CSL Series Power Amplifiers
Page 15
Maximum Power Specifications
Crown’s maximum power specifications represent the largest amount of output power you can expect from your amplifier when it is
driven to full output under the given conditions. These specifications can be used to prevent loudspeaker and hearing damage.
The maximum power matrices include specifications for single cycle and 40 millisecond burst sine waves. Burst signals act like large
transient peaks that are present in common source signals. Loudspeakers can respond to a single cycle burst, so the single cycle burst
specifications should be used to help you protect your loudspeakers. In contrast, a 40 millisecond burst represents the typical
response time of the human ear. Your ear will not respond to the entire dynamic change of a burst that lasts less than 40 milliseconds.
Our maximum power specifications are referenced to a distortion level of 0.05%. The distortion reference for this measurement is not
limited to THD, but includes all types of distortion and noise. The distortion level of 0.05% is used because this represents a low
distortion condition. To help you operate your amplifier within these tolerances, Crown’s premium amplifiers include an input/output
comparator that shows when the amplifier has exceeded 0.05% distortion. Operating the amplifier at distortion levels above 0.05% can
result in output power levels that are higher than those listed in the maximum power matrices.
Maximum Power Notes:
All maximum power specifications are based on 0.5% regulated AC mains with THD of less than 1.0% and an ambient room temperature of 70° F (21° C).
International units with multi-tap transformers are specified for the best-case transformer tap (normally 240 VAC, 60 Hz). Although it is an unusual condi-
tion, your amplifier can function well with AC mains voltages up to 10% over the specified line voltage. With overvoltage conditions, your amplifier may be
capable of delivering instantaneous power levels up to 20% greater than the specifications in the matrix.
1. A single cycle sine wave is presented to the amplifier and monitored for nonlinear distortion. The average power during the burst is reported. Loud-
speakers must be able to withstand this level if they are to be safely used with this amplifier.
2. A 40 millisecond sine wave burst (10 percent duty cycle) is presented to the amplifier and monitored for nonlinear distortion. The average power
during the burst is reported. This power level is a measurement of the amplifier’s maximum transient power that can be perceived by the human ear.
Fig. 4.4 460 CSL Maximum Power Matrix
8
460 CSL –
Maximum Power (Watts)
Stereo/Mono
Mode
Bridge-Mono
(balanced output)
Parallel-Mono
16
4
Single Cycle Tone Burst
Load (Ohms)
AC Mains
120 VAC, 6 0 Hz Units
0.05% Dist Noise
(See note 1)
50 Hz
325
265
630
540
635
530
4
2
8
8
16
4
325
290
640
580
620
580
1 kHz
335
310
640
630
645
615
330
345
650
690
625
690
7 kHz
335
300
620
610
640
600
330
335
670
670
625
670
4
2
8
International Units
Bridge-Mono
(balanced output)
Parallel-Mono
40 Millisecond Tone Burst
50 Hz
0.05% Dist Noise
(See note 2)
315
230
600
470
620
465
1 kHz
295
220
565
440
580
430
320
260
635
520
615
515
315
235
625
470
615
475
7 kHz
310
230
580
455
605
450
330
250
655
495
625
490
Stereo
(both channels
driven)
Stereo
(both channels
driven)
