Line Level Inputs; Speaker Selection; Speaker Wire Selection; Polarity And Phasing - Rotel RA-10 Owner's Manual

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Input Signal Connections
[See Figure 2 .]
NOTE: To prevent loud noises that neither you nor your speakers will
appreciate, make sure the system is turned off when you make any
signal connections.
Phono Input and Ground Connection
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Plug the cable from the turntable into the appropriate left and right phono
inputs. If the turntable has a "ground" wire, connect it to the screw terminal
to the left of the Phono inputs. It will help prevent hum and noise.

Line Level Inputs

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The CD, Tuner, and Aux inputs of the RA-10 are "line level" inputs. These
are for connecting components such as CD players, Hi Fi or NICAM
Stereo video cassette recorders, tuners, Laser Disc players or the analog
output from a CD-ROM drive.
The Left and Right channels are labeled and should be connected to the
corresponding channels of the source component. The Left connectors
are white, the Right connectors are red. Use high quality RCA cables for
connecting input source components to the RA-10. Ask your authorized
Rotel dealer for advice about cables.
Recorder Connections
[See Figure 2 .]
The Tape inputs and outputs can be connected to any record playback
device that accepts standard line level analog input and output signals.
Typically that will be a conventional tape recorder.
When connecting a recorder to the RA-10 remember that the outputs of the
recorder must be connected to the tape inputs of the RA-10. Similarly the
tape outputs of the RA-10 must be connected to the inputs of the recorder.
As with other sources be sure to connect the Left and Right channels of
each device to the proper channels on the associated components. Use
high quality connecting cables to prevent loss of sound quality.
NOTE: The Tape Outputs are not affected by the Volume, Balance or
Tone controls. They receive a fixed level signal.
Preamp Outputs
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The RA-10 has a set of preamp outputs. The signal from the source selected
with the Function Selector is always available from these outputs. Typically
these outputs are used to provide a signal to another integrated amplifier
or power amplifier, which is used to drive remote speakers
NOTE: Changes to the settings of the Volume, Balance or Tone controls
affect the signal from the Preamp Outputs.
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Speaker Outputs
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Speaker Selector Switch
[See Figure 2 .]
The RA-10 has two sets of speaker outputs, labeled "A"
speaker outputs are controlled by the switch

Speaker Selection

If only one set of speakers will be used at any given time, the speakers may
have an impedance as low as 4 ohms. If there are times when both the A
and B speakers will be used, all the speakers should have an impedance
of 8 ohms or more. Speaker impedance ratings are less than precise. In
practice, very few loudspeakers will present any problems for the RA-10.
See your authorized Rotel dealer if you have any questions.

Speaker Wire Selection

Use insulated two-conductor stranded wire to connect the RA-10 to the
speakers. The size and quality of the wire can have an audible effect
on the performance of the system. Standard speaker wire will work, but
can result in lower output or diminished bass response, particularly over
longer distances. In general, heavier wire will improve the sound. For
best performance, you may want to consider special high-quality speaker
cables.Your authorized Rotel dealer can help in the selection of cables
for your system.

Polarity and Phasing

The polarity – the positive/negative orientation of the connections – for
every speaker and amplifier connection must be consistent so all the
speakers will be in phase. If the polarity of one connection is reversed,
bass output will be very weak and stereo imaging degraded. All wire
is marked so you can identify the two conductors. There may be ribs
or a stripe on the insulation of one conductor. The wire may have clear
insulation with different color conductors (copper and silver). There may
be polarity indications printed on the insulation. Identify the positive and
negative conductors and be consistent with every speaker and amplifier
connection.

Speaker Connection

Turn off all the components in the system before connecting the speakers.
The RA-10 has color-coded binding post type speaker connectors on the
back panel (except in European Community countries where their use
is not permitted). These connectors accept bare wire, connector lugs, or
dual banana type connectors.
Route the wire from the RA-10 to the speakers. Give yourself enough
slack so you can move the components to allow access to the speaker
connectors. If you are using dual banana plugs, connect them to the wires
and then plug into the backs of the binding posts. The thumbscrews of the
binding posts should be screwed in all the way (clockwise).
If you are using terminal lugs, connect them to the wires. If you are attaching
bare wires directly to the binding posts, separate the wire conductors
and strip the insulation from the end of each conductor. Be careful not
to cut into the wire strands. Unscrew (turn counterclockwise) the binding
post thumbscrews. Place the connector lug or wire around the binding
post shaft. Turn the thumbscrews clockwise to clamp the connector lug
or wire firmly in place.
NOTE: Be sure there are no loose wire strands that could touch adjacent
wires or connectors.
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u and "B" i .The
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on the front panel.
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