Lab.gruppen fP Series FP 2200 User Manual - T= `lkkb`qflkp=
MAX OUTPUT POWER
MAINS INPUT POWER
Power
1/3 Power
1/8 Power
Idle
[W]
note 1
note 2
fP 2200
8 ohms
2x
350
630
400
110
4 ohms
2x
650
1120
700
110
2 ohms
2x
1100
1975
1185
110
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.
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 2200
8 ohms
397
313
340
270
1350
1070
4 ohms
687
538
590
460
2340
1840
2 ohms
1242
910
1070
780
4240
3110
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
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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