Lab.gruppen fP 2400Q - Manual (Page 13)

Power 1/3 Power 1/8 Power Idle
[W] note 1 note 2
fP 2400Q 8 ohms 4x 360 1140 820 175
4 ohms* 4x 380 1325 840 175
2 ohms* 4x 500 2125 1440 175
* MLS at -3dB
note 1 Average power with music as program source. The amplifier driven to clip level.
note 2 Normal music power with 9dB headroom, IEC standard power rating.
MAINS INPUT POWER MAX OUTPUT POWER
Table 2
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The heat power can be calculated as in the following example:
We consider a headroom of at least 5dB (1/3 of full power) and a 4 ohms load on an amplifier
producing 380 watts per channel. The 1/3 power per channel is accordingly 380 / 3 = 127 watts, and
total output 4 x 127 = 507 watts.
The power consumption according to the chart above is then 1330 watts. This chart shows the active
power consumption of the amplifier with different loads and power levels.
The heat power produced is the difference between the power consumption and output power:
1325 – 507 = 818 watts per amplifier.
The chart below shows the heat power produced in watts, in kcal per hour, and also in BTU per hour.
he efficiency can also be calculated, it being the output-power divided by the input-power:
1/3 Power(1) 1/8 Power (2) 1/3 Power(1) 1/8 Power (2) 1/3 Power(1) 1/8 Power (2)
[W] [W] kcal / h kcal / h BTU / h BTU / h
fP 2400Q 8 ohms 660 640 570 550 2250 2180
4 ohms 818 650 700 560 2790 2220
2 ohms 1458 1190 1250 1020 4980 4060
note 1 Average power with music as program source. The amplifier driven to clip level.
note 2 Normal music power with 9dB headroom, IEC standard power rating.
HEAT POWER
T
507 watts / 1325 watts= 38%.
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tive balanced and wired according to the IEC 268, that is pin 2 hot, and wired
IN 1 GROUND/SHIELD
XLR Input connectors are ac
in the following way:
P
PIN 2
HOT (+)
PIN 3 COLD (-)
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