Cloud LM-2 Series User's Guide download pdf (Page 11)

Z4-8MK3 Installation and User Guide 11

Unbalanced

input s

LEFT

RIGHT

SCN

When using single-core cable,

join ‘cold’ to screen at the

source

LEFT RIGHT

pin 1 ground

pin 2 hot

pin 3 cold

Balanced outputs (XLRs):

Unbalanced

inputs

LEFT

RIGHT

SCN

When using twin-and-screen

cable, join ‘cold’ to screen at

MK3/Z8MK3 end

LEFT RIGHT

pin 1 ground

pin 2 hot

pin 3 cold

Balanced outputs (XLRs):

Zone outputs

Connect the inputs of the power ampliers feeding the

loudspeakers for each zone to ZONE 1 to 8*. Note that the

zone outputs are all mono. All outputs are balanced and will

drive input impedances down to 600 ohms. Nominal output

level is 0 dBu (775 mV). The output is designed to drive

professional/industrial power ampliers with balanced inputs

(typically on XLRs). In this case, wire as the diagram below.

Note that the screen can be left unconnected at the source

end if earth loops are a problem.

SCN

pin1ground

pin2hot

pin3cold

Balanced inputs (XLRs):

SCSCN

Z4MK3/Z8MK3 Balanced output:

pin 1 ground

pin 2 cold

pin 3 hot

The screen connection at the

zone end may be omitted if it

helps reduce earth loops

*ZONE 1 to 4 only on Z4MK3.

Ampliers with unbalanced inputs:

If audio ampliers with only unbalanced inputs are being used

(e.g. hi- ampliers), the following wiring should be adopted:

SCSCN

Z8II/Z4II Balanced output:

pin 1 ground

pin 2 cold

pin 3 hot

When using single-core cable,

don’t connect ‘cold’ at the

II/Z4II

Unbalanced input (e.g. phono)

SCSCN

/Z4

Balanced output:

pin 1 ground

pin 2 cold

pin 3 hot

Unbalanced input (e.g. phono)

When using twin-and-screen

cable, don’t connect the screen

at the amplifier end.

Microphone inputs

Mic 1 and Mic 2 inputs are intended for the direct connection

of microphones. They are electronically balanced and

transformerless with an input impedance of greater than

2 kohms and optimised for use with microphones of 200 to

600 ohms impedance. The screw terminal input connectors

should be wired thus:

PIN CONNECTION

1 Screen

2 Signal ‘-’ (cold)

3 Signal ‘+’ (hot)

Unbalanced microphones may be used by connecting pin 2

to pin 1 (cable screen) in the mating (male) screw-terminal

connector. 15 V phantom power is available, see “Phantom

Power” on page 15.

Each mic input may be routed to any of the zones in use, at any

level in each zone. Each zone may be congured so that any

microphone announcements automatically reduce the music

level in that zone while the announcement is in progress (see

“Mic 1/Mic 2 priority” on page 16 for more details.)

The Paging Mic input has the same electrical characteristics

as Mic 1 and Mic 2, but is intended for the connection of

a dedicated paging microphone. Mic signals at this input

will route to all zones at a level determined by the front

panel preset Paging Level controls, ducking the music while

an announcement is in progress. VOX or contact-closure

triggering of the paging priority circuit may be selected; see

“Paging mic priority” on page 16 for more details.

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Cloud LM-2 Series User's Guide Page 11

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