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MAINS OPERATION & RESULTING TEMPERATURE
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 amplier 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 amplier
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 (P
D
). 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 “P
D
” lists the leakage power in relation to different operational states. The column “BTU/hr”
shows the dispensed heat amount per hour.
PA2450L U
mains
[V]
I
mains
[A]
P
mains
[W]
P
out
[W]
P
D
[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 U
mains
[V]
I
mains
[A]
P
mains
[W]
P
out
[W]
P
D
[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)
P
D
= Power dissipation
The following factors allow direct proportional calculation of the mains current (I
mains)
for different mains
supply voltages: 100V = 2,3; 120V = 1,9; 220V = 1,05; 240V = 0,96
9