26 dB (see Section 4.4).

Each channel’s output level can be adjusted accu-
rately using the 22 position detented level controls on
the back panel. A Lexan cover is also included that
can be used to prevent tampering (see Section 4.4).

The 

P.I.P.-BB is included in the standard configuration.

It provides a balanced barrier block with three termi-
nals for each input channel. (XLR connectors are also
available—see Section 8.1.)

The output mode switches are used to configure each
channel independently for either 8/4 ohm loads or
70 volt (“constant voltage”) lines. 

WARNING: Do not

change these switches unless the amplifier is off. Do
not attempt to use the Bridge-Mono or Parallel-Mono
modes unless these switches are set the same. 

Also,

be sure to follow the special installation requirements
for each mode (see Section 3.3.1).

A barrier block with four terminals is provided for out-
put connection. Output wiring will vary depending on
the selected dual/mono mode and whether 70 volt out-
put will be used (see Section 3.3.1).

PUSH TO RESET

CAUTION: TURN OFF AMPLIFIER

 BEFORE CHANGING THIS SWITCH!

DUAL

BRIDGE

MONO

PARALLEL

MONO

CAUTION: 

BOTH CHANNELS MUST

BE CONFIGURED THE SAME (8/4 OHM
OR 70 VOLT) BEFORE USING EITHER
BRIDGE- OR PARALLEL-MONO MODE.

MODEL:  COM-TECH 200
      AC VOLTS: 120    AMPS: 3.5   60 Hz

RATED OUTPUT:  150 W/CH INTO 4 OHMS
AT 1 KHz WITH 0.1% OR LESS THD.

MAXIMUM OUTPUT:  200 W/CH INTO 4
OHMS AT 1 KHz WITH 0.1% OR LESS THD.

MODEL:  COM-TECH  400 SERIES
      AC VOLTS: 120    AMPS: 5.5   60 Hz

REFER TO OWNER'S MANUAL K80636-2
FOR FIRE PROTECTIVE SIGNALING USE.

REFER TO USER'S MANUAL K80548-9
FOR FIRE PROTECTIVE SIGNALING USE.

0

dB

.5

1

2

3

4

5

6

7

8

9

10

11

13

15

17

19
21

25

32

∞

0

dB

.5

1

2

3

4

5

6

7

8

9

10

11

13

15

17

19
21

25

32

∞

REG. U.S. PAT. OFF.

4,330,809
4,611,180

THIS AMPLIFIER IS EQUIPPED WITH SELECTABLE INPUT SENSITIVITY. REMOVE P.I.P. MODULE TO ACCESS SENSITIVITY SWITCH.

CH-2

CH-1

INPUT ATTENUATION

+

+

70

VOLT

8/4

OHM

70

VOLT

8/4

OHM

CH-2 OUTPUT

CH-1 OUTPUT

BRIDGE-MONO:

 1) TURN AMPLIFIER

OFF. 2) SET DUAL/MONO SWITCH TO
BRIDGE-MONO. 3) OUTPUT ACROSS “

+

”

TERMINALS ONLY (CH-1 IS POSTIVE).

PARALLEL-MONO:

 1) TURN AMPLIFIER

OFF. 2) SET DUAL/MONO SWITCH TO
PARALLEL-MONO. 3) ADD JUMPER (14 GAGE
OR LARGER) ACROSS THE “

+

” TERMINALS

4) OUTPUT ACROSS CH-1 TERMINALS ONLY.

IMPORTANT:

CLASS 1 OUTPUT 

WIRING REQUIRED.

PR

ESS

R E S ET