Crown D Series Operation Manual page 16

6 Specifications
Configuration and Load
(ohms)
Dual
(both channels
driven)
Bridge-Mono
(balanced output
)
Configuration and Load
(ohms)
Dual
(both channels
driven)
Bridge-Mono
(balanced output
)
Notes:
All power matrix specifications are based on a 0.1% regulated 120 VAC, 60 Hz power mains and an ambient room temperature of 70° F (21° C).
1. Continuous power in the context of Federal Trade Commission testing is understood to be a minimum of five minutes of operation. Harmonic distortion is measured at the RMS sum total as a percentage of the fundamental output voltage. This applies for
all wattages greater than 0.25 watts.
2. A 1 kHz sine wave is presented to the amplifier and the output monitored for nonlinear distortion. The level is increased until the THD reaches 0.1%. At this level the average power per channel is reported.
3. A single cycle sine wave is presented to the amplifier and monitored for nonlinear distortion. The average power during the burst is reported. Loudspeakers must be able to withstand this level if they are to be safely used with this amplifier.
4. A 40 millisecond burst or a two cycle sine wave (whichever is of greater duration) is used and the power computed as the average power during the burst. The duty cycle of this test is 10 percent. This power level is a measure of how loud an amplifier is
as perceived by the human ear.
5. EIA standard RS-490 (both channels driven).
page 16
Max. Aver-
FTC Continuous age Power at
Average Power at 0.1% THD 0.1% THD
(See note 1) (See note 2)
20Hz-20kHz 1 kHz 1 kHz
4 35
8 20 25 25
16 20 20 20
8 70
16 40 50 50
Figure 6.1 D-45 Power Matrix
Max. Aver-
FTC Continuous age Power at
Average Power at 0.1% THD 0.1% THD
(See note 1) (See note 2)
20Hz-20kHz 1 kHz 1 kHz
4 45 50 55
8 35 40 40
16 25 25 25
8 95 105 110
16 70 75 80
Figure 6.2 D-75A Power Matrix
D-45
Single-Cycle Tone Burst
Watts at < 0.05% THD
(See note 3)
20 Hz 50 Hz 1 kHz 20 Hz
40 50 75 55
25 30 35 40
20 20 20 20
85 105 145 85
50 60 70 50
D-75A
Single-Cycle Tone Burst
Watts at < 0.05% THD
(See note 3)
20 Hz 50 Hz 1 kHz 20 Hz
65 85 120 65
45 50 60 45
25 30 30 25
140 165 235 140
90 100 130 90
D Series Power Amplifiers
40 mS Tone Burst EIA Watts at
Watts at < 0.05% THD 1% THD
(See note 4) (See note 5)
50 Hz 1 kHz 1 kHz
60 60 35
40 40 25
20 20 20
85 85 70
50 55 50
40 mS Tone Burst EIA Watts at
Watts at < 0.05% THD 1% THD
(See note 4) (See note 5)
50 Hz 1 kHz 1 kHz
70 70 55
45 45 40
25 25 25
140 140 105
90 95 75
Operation Manual