9
Troubleshooting
Most difficulties in audio systems are the result of poor or wrong connections,
or improper control settings. If you encounter problems, isolate the area
of the difficulty, check the control settings, determine the cause of the fault
and make the necessary changes. If you are unable to get sound from the
RB-1581, refer to the suggestions for the following conditions:
Power Indicator Is Not Illuminated
No main power to the RB-1581. Check AC power connections at the
amplifier and the AC outlet. Check the front panel power switch. Make
sure that it is set to the ON position.
Fuse Replacement
7
If everything checks out correctly and you still cannot get the amplifier to turn
on, check for a blown fuse. Disconnect the AC from the wall and remove
the fuse holder
7
on the back panel. If the fuse is blown, replace with a
new fuse and try again.
Note:
Make sure that the power cord is disconnected from the wall before
checking or replacing the fuse. Replace only with the identical size and type
fuse (3AG 125V 12A for U.S. version or 5ST6.3 for European version).
No Sound
If the amp is getting AC power, but is producing no sound, check the
PROTECTION INDICATOR on the front panel. If lit, see below. If not, check
all of your connections and control settings on associated components.
Protection Indicator Is Illuminated
The front panel PROTECTION INDICATOR lights when the RB-1581
protection circuits have shut off the amplifier. Typically, this occurs only
when the ventilation openings are blocked, when there is faulty speaker
wiring, or after a period of extreme use. Turn off the system and wait for
the amp to cool. Then push the front panel power switch in and out to reset
the protection devices. If the problem is not corrected or reoccurs, there is
a problem with the system or the amplifier itself.
Specifications
Continuous Power Output
Continuous Power Output
500 watts
(20-20k Hz, <0.09%, 8 ohms)
Total Harmonic Distortion
Total Harmonic Distortion
(20Hz - 20kHz, 8 ohms)
<
0.03%
Intermodulation Distortion
Intermodulation Distortion
(60Hz:7kHz, 4:1)
<
0.03%
Damping Factor
Damping Factor
(20Hz-20kHz, 8ohms)
800
Input Impedance/Sensitivity
Input Impedance/Sensitivity
Unbalanced
12k ohms/ 1.6 volts
Balanced
100k ohms/ 2.5 volts
Amplifier Gain
Amplifier Gain
Unbalanced
32
dB
Balanced
28 dB
Frequency Response
Frequency Response
(
μ
1db)
10 Hz - 100k Hz
Speaker Impedance
Speaker Impedance
4 ohms minimum
Power Requirements
Power Requirements
USA:
120 volts, 60 Hz
Europe:
230 volts, 50 Hz
Power Consumption
Power Consumption
550 watts
Dimensions
Dimensions
(W x H x D)
431 x 144 x 407 mm
17
x
5
7
/
8
x 16
ins
Front Panel Height
Front Panel Height
3U/132.6mm/5
1
/
4
ins
Weight
Weight
(net)
17.1 kgs, 37.62 lbs
All specifications are accurate at the time of printing.
Rotel reserves the right to make improvements without notice.
Rotel and the Rotel HiFi logo are registered trademarks of The Rotel Co., Ltd.,Tokyo, Japan.
