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GL2200 USER GUIDE
8
PLUGGING UP THE CABLES
The GL2200 uses professional grade 3-pin XLR, 1/4" TRS jack and RCA PHONO sockets.
Where possible use balanced connections to prevent noise and interference pickup especially
on long cable runs. Avoid running audio cables next to AC mains, computer or lighting cables,
near thyristor dimmer units or power supplies etc. The use of low impedance sources such as
good quality microphones of 200 ohms or less significantly reduces interference pickup. Many
problems can be avoided by taking time to check that all cables are correctly wired. Avoid
reversing + and - on balanced connections as this will result in out of phase signals (reverse
polarity) causing signal cancellation effects. This situation is particularly common in multi-
microphone mixing. Use professional quality cable and carefully soldered connections. The
following wiring convention is used:
CABLE WIRING
To connect an unbalanced source to a balanced console input, link the cold input (XLR pin 3 or
jack ring) to 0V earth (pin 1 or jack sleeve) at the console. To connect a balanced console
output to an unbalanced destination link the cold output to 0V earth at the console.
¼" 3-POLE (STEREO) JACK PLUG
R
in
g
T
ip
S
le
e
v
e
INPUT
3-PIN XLR FEMALE PLUG
3-PIN XLR MALE PLUG
OUTPUT
1
3
3
2
2
1
1
3
2
2
3
1
3-PIN XLR MALE PLUG
INPUT
3-PIN XLR FEMALE PLUG
OUTPUT
T
ip
S
le
e
v
e
¼" 2-POLE (MONO) JACK PLUG
Link
T
ip
R
in
g
S
le
e
v
e
OUTPUT
INPUT
SINGLE SCREENED CABLE
SINGLE SCREENED CABLE
TWIN SCREENED CABLE
¼" 3-POLE (STEREO) JACK PLUGRCA PHONO PLUG
CONSOLE
CONNECTIONS
CONNECTIONS
CONSOLE
CONSOLE
CONNECTIONS
BALANCED
UNBALANCED
UNBALANCED
Tip
Ring
Sleeve
Tip
Sleeve
Ring
Sleeve
Tip
Link
¼” TRS jack
Tip + / hot / signal / left / send
Ring - / cold / 0V / right / return
Sleeve 0V earth shield
XLR
Pin 1 0V earth shield
Pin 2 + / hot / signal
Pin 3 - / cold
Deselect input channel +48V when inputs are connected to non-phantom
p
owered
,
mic
,
line or unbalanced sources.
8


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