CP700 COMMERCIAL POWER AMPLIFIER
OWNER'S MANUAL
9.Stereo/Parallel/Bridge Switch
This 3 position switch changes the operating mode of the CP700. DO NOT move this switch when the amplifi er is powered up and connected to a load!
•Stereo - When the switch is in this position, the CP700 operates as two independent amplifi ers. Use this position for stereo program material or for two discreet paging/sound masking zones.
•Parallel - When the switch is in this position and a mono input signal is to be used, connect the input wiring to either channel one OR channel two. 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 in this position, connect your mono input signal to channel one ONLY. The speaker load is connected across the two positive terminals as shown in Figure 7 on page 10. The CP700 will deliver approximately twice the voltage across the load. Please observe the minimum load specifi cation when operating in Bridge mode.
10.CH1/CH2, Low Impedance Speaker Outputs
The CP700 direct speaker outputs bypass the internal constant voltage transformers and are used for direct connection to loudspeakers. The CP700 will operate into 2, 4, and 8 Ohm loads. The use of appropriately sized spade lugs is recommended for speaker wire termination; connect the speaker line common to the
For high power applications, use the proper gauge wire for the speaker connections. Contact Atlas Sound Tech Support
11.CH1/CH2, 25/70.7/100V Speaker Outputs
The CP700 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 whatever voltage your system requires for proper operation.
Calculating Constant Voltage Loads
To calculate the maximum quantity of transformer coupled loudspeakers you can safely connect to the CP700, fi rst add up the total number of speakers that will be connected to one channel of the CP700, 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 CP700. In this case, one channel of the CP700 can supply 350W of power at 70.7V, so derate this by 20%, leaving 280W of power available for constant voltage speakers.
Note: A 6dB 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 minus terminal on input 2. Short lengths of 22 gauge wire can be used.
Specifications are subject to change without notice
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