Crown ce-4000 Guía De Referencia

Crown International, Inc.

P.O. Box 1000

Elkhart, IN 46515-1000

TEL: 219-294-8200

FAX: 219-294-8FAX

www.crownaudio.com

CE 4000

08/00                                                            131511-1  

 

For more details refer to the applicable Reference Manual or 

Contact Crown Audio Technical Support. The provided data 

should not be construed as specifications.

Crown is a registered trademark of Crown International, Inc. 

Printed in U.S.A.
© 2000 Crown International, Inc.

This document provides detailed information about the amount of power 

and current drawn from the AC mains by the CE 4000 amplifier and 

the amount of heat produced under various conditions. The calculations 

presented here are intended to provide a realistic and reliable depiction of 

the amplifier. The following assumptions or approximations were made:

•    The  amplifier’s  available  channels  are  loaded  and  full  power  is  being 

delivered.

•    The  amplifier  efficiency  at  standard  1-kHz  power  is  estimated  to  be 

77%.

•    Quiescent power draw is approximately 140 watts.
•    When  running  at  full  speed,  typical  power  draw  for  the  internal  fan 

is 12 watts or less.

•    The estimated duty cycles take into account the typical crest factor for 

each type of source material.

•    Duty cycle of pink noise is 50%.
•    Duty cycle of highly compressed rock ‘n’ roll midrange is 40%.
•    Duty cycle of rock ‘n’ roll is 30%.
•    Duty cycle of background music is 20%.
•    Duty cycle of continuous speech is 10%.
•    Duty cycle of infrequent, short duration paging is 1%.

Here are the equations used to calculate the data presented in Figure 1:

The following equation converts power draw in watts to current draw in 

amperes:

The value used for Power Factor is 0.98. The Power Factor variable is 

needed to compensate for the difference in phase between the AC mains 

voltage and current. The following equation is used to calculate thermal 

dissipation:

The value used for inefficiency is 0.23 (1.00–0.77). The factor 3.415 

converts watts to btu/hr. Thermal dissipation in btu is divided by the 

constant 3.968 to get kcal. If you plan to measure output power under 

real-world conditions, the following equation may also be helpful:

  CE 4000

 LOAD

Duty

Cycle

Current Draw(Amps) Thermal Dissipation

Thermal Dissipation

Thermal Dissipation

Current Draw(Amps)

Current Draw(Amps)

AC Mains

Power

Draw

(Watts)

AC Mains

Power

Draw

(Watts)

AC Mains

Power

Draw

(Watts)

100-120    230-240   btu/hr        kcal/hr

151

601

         

1.3

             

2.5

           

296

            

182

           

723

       

1.9

               

3.8

           

452

           

213

            

845

         

2.6

             

5.2

            

607

           

182

723         

1.9             

3.8           

452            

244           

968       

3.3               

6.5           

796           

306            

1213        

4.6            

9.1            

1075         

231

845         

2.6             

5.2           

608            

306           

1213       

4.6             

9.1           

1075          

398           

1580        

6.6            

13.1          

1542         

244

968         

3.3             

6.5           

763            

367           

1457       

5.9             

11.8          

1387         

491           

1947        

8.6            

17.1          

2010         

275

1090        

3.9            

7.8           

919            

429           

1702       

7.2             

14.4          

1698         

583           

2314        

10.6          

21.1          

2478         

100-120    230-240   btu/hr        kcal/hr

100-120    230-240   btu/hr        kcal/hr

50%
40%
30%
20%
10%

8 DUAL / 16 BRIDGE

Ω 

Ω 

4Ω 

Ω

DUAL / 8 BRIDGE

2Ω 

Ω

DUAL / 8 BRIDGE