QSC CXD Serie Mode D'emploi page 29

Heat Loss Charts
Heat losses are the thermal emissions from an amplifier while it is operating. It comes from dissipated waste power—i.e., real AC power in minus audio
power out. Measurements are provided for various loads at idle, 1/8 of average full power, 1/3 of average full power, and full power, with all channels
driven simultaneously. For typical usage, use the idle and 1/8 power figures. This data is measured from representative samples; due to production
tolerances, actual heat emissions may vary slightly from one unit to another. Bridged mono into 8 ohms is equivalent to 4 ohms per channel; into 4
ohms is equivalent to 2 ohms per channel.
BTU/hr
Idle
CXD 4.3 225
CXD 4.5 286
Load per Channel
BTU/hr
1/8th Power
CXD 4.3 684
CXD 4.5 811
1/3rd Power
CXD 4.3 983
CXD 4.5 881
Full Power
CXD 4.3 2498
CXD 4.5 3116
Idle
Thermal loss at idle or with very low signal level.
1/8 Power
Thermal loss at 1/8 of full power is measured with pink noise. It approximates operating with music or voice with light clipping and represents the
amplifier's typical "clean" maximum level, without audible clipping. Use these figures for typical maximum level operation.
1/3 Power
Thermal loss at 1/3 of full power is measured with pink noise. It approximates operating with music or voice with very heavy clipping and a very
compressed dynamic range.
Full Power
Thermal loss at full power is measured with a 1 kHz sine wave. However, it does not represent any real-world operating condition.
All manuals and user guides at all-guides.com
kcal/hr
57
72
8Ω 4Ω
kcal/hr BTU/hr
172 794
204 1144
248 1261
222 1708
629 2925
785 5318
2Ω
kcal/hr BTU/hr kcal/hr
200 1040
288 1124
318 1869
430 1737
737 4198 1058
1340 4208 1060
29
25V-70V-100V
BTU/hr kcal/hr
262 794 200
283 1144 288
471 1261 318
438 1708 430
2925 737
5318 1340
TD-000367-00-A
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