Hafler SR2800, SR2300CE Operation, Input, Daisy Chain Output, Earth Grounded Source Equipment

Operation

The amplifier will operate with either a balanced or unbalanced signal source.

INPUT

The input jacks used on the SR2300/2800 are dual function connectors which accept 1/4" TRS (Tip Ring Sleeve) or male XLR plugs. The amplifier will operate with either a balanced or unbalanced signal, from earth ground or floated source equipment. To determine if your equipment is earth grounded or floated, consult the owner’s manual or test with an ohm- meter.

The signal connections are as follows:

XLR Balanced 1/4" TRS Balanced 1/4" Mono Unbalanced

				sleeve shorts amplifier
Tip	Ring Sleeve	Tip	Sleeve
				— input to audio ground

DAISY CHAIN OUTPUT

Proper cable wiring will be determined by the source equipment that is feeding signal to the amplifier.

EARTH GROUNDED SOURCE EQUIPMENT

Source Units with a 3-pin mains power cord will typically have the audio output ground connected to the earth-grounded chassis. This can be verified with an ohmmeter by disconnecting the mains power cord from the AC outlet and checking for continuity between the earth ground pin and the audio output ground. This test should be done with the equipment installed in the complete system, including cables. If the audio output ground is connected to the earth ground pin, it is

earth grounded equipment.

Consult the following diagrams for examples of recommended wiring techniques:

GROUNDED,		XLR, 1/4" TRS Amplifier
	SHIELDED TWISTED PAIR	2
BALANCED
		3
SOURCE
		1
	shield connected at one end only	Shield
GROUNDED,		XLR, 1/4" TRS Amplifier
	SHIELDED TWISTED PAIR	2
UNBALANCED
		3

SOURCE

1

Audio

Ground

Chassis

Audio

Ground

GROUNDED, UNBALANCED SOURCE

shield connected at one end only	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

Float

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