Polarity And Phasing; Speaker Connections; Troubleshooting; Front Panel Power Indicator Is Not Lit - Rotel RMB-1066 Manuel D'utilisation

RMB-1066 Six Channel Power Amplifier

Polarity and Phasing

The polarity – the positive/negative orienta-
tion 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 mistakenly re-
versed, bass output will be very weak and ste-
reo 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 insula-
tion 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 Connections

See Figures 2 & 3
The RMB-1066 has two pair of color coded
connections for each group of amplifier chan-
nels. Labels above the connectors show the
proper connections for connecting speakers
in Stereo mode. Labels below show the proper
connections for Bridged Mono mode.
These speaker connectors accept bare wire,
connector lugs, or "banana" type connectors
(except in the European Community countries
where their use is not permitted).
Route the wires from the RMB-1066 to the
speakers. Give yourself enough slack so you
can move the components to allow access to
the speaker connectors.
If you are using banana plugs, connect them
to the wires and then plug into the backs of
the speaker connectors. The collars of the
speaker connectors 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 speaker connectors, separate
the wire conductors and strip back the insula-
tion from the end of each conductor. Be careful
not to cut into the wire strands. Unscrew (turn
counterclockwise) the speaker connector collar.
Place the connector lug around the shaft, or
insert the bundled wire into the hole in the shaft.
Turn the collars clockwise to clamp the con-
nector lug or wire firmly in place.
NOTE: Be sure there are no loose wire
strands that could touch adjacent wires or
connectors.
In Stereo mode: Connect the left speaker
to the pair of speaker connectors labeled LEFT.
Connect the right speaker to the speaker
connectors labeled RIGHT. Follow the labels
printed above the connectors, observe cor-
rect polarity, and make sure the INPUT SE-
LECT switch for that pair of amplifier chan-
nels is set to the STEREO position. (See Fig-
ure 2)
In Bridged Mono mode: Connect each
speaker to the POSITIVE terminals of the LEFT
and RIGHT speaker connections on the back
of the RMB-1066. There are BRIDGED + and
– labels printed below each group of speaker
terminals to assist in maintaining proper polar-
ity.
Connect the positive terminal of the speaker
to the speaker connector labeled LEFT + or
BRIDGED +. Connect the negative terminal of
the speaker to the speaker connector labeled
RIGHT + or BRIDGED –. Observe correct
polarity, and make sure the INPUT SELECT
switch is set to the BRIDGED position. (See
Figure 3)
8

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-1066, refer
to the suggestions for the following conditions:
Front Panel Power Indicator
Is Not Lit
No main power to the RMB-1066. 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 trigger
signal is present at rear panel screw termi-
nals.

No Sound

If the amp is getting AC power, but is pro-
ducing no sound, check the PROTECTION
INDICATORS 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 ste-
reo/mono configuration.

Protection Indicator Is Lit

The front panel PROTECTION INDICATORS
light when the RMB-1066 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.