Electro-Voice PA2250T User Manual

Mains Operation
The following tables provide a useful aid in determining power supply and cabling requirements. Column 

“1/8 max. output power into 4 ohms

(2)

” states the values to be used for normal operation. These results 

were measured with the power amplifier being operated at maximum output and a Pink Noise signal 

according to EN60065 applied at the input, which approximately represents the strain of an audio signal 

driving the power amp at maximum modulation.

Temperatures inside of the power amplifier
The  power  drawn  from  the  mains  network  is  converted  into  acoustic  output  to  feed  the  connected 

loudspeaker systems plus heat. The difference between drawn power and dispensed power is referred 

to as leakage power or dissipation (PD). The amount of heat resulting from power dissipation might 

remain inside of a rack-shelf and needs to be diverted using appropriate measures. The following table 

is meant as auxiliary means for calculating temperatures inside of a rack-shelf system/cabinet and the 

ventilation efforts necessary.

The column “PD” lists the leakage power in relation to different operational states. The column “BTU/hr” 

shows the dispensed heat amount per hour.

PA2450L

Umains

[V]

Imains

[A]

Pmains

[W]

Pout

[W]

PD

[W]

BTU/

hr

(3)

idle

230

0,2

28

0

28

96

Max. output power into 8ohms

(1)

230

5,4

923

2x300

323

1102

Max. output power into 4ohms

(1)

230

8,8

1605

2x480

645

2201

1/3 max. output power into 4ohms

(1)

230

5,6

953

2x160

633

2160

1/8 max. output power into 4ohms

(1)

230

3,7

598

2x60

478

1631

1/8 max. output power into 4ohms

(2)

230

3,2

530

2x60

410

1399

1/8 max. output power into 4ohms

(2)

 

(4)

253

3,6

629

2x73

484

1651

Normal Mode (-10dB) into 4ohms

(1)

230

3,2

550

2x48

454

1549

Rated output power (0dB, rated) into 4ohms

(1)

230

8,1

1482

2x450

582

1986

Alert-Mode (-3dB) into 4ohms

(1)

230

6,1

1065

2x225

615

2098

PA4150L

Umains

[V]

Imains

[A]

Pmains

[W]

Pout

[W]

PD

[W]

BTU/

hr

(3)

idle

230

0,4

54,7

0

55

187

Max. output power into 8ohms

(1)

230

3,9

653

4x100

253

863

Max. output power into 4ohms

(1)

230

6,3

1126

4x160

486

1658

1/3 max. output power into 4ohms

(1)

230

4,0

665

4x53

452

1541

1/8 max. output power into 4ohms

(1)

230

2,7

428

4x20

348

1187

1/8 max. output power into 4ohms

(2)

230

2,4

385

4x20

305

1041

1/8 max. output power into 4ohms

(2)

 

(4)

253

2,6

450

4x24

353

1205

Normal Mode (-10dB) into 4ohms

(1)

230

2,4

385

4x16

321

1095

Rated output power (0dB, rated) into 4ohms

(1)

230

6,1

1080

4x150

490

1638

Alert-Mode (-3dB) into 4ohms

(1)

230

4,6

790

4x75

490

1672

(1)

Sine wave 1kHz

(2)

Pink noise acc. to EN60065

(3)

1BTU = 1055.06J = 1055.06Ws

(4)

10% mains over voltage

(5)

PD = Power dissipation

The following factors allow direct proportional calculation of the mains current (

Imains)

 for different mains 

supply voltages: 100V = 2,3; 120V = 1,9; 220V = 1,05; 240V = 0,96

9