Lab.gruppen FP 2200 User Manual page 11

MAX OUTPUT POWER
fP 2200 8 ohms
4 ohms
2 ohms
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.
Table 1
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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 650 watts per channel. The 1/3 power per channel is accordingly 650 / 3 = 217 watts, and
total output 2 x 217 = 433 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:
1120 - 433 = 687 watts per amplifier.
The chart below shows the heat power produced in watts, in kcal per hour, and also in BTU per hour.
fP 2200 8 ohms
4 ohms
2 ohms
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.
The efficiency can also be calculated, it being the output-power divided by the input-power:
433 watts / 1120 watts= 39%.
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The XLR input connectors are electronically balanced, and wired according to the IEC 268 (pin 2 =
"hot"), and wired in the following way:
PIN 1 GROUND/SHIELD
PIN 2 HOT (+)
PIN 3 COLD (-)
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Power
[W]
2x 350
2x 650
2x 1100
HEAT 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]
397 313
687 538
1242 910
= =
MAINS INPUT POWER
1/3 Power 1/8 Power
note 1 note 2
630 400
1120 700
1975 1185
kcal / h kcal / h
340 270
590 460
1070 780
= ======================
Idle
110
110
110
BTU / h BTU / h
1350 1070
2340 1840
4240 3110
NM
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