Hafler GX2300CE, GX2600CE manual Floated Source Equipment, floated equipment

GROUNDED, UNBALANCED SOURCE

XLR, 1/4" Mono Amplifier

COAX OR TWISTED PAIR	2
	3
Shield	1
1/4" Mono: sleeve shorts
— input to Audio Ground;
XLR: short pins 1 & 3 together

Audio

Ground

Float

FLOATED SOURCE EQUIPMENT

Source units with a 2-pin mains power cord have no means to connect the audio output ground to earth ground, so usually the audio output ground is floated from earth ground. However, this does not insure that when installed in a system, the audio output ground will remain floated from earth ground. The input cable to this equipment may already be connected to earth ground earlier in the audio chain, and it will typically be carried straight through to the output. It is also possible that the audio output ground connects to the earth ground through the chassis to an earth-grounded rack. The only way to know for sure is to test the installed system. Use an ohmmeter to check for continuity between the earth ground socket of the mains power receptacle and the audio output ground. If the audio output ground is not connected to earth ground, it is

floated equipment.

Consult the following diagrams for examples of recommended wiring techniques:

FLOATED,		XLR, 1/4" TRS Amplifier
	SHIELDED TWISTED PAIR	2
BALANCED
		3
SOURCE
		1
	shield connected at both ends	Shield
FLOATED,		XLR, 1/4" TRS Amplifier
	SHIELDED TWISTED PAIR	2
UNBALANCED
		3

SOURCE

1

Audio

Ground

Chassis

Audio

Ground

FLOATED, UNBALANCED SOURCE

shield connected at both ends		Shield
		XLR, 1/4" Mono Amplifier
COAX OR TWISTED PAIR			2
			3
		Shield	1
		1/4" Mono: sleeve shorts
		— input to Audio Ground;
	XLR: short pins 1 & 3 together

Chassis

Audio

Ground

Chassis

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