Troubleshooting; Front Panel Power Indicator Is Not Lit; No Sound; Protection Indicator Is Lit - Rotel RMB-1048 Owner's Manual

RMB-1048 Eight Channel Power Amplifier

Troubleshooting

Most difficulties in audio systems are the re-
sult 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 RMB-1048, re-
fer to the suggestions for the following con-
ditions:
Front Panel Power Indicator Is
Not Lit
No main power to the RMB-1048. 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. If
using signal sensing auto power-on, make sure
that a signal is present at the inputs. If using
12V trigger power-on, make sure that a trig-
ger signal is present at rear panel screw ter-
minals.

No Sound

If the amp is getting AC power, but is producing
no sound, check the PROTECTION INDICA-
TORS on the front panel. If lit, see below. If
not, check all of your connections and con-
trol settings on associated components. Make
sure that your input connections and speaker
connections match your selected stereo/mono
configuration.

Protection Indicator Is Lit

The front panel PROTECTION INDICATORS
light when the RMB-1048 protection circuits
have shut off the amplifier. Typically, this oc-
curs 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 - all channel driven
(20-20 kHz, < 0.05% THD)
Total Harmonic Distortion
(20Hz-20kHz, 8 ohms)
Intermodulation Distortion
(60 Hz : 7 kHz, 4:1)
Frequency Response (± 1 dB)
Damping Factor (20-20,000 Hz, 8 ohms)
Speaker Impedance
Signal to Noise Ratio (IHF A network)
Input Impedance
Input Sensitivity
Power Requirements
USA:
Europe:
Power Consumption
Dimensions (W x H x D)
Panel Height
Weight (net)
All specifications are accurate at the time of printing.
Rotel reserves the right to make improvements without notice.
8
40 watts/ch into 8 ohms
< 0.05%
< 0.03%
15Hz–100kHz
150
4 ohms minimum
110 dB
22 k ohms
1.0 volt
115 Volts, 60 Hz
230 Volts, 50 Hz
400 Watts
432 x 121 x 432 mm
17 x 4
109 mm, 4
15.1 kg, 33.3 lb.
3 / x 17 in
4
9 / in
32