Crown Audio CSL 1400 - Manual (Page 15)

1400 CSL Power Amplifier
Page 16 Reference Manual
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.
The burst power specifications are provided at 0.05% THD which is a practical low distortion condition. Operating the amplifier at levels
higher than 0.05% THD 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
condition, 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. 4.2 1400 CSL Maximum Power Matrix
8
1400 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% Distortion
(See note 1)
50 Hz
1,090
715
2,155
1,415
2,140
1,420
4
2
8
8
16
4
1,190
785
2,355
1,540
2,330
1,570
1 kHz
1,575
870
3,140
1,740
3,135
1,735
1,750
960
3,490
1,915
3,485
1,895
7 kHz
1,525
835
3,040
1,675
3,015
1,665
1,695
920
3,380
1,840
3,345
1,825
4
2
8
International Units
Bridge-Mono
(balanced output)
Parallel-Mono
40 Millisecond Tone Burst
50 Hz
0.05% Distortion
(See note 2)
910
610
1,780
1,250
1,790
1,225
1 kHz
815
570
1,615
1,135
1,605
1,135
970
675
1,945
1,360
1,940
1,360
870
625
1,725
1,235
1,720
1,235
7 kHz
855
595
1,690
1,180
1,680
1,170
920
645
1,805
1,285
1,800
1,270
Stereo
(both channels
driven)
Stereo
(both channels
driven)