MACKIE FRS1700 - Manual (Page 14)

14
FRS Series Amplifiers
FRS Series Amplifiers
Appendix B: Connections, math and stuff
1/4" TS Phone Plugs and Jacks
“TS” stands for Tip-Sleeve, the two connections
available on a mono 1/4" phone jack or plug. They
are used for unbalanced signals.
1/4" TS Unbalanced Wiring
Sleeve = Shield
Tip = Hot (+)
NL4 Connectors
When using the NL4 outputs in stereo or mono modes,
wire the NL4 connectors as shown below:
Stereo and Mono NL4 Connection
For other NL4 wiring configurations, see the hookup
diagrams on pages 6 and 7.
Loudspeaker Cable
Note: Because of the high output capability of the
amplifier, use only Class 3 (CL3) cable.
Use loudspeaker
cables with a
minimum conductor
size for the length
you need, as listed in
these tables.
This will minimize
power losses to less
than 0.5 dB. The
cable lengths listed
are “up to” lengths.
For in-between
lengths, use the next
larger conductor
gauge. Using
larger than the
recommended conductor size is always permissible.
Using smaller than recommended conductor size will
result in higher power losses.
2
2
3 1
1
SHIELD
COLD
HOT
SHIELD
COLD
HOT
3
SHIELD
COLD
HOT
3
2
1
SLEEVE
TIP SLEEVE
TIP
RING
RING
TIP
SLEEVE RING
SLEEVE
TIP
TIP SLEEVE
TIP
SLEEVE
Minimum AWG 4 ohm 8 ohm
18
10 ft 25 ft
16 25 50
14 25 75
12 50 125
10 100 200
Min Metric WG 4 ohm 8 ohm
12
3 m 8 m
14 8 15
16 8 25
20 15 40
25 30 60
COLD
HOT
1+
1+
1–
1–
2–
2+
Use a high-quality 3-conductor shielded cable to
connect the signal between the signal source (mixing
console, equalizer, etc.) and the balanced inputs to
the amplifier. If you are using unbalanced inputs, use a
high-quality 2-conductor shielded cable. Here are some
common audio connectors and their internal wiring:
XLR Connectors
XLR connectors are commonly wired as follows
(according to standards specified by the Audio
Engineering Society):
XLR Balanced Wiring
Pin 1 = Shield
Pin 2 = Hot (+)
Pin 3 = Cold (–)
1/4" TRS Phone Plugs and Jacks
“TRS” stands for Tip-Ring-Sleeve, the three
connections available on a stereo 1/4" or balanced
phone jack or plug. TRS jacks and plugs are used
for balanced signals and stereo headphones.
1/4" TRS Balanced Wiring
Sleeve = Shield
Tip = Hot (+)
Ring = Cold (–)