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