Peavey CKV Series, CKS Series Appendix E Distributed / Constant Voltage Systems, = 5000/ P

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Appendix E - Distributed / Constant Voltage Systems.

A distributed or constant voltage system, as shown in the figure below, uses

 

 

 

 

 

 

 

 

 

Z = 5000/ P

loudspeaker step-down transformers for each speaker. The transformers are

For example, if the total power demanded by the speakers is 200 watts, then:

designed to deliver a specific power level into a specific load impedance

 

 

 

 

 

 

 

 

 

 

V2/P = 25

when a specific voltage (the example here uses 70.7 volts) appears at the pri-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

mary. A speaker transformer usually has taps on its primary, secondary, or

 

 

 

The compensation factor for transformer insertion loss is:

both, so it can be used for several different power levels or speaker imped-

 

 

 

 

 

 

 

 

x = power drawn from distributed line

ances.

 

 

 

 

 

 

 

 

 

 

 

power delivered to speaker = 10 Insertion loss (in dB)/ 10

Each speaker step-down transformer converts the low impedance of its loud-

 

 

 

Therefore, a speaker transformer with an insertion loss of 1 dB, tapped at 4

speaker to a relatively high impedance as seen by the distributed line.

Consequently, loads can be added or subtracted to the distributed line with

watts, will actually demand 1.26 times 4 watts, or about 5 watts.

very little effect on the actual line voltage, hence the term “constant voltage.”

CKV Series amplifiers are specifically designed for use with distributed or

 

 

 

 

 

 

 

 

 

The actual line load Z that the amplifier “sees” is determined by the formula

constant voltage systems. Each CKV Series model can drive two distributed

 

 

Z = V2/P

lines (one per channel) of the type for which they are configured, any number

 

 

of tapped loudspeakers can be placed on a line as long as the total demanded

where P is the sum of the loudspeaker power taps, compensated for trans-

power including insertion losses does not exceed the rated power of the

former insertion loss;

model chosen.

(P = X [xfrmr#1] * P [speaker#1] + X [xfrmr#2] * P [speaker#2] + ...),

If the impedance of a distributed line overly stresses the amplifier output

and V is the distributed line voltage. So, for a 70.7 volt line,

stage, the amplifier’s IGM protection circuits engage, reducing gain in order

to protect the amplifier.

 

Z = (70.7)2 / P

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Appendix E

Crest Audio CK Power Processing Amplifiers

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Contents Power Processing Amplifiers Important Precautions Table of Contents Introduction Front ViewSide View Amplifier Quick Set-Up Installation and MountingUnpacking Front PanelRear Panel OperationTwo Channel Stereo Mode PowerSaveMode Configuration Parallel ModeInput Bay Input Module JumpersPower/Output Bay Network BayModule Removal Signal Ground Signal Ground Lift JumperReplacing or Installing a Network Module Lift JumperTourClass Protection Features Sequential Turn-On/Turn-Off Standard Sequential Turn-On/OffAmplifiers Appendices Appendix a CKS Series Specifications CKS100 CKS200 CKS400 CKS800 CKS800-2 CKS1200-2 CKS1600-2Appendix B CKV Series Specifications CKV2400Appendix C CKX Series Specifications CKX800Appendix D Wire Gauge Charts Appendix E Distributed / Constant Voltage Systems = 5000/ PCrest Audio CK Power Processing Amplifiers Power is serious business