Crown 1400 CSL Manual de referencia - Página 6

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2 Installation

Always remove power from the unit and turn the level

controls off when making connections . This reduces the

chance of loudspeaker damage from loud blasts.

Follow the guidelines listed next as well as the steps

required for the specific mode of operation:

1. Install the amplifier in a standard 19 inch (48.3 cm) rack

or place it on a stable surface. The mounting dimensions

are 19 inches (48.3 cm) wide, 3.5 inches (8.9 cm) tall

and 16 inches (40.6 cm) deep behind the mounting sur-

face. IMPORTANT! Allow for adequate ventilation.

43.2 cm

IMPORTANT: Be sure the back of

the amplifier is supported.

AIR

FLOW

16 in

AMPLIFIER

40.6 cm

(TOP VIEW)

2 in

MIN.

AIR FLOW

Fig. 2.1 Do NOT Block Air Flow

2. Use high-quality loudspeaker cables to connect the load

to the amplifier's output jacks. Do not use shielded

cable. Banana plugs are recommended for this connec-

tion.

3. Use shielded cables to connect audio sources to the

amplifier inputs. Either balanced or unbalanced wiring

can be used as shown below. (XLR connectors are avail-

BALANCED

GND

–

FROM

INPUT

PREAMPLIFIER

–

SHIELD

Fig. 2.2 CSL Input Wiring

able with the MT-XLR accessory. See Section 5.)

4. An appropriate AC cord and plug are provided. Use an

isolated wall outlet with the correct voltage and ad-

equate current. Voltages more than 10% over the

amplifier's rated voltage may damage the ±15 volt regu-

Page 6

17 in

AIR

FLOW

RACK

CABINET

UNBALANCED

SHIELD

FROM

INPUT

PREAMPLIFIER

SHIELD

lator, filter capacitors and output transistors.

2.1 Stereo

1. Turn the level controls down (fully counterclockwise) and

turn off the amplifier.

2. Set the back panel stereo/mono switch to Stereo.

3. If present, remove the Parallel-Mono jumper.

4. Connect the input and output cables as shown in the first

example in Figure 2.3.

5. Turn on the amplifier and adjust the level for each chan-

nel with the back panel level controls.

CAUTION: In Stereo mode, never parallel the two

outputs by directly tying them together, and never

parallel them with the output of another amplifier.

2.2 Mono

The monaural operating modes provide twice the

power to one channel as the Stereo mode. In Bridge-

Mono mode, the outputs are wired in series for twice

the output voltage. In Parallel-Mono mode, the outputs

are paralleled for twice the current capacity.

Bridge-Mono mode is provided for loads with an im-

pedance greater than 4 ohms. Parallel-Mono mode

should be used with loads of 4 ohms or less.

B R I D G E - M O N O

1. Turn the level controls down (fully counterclockwise) and

turn off the amplifier.

2. Set the back panel stereo/mono switch to Bridge-Mono.

3. If present, remove the Parallel-Mono jumper.

4. Connect the input and output cables as shown in the

second example in Figure 2.3. Use the Ch.1 input only.

5. Make sure the load is balanced (neither side shorted to

ground) and do not use the black (–) banana jacks.

6. Turn on the amplifier and adjust the level. Use the Ch.1

level control only.

P A R A L L E L - M O N O

1. Turn down the level controls (fully counterclockwise) and

turn off the amplifier.

2. Set the back panel stereo/mono switch to Parallel-Mono.

3. Install a solid jumper (at least 14 gauge) across the out-

put between the two red (+) banana jacks.

4. Connect the input and output cables as shown in the

third example in Figure 2.3. Use the Ch.1 input only.

5. Turn on the amplifier and adjust the level. Use the Ch.1

level control only.

CAUTION: When wired for Parallel-Mono mode, do

not attempt to operate the amplifier in Stereo or

Bridge-Mono mode until the output jumper is re-

moved. Failure to do so will result in inefficient op-

CSL Series Power Amplifiers