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Rotel RC-870 - User Manual

Rotel RC-870
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STEREO
CONTROL
AMPLIFIER
RC-870
INTRODUCTION
We
at
Rotel
want
to
thank
vou
for
purchasing
our
audk>
product.
Rotel
audio
products
are
designed
to
use
the
latest
electronic
technology,
and
they
incorpo¬
rate
our
long
experience
as
a
specialist
manufac¬
turer
of
audio
equipment.
We
are
confident
that
you
will
find
satisfaction
in
the
high
quality
sound
and
top
performance,
and
that
you
will
find
pleasure
in
the
functional
beauty
achieved
through
humarvengineerir>g
concept.
Before
starting
operation,
please
read
this
instruction
manual
thoroughly
and
acquaint
yourself
with
the
proper
mode
of
using
the
unit
and
all
its
connections.
We
hope
you
will
enjoy
top-notch
performance
for
many
years
to
come.
BEFORE
ENJOYMENT/
POWER
SUPPLY
Follow
the
instructions
below
for
maximum
safety:
1.
Use
a
wall
outlet
for
power
supply
Be
sure
to
connect
the
AC
tine
cord
to
a
house¬
hold
wall
outlet.
Be
certain
that
the
outlet
voltage
matches
the
electrical
rating
of
the
unit,
found
on
the
rear
panel
name
plate.
2.
Connecting
and
removirtg
AC
cord
Be
sure
to
connect
or
disconnect
the
AC
line
cord
only
after
turning
off
the
power
switch
to
prevent
possible
shock
noise
or
damage
to
the
speakers.
3.
Ventilate
the
unit
well
Never
block
any
ventilation
holes
at
the
top
and
bottom
of
the
unit.
Be
sure
also
to
provide
ample
ventilation
space
around
the
unit.
Poor
ventilation
may
result
in
damage
due
to
exces¬
sive
heat.
4.
Do
not
open
the
cabinet
In
order
to
avoid
electric
shock
or
damage
to
the
component,
never
open
the
cabinet.
If
a
foreign
object
falls
inside
the
unit
by
mistake,
turn
the
power
off.
disconnect
the
wall
plug,
and
consult
a
qualified
electrician
or
your
dealer.
5.
Irtttallation
Be
sure
to
place
the
unit
in
a
level
artd
flat
place
where
it
is
free
from
humidity,
vibration,
high
temperature
and
not
exposed
to
direct
sunlight.
Be
careful
not
to
place
the
unit
in
a
highly
enclosed
place
such
as
near
a
wall
or
on
a
bookshelf.
A
poor
ventilation
will
cause
unde¬
sirable
effects
to
the
unit.
6.
Moving
the
unit
When
transporting,
remove
the
AC
cord
from
the
wall
outlet
and
all
other
connected
cords
on
the
rear
panel
to
prevent
wire
breakage
arxi
short
circuits.
7.
If
the
unit
gets
wet
If
the
unit
should
get
wet,
immediately
discon¬
nect
the
AC
cord,
and
consult
your
dealer
or
a
qualified
electrician.
8.
Cleaning
and
maintenance
Do
not
use
chemicals
such
as
benzine
or
thin-
ners
on
the
front
panel.
Always
use
a
soft,
dry
cloth
to
clean
the
unit.
9.
O
wr>er's
manual
Keep
the
owner’s
manual
near
the
unit,
arxl
record
the
serial
number
(found
on
the
rear
panel)
on
the
cover.
Caution
(applicable
to
the
U.S.A.,
Canada,
Hong
Kong,
arxl
Southeast
Asia):
On
the
rear
panel
of
the
RC-870
are
two
sets
of
AC
outlet
through
which
power
is
supplied
to
audio
equipment
(turntable.
CD
player,
tuner,
cas¬
sette
deck,
etc.)
you
use
in
conjunction
with
the
RC-870.
Each
AC
outlet
is
the
switched
type,
turned
on
or
off
upon
switching
on
or
off
the
power
in
the
RC-870,
and
has
rating
of
200
watts
maximum.
Do
not
attempt
to
connect
equipment
whose
power
consumption
exceeds
the
rating
of
these
AC
outlets.
Never
connect
a
power
amplifier
to
these
AC
outlets.
CONNECTING
COMPONENTS
Connect
all
necessary
audio
components
to
the
rear
panel
of
the
unit,
using
RCA
pin
cords.
See
the
illustration
for
properly
completed
con¬
nections.
When
connecting
RCA
pm
cords,
be
sure
that
L
(left)
ar>d
R
(right)
markings
on
each
component
are
matched
correctly.
Con¬
nect
the
grour>ding
wire
of
the
turntable
to
the
terminal
marked
GND
on
the
amplifier.
Note:
The
unit
is
provided
with
two
sets
of
PHONO
input
terminals,
labeled
MM
and
MC
respectively.
When
using
a
turntable
equipped
with
a
moving
magnet
(MM)
type
cartridge,
use
the
PHONO
MM
terminals.
When
u$ir>g
a
turntable
with
an
MC
type
cartridge,
use
the
PHONO
MC
termiruls.
If
you
have
two
turntables,
one
with
an
MM
type
cartridge
arKf
the
other
with
an
MC
type,
you
may
connect
both
units
simultaneously.
(with
Moving
Magnet
Cartridge)
SWITCHES
AND
CONTROLS
(1)
Power
Button
Depress
this
button
to
turn
on
the
power
in
the
unit.
Press
the
button
a
second
time
to
release
it
arxJ
to
cut
off
the
power.
(2)
Power
Indicator
Glows
when
power
is
turned
on
with
the
power
button.
(3)
Headphone
Jack
For
private
listening,
plug
your
headphones
into
this
jack,
which
cuts
off
the
sound
from
speakers.
The
volume
of
the
headphone
sound
can
be
regulated
with
the
volume
control.
(4)
Volume
Control
Used
to
regulate
the
volume
level.
Turn
clock¬
wise
to
increase
the
volume,
and
counter¬
clockwise
to
reduce
it.
This
is
a
dual
con¬
centric
knob
which
permits
either
separate
or
combined
adjustment
of
both
channels.
(5)
Mode
Selector
Used
to
selea
the
reproducing
mode
of
the
stereo
signal
fed
into
the
unit.
STEREO
posi¬
tion
is
for
rtormal
stereo
reproduction,
and
MONO
position
for
morK)phonic
reproduction.
When
the
selector
is
set
to
MUTE
position,
output
of
the
unit
is
cut
off,
and
r>o
sound
will
be
heard.
(6)
Tape
Monitor
Selector
Used
to
listen
to
a
signal
supplied
from
the
tap>e
deck.
Set
the
selector
to
TAPE
1
position
for
the
signal
from
a
tape
deck
connected
to
TAPE
1
terminals
on
the
rear
parcel,
and
set
to
TAPE
2
for
the
deck
connected
to
TAPE
2
terminals.
When
it
is
set
to
the
>
2
”
position,
you
can
perform
tape-to-tape
copying
from
the
TAPE
1

Other manuals for Rotel RC-870

Preview: Owner's Manual
Owner's Manual3 pages
Question and Answer IconNeed help?

Do you have a question about the Rotel RC-870 and is the answer not in the manual?

Summary

Introduction to Rotel RC-870

Owners Manual Guidance

Keep the owner's manual near the unit and record the serial number for reference.

AC Outlet Safety Cautions

Important safety notes regarding AC outlet usage, wattage limits, and amplifier connections.

Connecting Audio Components

Pre-Operation Setup and Safety

Power Supply Connection

Connect the AC line cord to a wall outlet matching the unit's voltage rating.

AC Cord Handling Safety

Connect or disconnect the AC line cord only after turning off the power switch.

Ventilation and Heat Management

Ensure proper ventilation by not blocking holes and providing space to prevent overheating.

Cabinet Integrity

Do not open the cabinet; consult a professional if a foreign object enters the unit.

Installation Location Guidelines

Place the unit on a level, dry, cool surface away from direct sunlight and enclosed spaces.

Moving the Unit Safely

Disconnect the AC cord and all other connected cords before transporting the unit.

Handling a Wet Unit

Immediately disconnect power if the unit gets wet and consult a qualified professional.

Cleaning and Maintenance

Clean the front panel with a soft, dry cloth; avoid using chemicals like benzine or thinners.

Switches and Controls Overview

Power Button and Indicator

Button to turn the unit on/off; indicator lights up when power is active.

Headphone Jack Function

Allows private listening by plugging in headphones, muting the speakers.

Volume Control Operation

Dual concentric knob to adjust the volume level for both stereo channels.

Mode Selector Functions

Selects reproduction mode: STEREO, MONO, or MUTE.

Tape Monitor Selector

Used to listen to signals from connected tape decks for monitoring or copying.

Input Selector

Selects the desired audio input source (PHONO MM/MC, TUNER, CD).

Operating Procedures

Listening from Turntable

Instructions for setting up and listening to a turntable (MM or MC cartridge).

Listening from CD Player or Tuner

Steps to listen to a compact disc player or tuner inputs.

Playing Back Tape Decks

How to select and play back audio from a connected tape deck.

Recording Program Source

Procedure for recording a desired program source to a tape deck.

Dubbing Tapes

Instructions for performing tape-to-tape copying between two connected tape decks.

Troubleshooting and System Notes

Hum and Noise Issues

Guidance on potential causes of hum and noise in audio installations.

Protection Circuit Operation

Explanation of the protection relay circuit that prevents popping noise on power-up.

Voltage Selection

Information on the unit's variable voltage capability and settings for different regions.

Technical Specifications

Overview

  1. Function Description
  2. Usage Features
  3. Maintenance Features

The Rotel RC-870 is a stereo control amplifier designed to provide high-quality sound and top performance, incorporating the latest electronic technology and human-engineering concepts for functional beauty.

Function Description

The RC-870 serves as the central control unit for an audio system, allowing users to connect various components like turntables, CD players, tuners, and cassette decks, and manage their audio signals. It features an input selector to choose the desired audio source, a volume control for adjusting sound levels, and a mode selector for stereo, mono, or mute listening. The amplifier includes a protection relay circuit to prevent popping noises during power-on, ensuring a smooth and safe startup.

Usage Features

Power and Connections: Before operation, ensure all connections are properly made and the volume control is set to minimum. The unit connects to a household wall outlet, and its AC outlets (rated at 200 watts maximum) provide power to other audio components. These outlets are switched, turning on or off with the RC-870's power. It's crucial not to connect equipment exceeding the 200-watt rating or power amplifiers to these outlets. RCA pin cords are used for connecting components, with L (left) and R (right) markings matched correctly. A grounding wire from the turntable should be connected to the GND terminal on the amplifier.

Listening to a Turntable: The RC-870 offers two sets of PHONO input terminals: MM (Moving Magnet) and MC (Moving Coil). For an MM-type cartridge, use the PHONO MM terminals; for an MC-type cartridge, use the PHONO MC terminals. If you have two turntables, one with an MM cartridge and one with an MC cartridge, both can be connected simultaneously. To listen, set the Tape Monitor selector to OFF, the Input selector to the appropriate PHONO (MM or MC) position, start playing the turntable, and then raise the volume.

Listening to a CD Player or Tuner: To listen to a compact disc player or tuner, set the Tape Monitor selector to OFF. Then, set the Input selector to CD for a CD player or TUNER for radio broadcasts. Play the CD or tune to the desired station according to the equipment's instructions, and adjust the volume.

Playing Back a Tape Deck: To play back a tape, set the Tape Monitor selector to TAPE 1 or TAPE 2, start playback on the tape deck, and raise the volume.

Recording Program Source: To record a program, play the desired source. The signal from the source is sent through the TAPE MONITOR OUT terminals on the rear panel. Put the tape deck into record mode. During recording, the Volume control and Mode selector will not affect the signal sent through the TAPE MONITOR OUT terminals.

Dubbing (Tape-to-Tape Copying): The RC-870 supports two modes of dubbing between two connected tape decks: from TAPE 1 to TAPE 2, and from TAPE 2 to TAPE 1. To dub, set the Tape Monitor selector to "12" (TAPE 1 to TAPE 2) or "21" (TAPE 2 to TAPE 1). Play back the source tape (TAPE 1 or TAPE 2) and put the destination tape deck (TAPE 2 or TAPE 1) into record mode. During dubbing, you can listen to the signal with the Volume control or Mode selector, but these adjustments will not affect the recorded signal. When listening to a source selected by the Input selector, ensure the Tape Monitor selector is set to OFF.

Headphone Jack: For private listening, plug headphones into the headphone jack. This action cuts off sound from the speakers. The headphone volume can be regulated with the main volume control.

Volume Control: This dual concentric knob adjusts the volume level. Turning clockwise increases the volume, and counter-clockwise decreases it. It allows for either separate or combined adjustment of both channels.

Mode Selector: This selector chooses the stereo signal's reproducing mode. "STEREO" is for normal stereo reproduction, "MONO" for monophonic reproduction. The "MUTE" position cuts off the unit's output, silencing all sound.

Tape Monitor Selector: This selector is used to listen to a signal from a tape deck. Setting it to TAPE 1 listens to the deck connected to TAPE 1 terminals, and TAPE 2 listens to the deck connected to TAPE 2 terminals. The "12" position enables tape-to-tape copying from TAPE 1 to TAPE 2, and "21" enables copying from TAPE 2 to TAPE 1. Ensure this selector is set to OFF when listening to a source selected by the Input selector.

Input Selector: This selector chooses the input signal from components connected to PHONO MM, PHONO MC, TUNER, and CD terminals on the rear panel. It is operable when the Tape Monitor selector is set to the OFF position.

Hum and Noise Reduction: To minimize hum and noise in a high-fidelity installation, ensure all component connections are properly made and RCA pin jacks are securely inserted. The location of the audio system should be carefully selected to avoid noise from fluorescent lamps or thermostats. If noise persists, consult your dealer.

Maintenance Features

Power Supply Safety: Always connect the AC line cord to a household wall outlet, ensuring the outlet voltage matches the unit's electrical rating. Connect or disconnect the AC line cord only after turning off the power switch to prevent shock noise or speaker damage.

Ventilation: Never block the ventilation holes on the top and bottom of the unit. Provide ample ventilation space around the unit to prevent damage from excessive heat.

Cabinet Integrity: To avoid electric shock or component damage, never open the cabinet. If a foreign object enters the unit, turn off the power, disconnect the wall plug, and consult a qualified electrician or dealer.

Installation Environment: Place the unit on a level, flat surface free from humidity, vibration, high temperature, and direct sunlight. Avoid highly enclosed spaces like near a wall or on a bookshelf, as poor ventilation can cause undesirable effects.

Moving the Unit: When transporting, remove the AC cord from the wall outlet and all other connected cords from the rear panel to prevent wire breakage and short circuits.

Water Exposure: If the unit gets wet, immediately disconnect the AC cord and consult your dealer or a qualified electrician.

Cleaning: Do not use chemicals such as benzine or thinners on the front panel. Always use a soft, dry cloth to clean the unit.

Owner's Manual: Keep the owner's manual near the unit and record the serial number (found on the rear panel) on the cover for future reference.

Rotel RC-870 Specifications

General IconGeneral
TypeStereo Preamplifier
Frequency Response10Hz - 100kHz (±0.5dB)
Output1V (Pre out)
Weight5.9kg
Input Sensitivity (line)150mV
Signal-to-Noise Ratio (line)95dB
Output Impedance100Ω
Signal to Noise Ratio95dB
Dimensions (WxHxD)440 x 73 x 316mm
Input Impedance47kΩ (line)
Dimensions440 x 73 x 316mm
Input Sensitivity150mV (MM), 2.5mV (MC)

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