Wharfedale MP 1200 manual Unbalanced system

POWER AMPLIFIER

BALANCED INPUT WIRING TO WHARFEDALE PRO UNIT WITH XLR CONNECTORS

BALANCED OUTPUT		INPUT to Wharfedale Pro unit
	SIGNAL DIRECTION

2	1		1	2
	Ground (earth)	CABLE	Only connect ground if hum occurs
	3		3
			,,
BALANCED INPUT WIRING TO WHARFEDALE PRO UNIT WITH 1/4 JACK to XLR CONNECTORS
			INPUT to Wharfedale Pro unit
BALANCED OUTPUT		SIGNAL DIRECTION
RING
TIP			1	2
	SLEEVE	CABLE	Only connect ground if hum occurs
	Ground (earth)

3

,,

BALANCED INPUT WIRING TO WHARFEDALE PRO UNIT WITH STEREO 1/4 JACK to XLR CONNECTORS

SIGNAL DIRECTION

BALANCED OUTPUT

INPUT to Wharfedale Pro unit

RING		SLEEVE	TIP
TIP		RING
SLEEVE
Ground (earth)	CABLE	Only connect ground if hum occurs

,,

BALANCED INPUT WIRING TO WHARFEDALE PRO UNIT WITH XLR CONNECTORS to STEREO 1/4 JACK

BALANCED OUTPUT			INPUT to
		SIGNAL DIRECTION
			Wharfedale Pro unit
			SLEEVE
2	1		TIP
	Ground (earth)	CABLE	Only connect ground if hum occurs
	3		RING

,,

UNBALANCED INPUT AND OUTPUT WIRING WITH MONO 1/4 JACK CONNECTIONS

OUTPUT	SIGNAL DIRECTION	INPUT to Wharfedale Pro unit
OUTPUT Wharfedale Pro unit	SIGNAL DIRECTION	INPUT
		SLEEVE	TIP
TIP
SLEEVE
Ground (earth)	CABLE

A great deal of mistakes in sound installations can be down to wrongly wired audio connections. It is important that the connections are correct to suit your system.

Unbalanced system

An unbalanced audio system is typically a single conductor shielded with the centre conductor relaying the signal and the shield at ground.

Balanced system

Using a balanced audio system is where a two conductor shielded cable has each of the two centre conductors carrying the signal but of opposite phase. This gives each conductor an equal but inverted potential difference from that of the ground.

It is recommend that you use balanced audo connections if the unit before your amplifier has a balanced output. This will eliminate such as mains hum. For the best results xommon grounding should be avoided. This means not connecting the ground on both the amplifiers input and output connectors. Wharfedale pro advise that you connect the ground (shield) of the input connecting cable to the ground of the signal source while making sure the ground (shield) is not connected to the amplifier's input connector. The output cable connector from the amplifier if linking to another amplifier (daisy chained via parallel input sockets) should have the ground (shield) connected. The input connector ground (shield) to the following amplifier should not be connected. This is the process by which the ground (shield) is connected (tied) at the source unit but is not connect to the destination unit. If hum develops in some instances the ground (shield) can be connected on the input. Some manufacturers have units that recommend that the input connector ground (shield) is tied and the output disconnected. In this instance you may need to connect the input connector ground (shield) going to the input of the wharfedale pro unit. If an unbalanced system is used with XLR connections please connect pin 3 to pin 1 (ground) of the connector. This will mean that pin 2 transports the positive (+/hot) signal. If pin 3 to pin 1 are not connected this results in the negative (-/cold) input being 'open'. This will give an audible degradation of the signal to noise ratio. This would relate to both the input and output connectors and involve the cable ground (shield) connected at both.

BALANCED OUTPUT WIRING FROM WHARFEDALE PRO UNIT WITH XLR CONNECTORS TO BALANCED UNIT

OUTPUT from Wharfedale Pro unit		BALANCED INPUT
	SIGNAL DIRECTION

2	1		1	2
	Ground (earth)	CABLE	Only connect ground if hum occurs
	3		3

Please note that some manufacturers run their units with pin 2 (-/cold) and pin 3 (+/hot). This should be looked out for and then the wiring could be modified with labelled cables so that connections of +/hot go to their corresponding +/hot etc. Some manufactures run their units with balanced inputs and unbalanced outputs, therefore care should be taken with the connections when inserted into the system.

MP 1200/1800 6