Operation; Hum And Noise; Protection Circuit; Specifications - Rotel RB-890 Owner's Manual

SWITCH AND INDICATORS
(1) Power Button
Press the upper part of this button to turn on the
power in the unit. Press the lower part to cut off
the power.
(2) Power Indicator
Glows when power is turned on with the power
button.
(3) Protection Indicator
The indicator normally lights for several seconds
upon turning on the power. When the indicator
goes off, it means the unit is in the normal
operating state.
The indicator glows when abnormally high tem¬
perature is built up inside the unit. In such a case,
the indicator will remain on until the temperature
inside the unit drops to a normal level. When the
indicator goes offT it indicates the unit has
returned to the normal operating state.
OPERATION
• Before commencing operation, check to
see if all connections are properly made.
• Before turning on the power in the unit,
always be sure to turn down the preamplifier
volume control to minimum.
1. Turn on the preamplifier.
2. Turn on the RB-890.
3. Reproduce a desired source, and raise the
volume level on the preamplifier.
HUM AND NOISE
In any high fidelity installation, hum may be
caused by the interconnection of a turntable,
tuner and amplifier, and speakers as the result
of wiring, different grounding or locations of
components.
If hum is experienced with your unit, disconnect
everything but the speakers from the unit. Plug
in the turntable and if hum or howling appears,
move the turntable away from the speakers as
much as possible.
Note hum may also be induced by defective
cable connections or by running the cables too
close to strong AC field.
When your unit picks up noise during the recep¬
tion of broadcasts, causes are mostly due to ex¬
ternal objects such as fluorescent lamps and
house appliances using motor or thermostat, or
others that may induce the noise.
Either relocating the unit away from the noise
sources or using an improved outdoor antenna
may readily solve the problem.
In the event you cannot find the cause, consult
your dealer or a qualified electrician.
PROTECTION CIRCUIT
The RB-890 incorporates thermal protector to
prevent accident or damage. If for some reason
the protection circuit is activated, there will be a
sudden cut-off of sound from the speakers, and
the protection indicator will light up.
If no sound is produced, the reason may be due
to the functioning of the protection circuit. First,
turn off the power and disconnect the plug from
the electrical outlet. Then locate and remedy the
cause of the trouble. When the thermal protec¬
tor is activated, the unit will start functioning au¬
tomatically after the temperature is lowered
again.
If the protection circuit is activated again despite
taking the above action, cut off the power sup¬
ply from your entire audio system and consult
your dealer or a qualified electrician.
Note: The protection circuit will normally oper¬
ate to prevent a popping noise from being gener¬
ated upon turning on the power. No sound is
produced for several seconds after turn-on
VOLTAGE SELECTION
Not available for U.K., Canada and Scandinavia
The unit is a variable voltage equipment that can
run on 120V, 220V or 240V power supply. Your
unit should already be preset at the proper
voltage for use in your area. However, if you
move to an area where the power supply voltage
is different, consult your dealer.
SPECIFICATIONS
Continuous Power Output 160 watts* per channel, min. RMS both
channels driven into 8 ohms from 20 to
20,000 Hz with no more than 0.03%
total harmonic distortion.
Rated power output (BTL connection)....
360Watts(mono) min.RMS driven into
8 ohms from 20 to 20,000 Hz with no
more than 0.03% total harmonic
distortion
DIN Power Output 280 watts per channel (1 kHz, 4 ohms,
1% THD)
Total Harmonic Distortion No more than 0.03% (continuous rated
(20 to 20,000 Hz) power output)
No more than 0.03% (continuous 1/2
rated power output)
No more than 0.03% (1 watt per channel
power output, 8 ohms)
Intermodulation Distortion.No more than 0.03% (continuous rated
(60 Hz : 7 kHz = 4:1) power output)
No more than 0.03% (continuous 1/2
rated power output)
No more than 0.03% (1 watt per channel
power output, 8 ohms)
Output: Speaker 4-16 ohms
Damping Factor 380 (20 to 20.000 Hz, 8 ohms)
Input Sensitivity/Impedance.1.0V/22 kohms
Frequency Response .15 to 130,000 Hz, + 0 dB, -1.0 dB
Signal-to-Noise Ratio
(IHF, A network).120 dB
Power Requirement.120V/60 Hz, 220V/50 Hz, 240V/50 Hz, or
120, 220, 240V/50-60 Hz
(depending on destinations)
Power Consumption 800 watts
Dimensions (overall) 430 (W) x 109 (H) x 349 (D) mm
16-15/16" x 4-11/16" x 16-15/16"
Weight (net) .13.0 kg/28.7 lbs.
• Specifications and design subject to possible modification without notice.
• * Measured pursuant to the Federal Trade Commission's Trade Regulation
Rule on Power Claims for Amplifiers (applicable to the U S A only). 4