Cooling Fans; Current/Power Draw And Thermal Dissipation - D&B D80 Manual

230 V A C / 50 Hz / 0.5 Ω Source impedance
Mode/Level Load
POWER switch off
Standby
On, idling
Signal CF 12 dB cont. 4 Ω/Ch.
Signal CF 9 dB cont. 4 Ω/Ch.
Signal CF 9 dB max. 4 Ω/Ch.
208 V A C / 60 Hz / 0.5 Ω Source impedance
Mode/Level Load
POWER switch off
Standby
On, idling
Signal CF 12 dB cont. 4 Ω/Ch.
Signal CF 9 dB cont. 4 Ω/Ch.
Signal CF 9 dB max. 4 Ω/Ch.
68
Line
current
Power
A
factor
RMS
– 0.14 0.08
– 0.18 0.26
– 0.85 0.83
12.50 0.98
18.00 0.98
24.00 0.98
Line
current
Power
A
factor
RMS
– 0.13 0.08
— 0.18 0.25
– 0.93 0.82
13.80 0.98
18.00 0.98
27.00 0.98

12.3. Cooling fans

Three temperature and level controlled fans are incorporated for
cooling the internal components, which allows greater cooling
during louder program material. The fan speed is consequently
reduced during quieter passages preventing background noise
interference. If the unit heats up a «Temp. Warning» is issued and
the fans will give full cooling power permanently.

12.4. Current/power draw and thermal dissipation

Measurement references
Signal CF 12 dB: Represents 1/8th of the nominal power.
Signal CF 9 dB: Represents 1/4th of the nominal power; power
is limited to the nominal line current.
Continuous (cont.): Unlimited time. Thermal conditions may
affect power figures.
Maximum (max.): Values are measured 1 sec. after signal was
applied.
Input Output Power
power power loss
W (sum.) W W
2 0
10 0
162 0 162
2780 2150 630
4140 3136 1004
5500 4000 1500
Input Output Power
power power loss
W (sum.) W W
2 0
10 0
160 0 160
2822 2150 672
3635 2800 835
5600 4000 1600
Thermal Thermal
dissipation dissipation
BTU/hr kCal/hr
2 7
10 34
553
2150
3426
–
Thermal Thermal
dissipation dissipation
BTU/hr kCal/hr
2 7
10 34
546
2293
2849
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