Connect Your Speakers; Connect The Trackers' Radio Receivers; A) If You Are Using Modified Samson Wireless Microphone Systems From Martin - Martin LIGHTING DIRECTOR User Manual

3. Connect your speakers

Connect each of the four MLD speakers to the MLD box. This must be done using the
speaker cables supplied (20 m each) and an appropriate XLR male to female extension
cable, if necessary. Wiring of the XLR cables conforms to normal audio speaker cable
wiring conventions. The female XLR connectors must be plugged into the MLD box's
audio output jacks. The male XLR connectors plug into the speakers' female XLR.
Numbering of the output jacks goes from left to right. The speaker output jack #1
closest to the left of the box must be connected to speaker A; the next one, output #2,
is for speaker B; the next is for speaker C and the jack closest to the right of the box is
for speaker D. Figure 5 shows the numbering of jacks and the cabling connections.
DMX 512 remote SPEAKERS
TRACKERS
DC out
control
mains
in out
1 2 3 4
1 2 3 4
to PC
V
male XLR jacks for speaker
male & female DMX jacks female 1/4" phone jacks for
ultrasonic output
for DMX input and output tracker radio receiver intput
Figure 5 - MLD external box connections (back view)

4. Connect the trackers' radio receivers

a) If you are using modified Samson wireless microphone systems from
Martin:
Using the supplied male to male 1/4" phono jack cable(s), the output of each tracker's
radio receiver should be plugged into one of the four female 1/4" (6.35 mm) jacks on
the MLD box. As with the speaker output jacks, the 1/4" radio input jacks on the MLD
box are numbered from left to right. The connector nearest the left of the box is for
tracker 1. The next connector is for tracker 2, the next for tracker 3, and the
connector nearest the right of the box is for tracker 4. Figure 5 above shows the
numbering of jacks on the back of the MLD box.
Side note: Under ideal circumstances the distance between the tracker and its radio receiver
should not be bigger than about 30 m (100 ft). In very large events where the control booth is
farther away than that, it may be necessary to place the radio receiver closer to the stage and
run a long audio cable between it and the MLD. If so, you might want to use the receiver's
balanced output (the XLR plug) with a direct box (also called an audio or impedance matching
transformer) rather than the normal 1/4" phono output.
IMPORTANT NOTE: The Samson radio receivers have two outputs: one, on the front,
is a female 1/4" phono jack with a line-level signal (-10dB 5KΩ) and the other, on the
back, is a male XLR output with a mic-level signal (-30dBm 600Ω). The MLD inputs
expect a line-level signal so normally you would use the 1/4" phono jack output. If you
need to use the XLR output, make sure that the signal is amplified before it reaches the
MLD.
MLD manual 1.1 Page 21