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Input Signal Connections
See Figure 2
The RMB-1085 has standard unbalanced
RCA-type input connectors, the type used on
nearly all audio equipment. There is an RCA
input for each of the five amplifier channels.
These RCA inputs accept audio signals from
preamplifiers or surround sound processors.
Use high quality audio interconnect cables for
best performance.
Speakers
The RMB-1085 has five sets of speaker con-
nectors, one for each amplifier channel.
Speaker Selection
The nominal impedance of the loudspeaker(s)
connected to each channel of the RMB-1085
in the various operating modes should be no
lower than 4 ohms.
Speaker Wire Selection
Use insulated two-conductor stranded wire to
connect the RMB-1085 to the speakers. The
size and quality of the wire can have an au-
dible 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 ap-
propriate 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 mistakenly 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 dif-
ferent color conductors (copper and silver).
There may be polarity indications printed on
the insulation. Identify the positive and nega-
tive conductors and be consistent with every
speaker and amplifier connection.
Speaker Connections
See Figure 2
The RMB-1085 has two color coded terminals
for each amplifier channel. 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-1085 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 insulation
from the end of each conductor. Be careful
not to cut into the wire strands. Unscrew (turn
counterclockwise) the speaker connector col-
lar. 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
connector lug or wire firmly in place.
NOTE: Be sure there are no loose wire
strands that could touch adjacent wires or
connectors.