Model MRC44 Page: 17
© 2002 Xantech Corporation
NOTE 2: Program IR commands fro MRC44 Controller current sensing as described in
“PROGRAMMING SENSE CODES”.
(EXPANDED)
Connect CSM1’s as described above to the Primary Controller. Sense inputs are not available on the
Secondary Controller.
Zone Wiring Connections at the MRC44 Controller/Amplifier
(BASIC/ADVANCED/EXPANDED)
In typical applications, each zone will have at least one MRC44 Keypad and a pair of stereo speakers. In
those zones with both audio and video, at least one video monitor or television will also be used. In order to
make these connections, the minimum requirement is home runs of one CAT5 cable for each zone’s
keypad(s), two pairs for each pair of speakers, and one coaxial cable for a TV or monitor from each zone to
the MRC44 Controller/Amplifier location.
Speaker Connections
(BASIC/ADVANCED/EXPANDED)
1. Using good quality speaker wire, connect the individual speaker leads to the 4-terminal "SPEAKER"
connectors on the MRC44 as shown in Figure 3.
2. The MRC44 is 4-Ohm safe. Make sure the impedance presented to the speaker terminals by the speakers
(or any combination of speakers) is 4-Ohms minimum.
3. Be sure to observe correct polarity by connecting the "+" and "–" terminal from each channel on the MRC44
to the corresponding "+" and "–" terminals on each speaker. This will ensure correct "phasing". Since the
connectors are removable, you may unplug them for ease of lead assembly.
4. As a rule of thumb, use 18 gauge speaker wire for speaker runs up to 30' (9m), 16 gauge up to 70' (21m),
and 14 gauge up to 150' (39m). The 4-terminal connectors accept wire sizes up to 12-gauge max.
5. Strip the insulation back about 1/4" (6mm) and twist the strands on each lead to prevent fraying.
6. Speaker Phasing: To obtain stable imaging and full bass response, it is imperative that stereo speakers be
connected "in phase" with each other. You can verify this as follows:
a) If the "+" (positive) and "–" (negative) terminals on your speakers are correctly marked, and visible, and
you have wired the system with the positive connector on the rear of the MRC44 Controller/Amplifier
connected to the positive connector on the speaker and the negative connector on the rear of the
MRC44 Controller/Amplifier connected to the negative connector on the speaker, then the system will
be "in phase". No further action is required. Most manufacturers identify the positive terminal with a red
binding post, a "+" sign, or a red dot.
b) If you are unsure of the markings, you can verify the phasing. Using a mono sound source, such as AM
radio, alternately reverse the leads to one of the speakers. Pick the connection that delivers a solid
center image between the speakers as well as best bass response.
CAUTION: After lead ends are inserted and the screws tightened down, be sure there are no free strands
that could cause shorting!
