Crown xs4300 プリント

Crown International, Inc.
P.O. Box 1000
Elkhart, IN 46515-1000
TEL: 574-294-8200
FAX: 574-294-8FAX
www.crownaudio.com

L O A D

2 Ohm Stereo

4 Ohm Stereo

8 Ohm Stereo

Duty

Cycle

AC 

Mains 

Power 

Draw 

(W)

Current Draw 

(Amps)

Thermal 

Dissipation

AC 

Mains 

Power 

Draw 

(W)

Current Draw 

(Amps)

Thermal

Dissipation

AC 

Mains 

Power 

Draw 

(W)

Current Draw 

(Amps)

Thermal

Dissipation

120V

230V

btu/hr

kcal/hr

120V

230V

btu/hr

kcal/hr

120V

230V

btu/hr

kcal/hr

50%

1119

14.3

7.5

1773

447

759

9.7

5.1

1225

309

40%

903

11.6

6.0

1444

364

615

7.9

4.1

1006

254

30%

687

8.8

4.6

1116

281

471

6.0

3.1

787

198

20%

471

6.0

3.1

787

198

326

4.2

2.2

568

143

10%

254

3.3

1.7

459

116

182

2.3

1.2

349

88

04/03                                                            135178-1  

 

For more details refer to the applicable Operation Manual or 
contact Crown Factory Service. The provided data should not be 
construed as specifi cations.
Crown is a registered trademark of Crown International, Inc. 
Printed in U.S.A.

© 2003 Crown Audio, Inc.

This document provides detailed information about the amount of power 
and current drawn from the AC mains by the Crown

®

 Xs 4300 amplifi er and 

the amount of heat produced under various conditions. The calculations 
presented here are intended to provide a realistic and reliable depiction 
of the amplifiers. The following assumptions or approximations were 
made:

• The amplifi er’s available channels are loaded, and full power is being    

delivered.

•  Effi ciency at standard 1 kHz power into 4 ohms is 55.5%.

•  Quiescent power draw is 38.1 W. 

• 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 quiescent power draw of 90 watts is a maximum value and includes 
power drawn by the fan. The following equation converts power draw in 
watts to current draw in amperes:

The value used for Power Factor is 0.83. 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 ineffi ciency is 0.35 (1.00–0.65). 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: