Heat Emissions - QSC CX Series User Manual

HEAT EMISSIONS

Essentially, a power amplifier draws electrical energy from the AC mains, converts it to DC, and then converts
it again into an analog of the input signal to send out to the loudspeakers. Any AC power that enters the amplifier
through the power cord and does not exit through the speaker outputs turns into heat, which the amplifier must
rid itself of by exhausting it to the outside. In indoor use this may present a sizeable challenge to a building's
air conditioning system. Use the table below to predict the heat that will be emitted by your amplifier.
Model Channel Load BTU/hr kcal/hr
CX4, CX4T 8 + 8
4 + 4
2 + 2
70V + 70V
CX6, CX6T 8 + 8
4 + 4
2 + 2
70V + 70V
CX12, CX12T 8 + 8
4 + 4
2 + 2
70V + 70V
Heat emissions of CX
amplifiers under various
conditions
14
Full Power 1/3 Power
BTU/hr kcal/hr
645 163 615
1265 318 1060
2340 590 1700
1365 344 1050
1406 354 1020
2525 637 1617
4658 1174 2532
2010 507 1503
1791 452 1239
3330 840 2081
5698 1437 3146
3772 951 2338
1/8 Power
BTU/hr kcal/hr
155 510 128
267 830 210
429 1295 326
264 800 202
257 604 152
408 921 232
638 1290 325
379 1141 288
312 805 203
525 1222 308
793 1611 406
589 1280 323
Idle
BTU/hr kcal/hr
85 22
85 22
85 22
85 22
229 58
229 58
229 58
229 58
297 75
297 75
297 75
297 75