5
CONNECTIONS
When you make connections make sure the power
switches of all components are off, including the
subwoofer.
Audio Cables
If you are connecting your subwoofer into a system
made up of separate components (preamps and power
amps), you will need audio cables long enough to reach
the subwoofer from the preamplifier and the power
amplifier.
Speaker Wire
Typical speaker wire has a pair of separate conductors
with insulating jackets that are molded together. We rec-
ommend that you use 16-gauge wire for connecting the
receiver to the front speakers.
Polarity
All speakers in a system must be connected with the
same polarity. Speaker wire is marked for polarity so
that you can identify which wire is the pair is which.
Polarity is shown by a color strip on the insulation, by
ridged molded into the insulation or be the colors of the
wires, one copper and one silver.
Strip the insulation from speaker wire ends to reveal the
bare conductors before connecting to receiver, sub-
woofer or speaker terminals.
Note:
Always connect the red (+) terminal on the receiv-
er to the red (+) terminal on the subwoofer, and the
black (–) terminal on the receiver to the black (–) terminal
on the subwoofer. The same is true for connecting the
receiver outputs to the front speakers red (+) to red (+)
and black (–) to black (–).
CONNECTION OPTIONS
Note:
Choose Method A or Method B connection
option. DO NOT combine them; choose only one.
Method A
This method provides the best sound quality and is pre-
ferred over Method B. The preamp (variable line level)
outputs from the receiver carry the full range of audio
signal frequency and the R8DT will use the active
crossover to filter out the mid- and high-range frequen-
cies, those which the subwoofer is not designed to
reproduce.
Note:
If the subwoofer is plugged into a different electri-
cal circuit from that which supports the rest of the audio
system, a ground loop may result. This causes a 60Hz
low-frequency hum. This can be eliminated by using the
same electrical circuit or by inserting a ground loop iso-
lation filter in line with the RCA cables.
Receiver
Preamp
Output
Receiver
Subwoofer
RCA
Cables
Speakers
METHOD A
R8DT SUBWOOFER
