Specifications

20
eldI rewoP8/1 )esionknip( rewoP3/1 )esionknip( rewoPlluF )enis(
daoL rh/UTB rh/lack rh/UTB rh/lack rh/UTB rh/lack rh/UTB rh/lack
203XC
8Ω 8+ Ω 00205
565 541027081517081
4Ω 4+ Ω 00205
599 05254215135921523
2Ω 2+ Ω 00205
0471 04455220755242016
205XC
8Ω 8+ Ω 56104
019 03203115820901572
4Ω 4+ Ω 56104
0751 59354910945781574
2Ω 2+ Ω 56104
0652 54607435785853509
207XC
8Ω 8+ Ω 00205
097 00208015725421513
4Ω 4+ Ω 00205
0131 03301910840232585
2Ω 2+ Ω 00205
5522 075091350801640611
209XC
8Ω 8+ Ω 02255
009 52251415535071034
4Ω 4+ Ω 02255
5251 58306525460703577
2Ω 2+ Ω 02255
5032 0855624570153850741
2011XC
8Ω 8+ Ω 52275
5911 00306715440502515
4Ω 4+ Ω 52275
5312 04553320955573549
2Ω 2+ Ω 52275
5793 0001
V203XC
V07+V0700205
5211 58259215230801072
V206XC
V07+V0756104
5871 05406220755502025
V2021XC
V07+V0700205
5712 055506255603245601
Thermal losses (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 power the loudspeakers. Power that enters the amplifier through
the AC cord, less that which exits through the speaker outputs, is lost and turns into heat, called thermal loss .
The amplifier must remove the heat to the outside surrounding space to prevent overheating. The amount of
heat loss will depend on the amp model, the power level at which it is operated, and its load impedances.
The table of thermal loss specifications below will allow you to predict the heat produced by an amplifier system
under various conditions and then specify adequate room cooling (e.g., air conditioning) to compensate. Use one-
eighth power (the highlighted column) for normal, continuous usage. CX Series amplifiers are fan cooled, with
rear-to-front air flow to avoid heat buildup in the equipment rack. They are designed to produce continuous 1/
8 average power or better into the heaviest loads shown, in ambient temperatures of 35º C (95º F).
THERMAL LOSS NOTES
• “Idle” represents amplifier operation with signal levels 40 dB below full power or lower. Thermal losses in standby mode are less than
17 Btu/hr (4.3 kcal/hr).
• 1/8 power with pink noise represents typical program with occasional clipping, or the approximate highest output level before
clipping becomes audible. Use this rating for most operation.
• 1/3 power with pink noise represents severe program with heavy clipping. This is an absolute worst case scenario, and approximates
music played at absolute maximum level just short of total obliteration by clipping. This might be encountered in dance clubs and
other scenarios where impact is more important than fidelity of sound. To avoid overheating, do not use load impedances lower than
4 ohms per channel (non-”V” models) or lines loaded at higher than 50% of the amp rating (“V” models).
• Full power measurements are with a continuous sine wave at 1% clipping. This would be encountered only in bench testing or driving
a continuous signal such as a siren. In normal operation, full-power peaks are usually brief and rarely more than a 25%duty cycle.
Continuous full-power operation is generally possible at the lightest loading (8 ohms per channel for non-”V” models; 50% loading
for “V” models). This rating shows peak AC consumption and performance in unusual applications.
• Thermal or overcurrent cutback limits duration of full-power operation at heaviest load (2Ω or 100% load) after several seconds, and
at half load (4Ω or 50% load) after several minutes.