8

RMB-1085 Five-Channel Power Amplifier

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 RMB-1085,
refer to the suggestions for the following
conditions:

Front Panel Power Indicator Is

Not Lit

No mains power to the RMB-1085. Check AC
power connections at the amplifier and the AC
outlet. Check the front panel power switch.
>iÊÃÕÀiÊÌ>ÌÊÌÊÃÊÃiÌÊÌÊÌiÊ" Ê«ÃÌ°Ê
If using 12V trigger power-on, make sure
that a trigger signal is present at rear panel
screw terminals.

No Sound

If the amp is getting AC power, but is producing
ÊÃÕ`]ÊViVÊÌiÊ*,"//" Ê /",Ê
on the front panel. If lit, see below. If not, check
all of your connections and control settings on
associated components. Make sure that your
input connections and speaker connections
match your selected configuration.

Protection Indicator Is Lit

/iÊvÀÌÊ«>iÊ*,"//" Ê/",Ê
is lit when the RMB-1085 protection circuits
have shut off the amplifier. Typically, this oc-
curs only when the amplifier has overheated,
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

Power Configuration 5 x 100 watts
Watts/Channel all channels driven, with 20kHz filter
8 ohm load, 20Hz to 20kHz, <0.02% THD 100 watts
4 ohm load, 1kHz, <1% THD 180 watts
Peak Output Current 11 amps
Total Harmonic Distortion
At rated power, 20Hz-20kHz < 0.02%
At one-half rated power, 20Hz-20kHz < 0.03%
At 1 watt per channel, 20Hz-20kHz < 0.03%
Intermodulation Distortion at rated power, 60Hz:7 kHz, 4:1 < 0.03%
Damping Factor 8 ohms 200
Amplifier Gain 27.2dB
Input Sensitivity/Impedance 1.25V/8.2 kohms
Frequency Response ±3dB 10Hz–40kHz
Signal to Noise Ratio IHF A network 105dB
Power Requirements 110-240 volts
Power Consumption 250 watts
Idling Power Consumption 30 watts
Standby Power Consumption 6 watts
Dimensions (W x H x D) 432 x 72 x 382 mm
17 1/8 x 9 3/8 x 15 1/8 in
Front Panel Height (for rack mount) 60mm
Weight (net) 5.4 kg, 11.9 lb.
All specifications are accurate at the time of printing.
Rotel reserves the right to make improvements without notice.