Hafler P1500 - Manual (Page 13)

XLR Balanced Input
Check output of source unit for proper signal polarity
1/4" TRS Balanced Input
Check output of source unit for proper signal polarity
Pin 1 = GND
Pin 2 = (+)
Pin 3 = (–)
INPUT FROM
SOURCE
Tip = (+)
Ring = (–)
Sleeve = GND
INPUT FROM
SOURCE
Many popular mixers use unbalanced outputs and can be used with the Hafler amplifier. To minimize residual
ground noise, we recommend using twisted pair cable or short cable lengths in this type of configuration.
XLR Unbalanced Input
Connect (–) and GND (shield) terminals at both ends of cable to
prevent unstable amplifier operation
1/4" TRS Unbalanced Input
Pin 1 = GND
Pin 2 = (+)
Pin 3 = GND
INPUT FROM
SOURCE
Tip = (+)
Sleeve = GND
INPUT FROM
SOURCE
1
2
3
GND
–
+
1
2
3
SHIELD
+
SHIELD
SHIELD
+
–
+
INPUT
The input jacks located on the back of the amplifier are dual function connectors which accept 1/4" Phone (Tip
Ring Sleeve) or XLR plugs. The 1/4" Phone jack is connected according to conventional usage. The XLR jack is
connected according to the IEC and AES standard.
– 4 –