Atlas CP400 Gebruikershandleiding - Pagina 6

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CP400 & CP700 COMMERCIAL

POWER AMPLIFIER

9. Stereo/Parallel/Bridge Switch

This 3 position switch changes the operating mode of the amplifier. DO NOT move this switch when

the amplifier is powered up and connected to a load.

• Stereo - When the switch is set to this position, the amplifier operates as two independent

amplifiers. Use this position for stereo program material or for two discreet paging/sound

masking zones.

• Parallel - When the switch is set to this position a single mono input signal is to be used.

Connect the input wiring to either channel 1 OR channel 2. The one input signal will drive both

amp channels. Use this position when two speaker zones are being fed by a mono signal.

(See note below)

• Bridge - When the switch is set to this position, connect the mono input signal to channel 1

ONLy. The speaker load is connected across the two positive terminals as shown in Figure 7 on

page 10. The amplifier will deliver approximately twice the voltage across the load. Please

observe the minimum load specification when operating in Bridge mode.

Note: A 6 dB loss of output power will occur when operating in parallel mode. To over come this loss,

connect the positive terminal on input 1 to the positive terminal on input 2 and connect the negative

terminal on input 1 to the negative terminal on input 2. Short lengths of 22-gauge wire can be used.

10. CH1/CH2, Low Impedance Speaker Outputs

The amplifier direct speaker outputs bypass the internal constant voltage transformers and are used

for direct connection to loudspeakers. The amplifier will operate into 2, 4, and 8 Ω loads. The use

of appropriately sized spade lugs is recommended for speaker wire termination; connect the speaker

line common to the "-" terminal and the positive lead to the "+" terminal.

For high power applications, use the proper gauge wire for the speaker connections. Contact

Atlas Sound Tech Support (1-800-876-3333) for assistance in determining the proper size wire.

11. CH1/CH2, 25/70.7/100V Speaker Outputs

The amplifier will drive constant voltage speaker loads for use in commercial business music/paging

systems and sound masking systems. The use of spade lugs for terminating and connecting the

speaker home runs is recommended. The speaker line common connects to the "0" terminal and

the positive lead connects to the desired voltage for required system requires for proper operation

(Figures 8,9,10; Pages 11-12).

Calculating Constant Voltage Loads

To calculate the maximum quantity of transformer coupled loudspeakers you can safely connect

to the amplifier, first add up the total number of speakers that will be connected to one channel

of the amplifier, then multiply that total speaker number by the tap setting you plan to use. The

result will be the load in watts that the amp output channel will see. It is good engineering practice

to leave a 20% margin below the maximum rated output power of the amplifier. In this case, one

channel of the amplifier can supply 350 W of power at 70.7V. Derate this by 20%, leaving 280 W

of power available for constant voltage speakers.

1601 JACK MCKAY BOULEVARD ENNIS, TEXAS 75119 U.S.A. •

Specifications are subject to change without notice

AtlasSound.com

Printed in U.S.A.

OWNER'S MANUAL

TELEPHONE: (800) 876-3333 • FAX: (800) 765-3435

ATS002102 RevD 2/08