Configuration and load (ohms), Max. average power at 0.1% thd (see note 2), 40 ms tone burst watts at < 0.05% thd (see note 4) – Crown Audio D-75A User Manual
Page 16: Eia watts at 1% thd (see note 5), 20hz-20khz, 1 khz, 20 hz, 50 hz, Dual (both channels driven), Bridge-mono (balanced output)
D Series Power Amplifiers
page 16
Operation Manual
D-45
Configuration and Load
(ohms)
FTC Continuous
Average Power at 0.1% THD
(See note 1)
Max. Aver-
age Power at
0.1% THD
(See note 2)
Single-Cycle Tone Burst
Watts at < 0.05% THD
(See note 3)
40 mS Tone Burst
Watts at < 0.05% THD
(See note 4)
EIA Watts at
1% THD
(See note 5)
20Hz-20kHz
1 kHz
1 kHz
20 Hz
50 Hz
1 kHz
20 Hz
50 Hz
1 kHz
1 kHz
Dual
(both channels
driven)
4
35
40
50
75
55
60
60
35
8
20
25
25
25
30
35
40
40
40
25
16
20
20
20
20
20
20
20
20
20
20
Bridge-Mono
(balanced output
)
8
70
85
105
145
85
85
85
70
16
40
50
50
50
60
70
50
50
55
50
6 Specifications
D-75A
Configuration and Load
(ohms)
FTC Continuous
Average Power at 0.1% THD
(See note 1)
Max. Aver-
age Power at
0.1% THD
(See note 2)
Single-Cycle Tone Burst
Watts at < 0.05% THD
(See note 3)
40 mS Tone Burst
Watts at < 0.05% THD
(See note 4)
EIA Watts at
1% THD
(See note 5)
20Hz-20kHz
1 kHz
1 kHz
20 Hz
50 Hz
1 kHz
20 Hz
50 Hz
1 kHz
1 kHz
Dual
(both channels
driven)
4
45
50
55
65
85
120
65
70
70
55
8
35
40
40
45
50
60
45
45
45
40
16
25
25
25
25
30
30
25
25
25
25
Bridge-Mono
(balanced output
)
8
95
105
110
140
165
235
140
140
140
105
16
70
75
80
90
100
130
90
90
95
75
Figure 6.1 D-45 Power Matrix
Figure 6.2 D-75A Power Matrix
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).