Z4

II

/Z8

II

: Zone Mixers

C l e a r l y b e t t e r s o u n d

Z4

II

Zone Mixer

General Description

The Cloud Z4

II

and Z8

II

are multi-zone, rack-mounting (3U) audio mixers. They combine simple control of background music with versatile microphone paging for up to eight separate areas. They are suitable for use in many types of premises, including pubs, bars, clubs, shops, offices, hotels, etc.

Both models have six stereo line inputs and three microphone inputs, one of which is configured specifically for use with paging mics. The

Z4

II

has four separate mono zone outputs, and the Z8

II

eight; apart from the number of supported zones, the models are identical. The front panel provides separate controls for music source selection, music level and two mic levels in each zone. Bose® EQ cards may be fitted to any or all outputs.

The Z4

II

and Z8

II

are directly compatible with Cloud PM Series paging microphones; alternatively, the paging mic input can be configured to suit most OEM paging systems. Zone selection for paging is via short-to-ground access connections, and each zone may be independently configured for music ducking, triggered either by the access port or VOX control. The ducking feature has selectable release times. The paging mic has priority over the other mic inputs

• Provides flexible music, paging and announcement facilities in four (Z4

II

) or eight (Z8

II

) zones

• Front panel user controls for music source, music level and

Mic 1/Mic 2 level in each zone

• Six (unbalanced) stereo line inputs with individual gain trim controls

• Two general-purpose balanced mic inputs – 15 V phantom power available on either or both

• Separate balanced paging mic input – 15 V phantom power available

• Contact closure access port for paging zone selection

• 100 Hz hi-pass filter on all mic inputs

• Sensitivity and HF/LF EQ adjustment for each mic input (rear panel)

• Four (Z4

II

) or eight (Z8

II

) electronically-balanced mono zone outputs

Z8

II

Zone Mixer

(Mic 1 and Mic 2). Paging mic level to each zone is set with a recessed front panel preset control.

When Mic1 and/or Mic 2 are in use, music ducking can also be enabled on a per-zone basis; further, Mic 1 may be set have priority over Mic 2 to prevent announcement clashes. Additionally, Line 6 input may be set to have priority over any other selected music source in any zone, to facilitate connection of a digital sound store or similar device.

Music level only, or music level and source selection may be controlled remotely in each zone if wished, using standard Cloud

RL-1 and RSL-6 remote control plates. Each zone section of the

Z4

II

and Z8

II

is also provided with a multi-purpose facility port. The main purpose of this port is to connect optional remote input plates, which allow mic and/or line level sources located in the zone – such as local mics, DJ consoles, laptops, MP3 player docks, etc. - to be routed to the zone’s audio system. Various options are available to configure what priorities sources connected via the facility port have relative to the unit’s primary sources. The facility port can also be used as a general purpose, balanced, line level, auxiliary zone input.

• HF/LF music EQ adjustment on each zone output

• Mic 1 may be selected to have priority over Mic 2

• Configurable music-under-mic ducking, per zone, per mic

• Zone 1 has selectable LINE 6 priority with choice of release times

• Music Mute control input (NO or NC) for interface to emergency system

• Compatible with standard Cloud remote control panels: RL-1

(music level) and RSL-6 (music level and source selection), perzone

• Configurable, per-zone facility port for optional remote dual mic (DM-1) and mic/line (LM-1) input plates

• Facility port can act as balanced aux input to each zone

• Optional Bose® EQ cards available

• 3U 19” rack-mounting units

Cloud Electronics Limited

140 Staniforth Road, Sheffield, S9 3HF. England. Telephone: +44 (0)114 244 7051 Fax: +44 (0)114 242 5462 Web: www.cloud.co.uk Email: [email protected]

Front and Rear Panel Illustrations

Z4

II

Front and Rear

C l e a r l y b e t t e r s o u n d

REMOTE

SOURCE

LEVEL

3

2

1

REMOTE

(IN)

MUSIC CONTROL

REMOTE

SOURCE

LEVEL

3

2

1

REMOTE

(IN)

MUSIC CONTROL

BALANCED

INPUT

HF

MUSIC EQ

LF

3

2

1

10 dB

10

10 dB

10

FACILITY

PORT

ZONE

4

OUTPUT

0dBu

MICROPHONE 1

GAIN LF HF

10 dB

50 10 dB

10 10 dB

10

BALANCED

INPUT

HF

MUSIC EQ

LF

3

2

1

10

10 dB

10

10 dB

FACILITY

PORT

ZONE

4

OUTPUT

0dBu

MICROPHONE 2

GAIN LF HF

10 dB

50 10 dB

10 10 dB

10

REMOTE

SOURCE

LEVEL

HF

MUSIC EQ

LF

3

2

1

BALANCED

INPUT

3

2

1

REMOTE

(IN)

MUSIC CONTROL

REMOTE

SOURCE

LEVEL

10 dB

10

10 dB

10

FACILITY

PORT

ZONE

4

OUTPUT

0dBu

10 dB

50

PAGING MIC

LF HF

10 dB

10 10 dB

10

HF

MUSIC EQ

LF

3

2

1

R

GAIN

0

L

3

2

1

REMOTE

(IN)

MUSIC CONTROL

10

10 dB

10

10 dB

FACILITY

PORT

ZONE

4

OUTPUT

0dBu

3

2

1

3

2

1

R R

L

GAIN

0

GAIN

0

L

OUTPUT TERMINATION

BALANCED

IN-PHASE ( )

REV-PHASE ( )

GROUND (SCREEN)

UNBALANCED

HOT ( )

GROUND (SCREEN)

NO CONNECTION TO PIN 2

R R

L

GAIN

0

GAIN

0

L

10 dB 10

LINE 1 LINE 2

10 dB 10 10 dB 10

LINE 3 LINE 4

10 dB 10 10 dB 10

LINE 5

Z4

CLOUD ELECTRONICS LIMITED

SHEFFIELD S9 3HF ENGLAND

MADE IN ENGLAND

TELEPHONE 0114 244 7051

FAX 0114 242 5462

[email protected]

REFER TO BOTTOM

PANEL FOR INSTALLATION

AND CONFIGURATION

DETAILS

R

L

GAIN

0

LINE 6

10 dB 10

THIS EQUIPMENT MUST BE EARTHED

10% 40-60Hz

REPLACE FUSE WITH SAME TYPE AND RATING

FUSE RATING

FOR 230V SUPPLY USE T125mA (20mm x 5mm)

FOR 115V SUPPLY USE T250mA (20mm x 5mm)

PAGING MICROPHONE

ZONE ACCESS SWITCHING

LINK TO 0V TO OPEN RESPECTIVE ZONE

MUSIC MUTE

NORMALLY OPEN

ISOLATED

RELAY CONTACTS

0V 4 3 2 1 V

FUSE

Z8

II

Front and Rear

3

2 LOCAL

1 REMOTE

(IN)

MUSIC

CONTROL

ZONE

8

TE LE

3

2 LOCAL

1 REMOTE

(IN)

MUSIC

CONTROL

ZONE

7

TE LE

3

2 LOCAL

1 REMOTE

(IN)

MUSIC

CONTROL

ZONE

6

TE LE

3

2 LOCAL

1 REMOTE

(IN)

MUSIC

CONTROL

ZONE

5

TE LE

3

2 LOCAL

1 REMOTE

(IN)

MUSIC

CONTROL

ZONE

4

TE LE

3

2 LOCAL

1 REMOTE

(IN)

MUSIC

CONTROL

ZONE

3

TE LE

0V

(SCREEN)

HF

MUSIC EQ

LF

3

2

1

BALANCED

INPUT

10 dB

10

10 dB

10

OUTPUT

0dBu

HF

MUSIC EQ

LF

3

2

1

MICROPHONE 1

GAIN LF HF

10 dB

50 10 dB

10 10 dB

10

BALANCED

INPUT

10 dB

10

10

10 dB

OUTPUT

0dBu

3

1

HF

MUSIC EQ

LF

2

MICROPHONE 2

GAIN LF HF

10 dB

50 10 dB

10 10 dB

10

10 dB

10

10

10 dB

OUTPUT

0dBu

HF

MUSIC EQ

LF

3

2

1

BALANCED

INPUT

10 dB

10

10

10 dB

OUTPUT

0dBu

HF

MUSIC EQ

LF

3

2

1

10 dB

10

10 dB

10

OUTPUT

0dBu

HF

MUSIC EQ

LF

3

2

1

10 dB

PAGING MIC

GAIN LF

50

HF

10 dB

10 10 dB

10

GAIN

0

R

L

10

10dB 10

LINE 1 LINE 2

R

10 dB

10

10

10 dB

L

GAIN

0

OUTPUT

0dBu

R

GAIN

0 L

3

2

1

HF

MUSIC EQ

LF

10dB 10 10dB 10

LINE 3

3

2 LOCAL

1 REMOTE

(IN)

MUSIC

CONTROL

ZONE

2

10 dB

10

10

10 dB

OUTPUT

0dBu

R

L

GAIN

0

TE LE

3

2

1

HF

MUSIC EQ

LF

R

GAIN

0 L

10 dB

10

10

10 dB

OUTPUT

0dBu

REFER TO BOTTOM

PANEL FOR INSTALLATION

AND CONFIGURATION

DETAILS

10% 40-60Hz

REPLACE FUSE WITH SAME TYPE AND RATING

FUSE RATING

FOR 230V SUPPLY USE T125mA (20mm x 5mm)

FOR 115V SUPPLY USE T250mA (20mm x 5mm)

R

L

GAIN

0

PAGING MICROPHONE

ZONE ACCESS SWITCHING

LINK TO 0V TO OPEN RESPECTIVE ZONE

MUSIC MUTE

CONNECT TO

NORMALLY OPEN

ISOLATED

RELAY CONTACTS

LINE 4

10dB 10 10dB 10

LINE 4

3

2 LOCAL

1 REMOTE

(IN)

MUSIC

CONTROL

ZONE

1

Z8

CLOUD ELECTRONICS LIMITED

SHEFFIELD S9 3HF ENGLAND

MADE IN ENGLAND

TELEPHONE 0114 244 7051

FAX 0114 242 5462

[email protected]

THIS EQUIPMENT MUST BE EARTHED

FUSE

LINE 6

10dB 10

0V 8 7 6 5 4 3 2 1 V

Block Diagram - Z8

II

(8 zones)

C l e a r l y b e t t e r s o u n d

System Example - Installation for 3 Zones

The diagram depicts a system where four possible music (or other audio) sources are made available to three or more zones (areas). Only three are shown for clarity. Points to note:

CD PLAYER

FREEVIEW

RECIEVER

• Area 1 and Area 3 have remote control plates installed: an RSL-6 (music level and source) in Area 1 and an RL-1 (music level only) in Area 3. These are wired to the Music

Control Ports for their respective zone outputs.

• Area 1 also includes a DM-1 dual mic input plate, permitting microphones to be plugged in locally, for PA purposes in that area. This is wired to Zone 1’s Facility Port.

• Area 2 includes an LM-1 mic/line input plate, wired to Zone 2’s Facility Port. This would allow both a microphone and a portable stereo music source to be connected in that area. The LM-1 also provides music source and level control; note that the LM-1 does not require a second connection to the

Music Control Port to enable this.

• Area 3 has a Cloud PM paging microphone, which would be used to originate voice messages to any of the other areas. The paging level to Area 3 (if required) would be adjusted on installation to be at a level that does not cause feedback.

PC

RADIO

TUNER

LOCAL

MICS

MIC 1

MIC 2

PAGING MIC

PAGING ACCESS

ZONE 1

ZONE 2

ZONE 3

ZONE 4

ZONE 5

ZONE 6

ZONE 7

ZONE 8

INPUT 1

INPUT 2

INPUT 3

INPUT 4

INPUT 5

INPUT 6

ZONE 1

ZONE 2

ZONE 3

ZONE 4

ZONE 5

ZONE 6

ZONE 7

ZONE 8

ZONE 1

ZONE 2

ZONE 3

ZONE 4

ZONE 5

ZONE 6

ZONE 7

ZONE 8

OTHER

AREAS

POWER

AMPLIFIERS

AREA 1

RSL-6 DM-1

AREA 2

LM-1

AREA 3

RL-1

PM PAGING

MICROPHONE

C l e a r l y b e t t e r s o u n d

Graphs

Z4

II

/Z8

II

Music Crosstalk

Music Crosstalk d

B u

-50

-60

-70

-80

-90

+0

-10

-20

-30

-40

-100

-110

-120

20 50 100 200 500

Hz

1k 2k 5k

Sweep Trace Line Style Thick Data

1

2

1

1

Dot

Solid

1

1

Anlr.Ampl

Anlr.Ampl

Axis

Left

Left

Comment

Crosstalk, Adjacent Line Inputs

Crosstalk Between Outputs

10k

Note that the crosstalk was not measured using bandpass techniques. It is below the noise floor between zone outputs and between line inputs below 1kHz.

20k

Z4

II

/Z8

II

Music Output Frequency Response

+3 d

B u

-0

-0.5

-1

-1.5

-2

-2.5

-3

20

+2.5

+2

+1.5

+1

+0.5

50 100 200 500

Hz

1k 2k 5k 10k 20k

Technical Specifications

Line Inputs

Frequency Response

Sensitivity

Input Gain Control

Input Impedance

Headroom

Noise

Equalisation

Microphone Input

20 Hz - 20 kHz, ±0.5 dB

200 mV (-12.0 dBu) to 2.0 V (+8 dBu)

20 dB range

47 kΩ

>20 dB

<-90 dBu rms typical

@ 0 dB gain, 22 Hz - 22 kHz

LF: ±10 dB @ 50 Hz

HF: ±10 dB @ 10kHz

Frequency Response

Gain Range

Input Impedance

100 Hz -3 dB (filter) to 20 kHz,

±0.5 dB

10 dB to 50 dB

>2 kΩ (balanced)

Common Mode Rejection >70 dB @ 1 kHz

Headroom >20 dB

Noise

Equalisation

-120 dB EIN, 22 Hz -22 kHz

(Z

S

=150Ω)

LF: ±10 dB @ 100 Hz,

HF: ±10 dB @ 5 kHz

Outputs

Output 0 dBu (775 mV) balanced

Minimum load impedance 600 Ω

Maximum output level +20 dBu (7.75 V)

General

Power Input

Power consumption

Fuse Rating

Fuse Type

Dimensions (w x h x d)

Weight

230 V/115 V ±10%, 40 – 60 Hz

Z8

II

: 28 VA

Z4

II

: 20 VA

Z8

II

: T125 mA 230 V, T250 mA 115 V

Z4

II

: T100 mA 230 V, T200 mA 115 V

20 mm x 5 mm class 3T 250 V

482.6 mm x 132.5 mm (3U) x 160 mm

Z8

II

: 4.40 kg

Z4

II

: 3.83 kg

C l e a r l y b e t t e r s o u n d

Architect’s and Engineer’s Specification

The mixer shall be available in two versions, with four or eight electronically balanced mono outputs (zones) on rear panel multipin connectors respectively.

Unless otherwise stated, all specifications which follow shall apply to both versions, with the two versions differing only in those facilities specific to the outputs.

The mixers shall be equipped with six unbalanced stereo music inputs on rear panel phono sockets (RCA jacks) and three electronically balanced microphone inputs (XLR sockets). One of the microphone inputs shall be configured specifically to operate with paging microphones.

The music input to each zone and the music level in the zone shall be adjustable by front panel controls. Each zone shall also have its own front panel microphone level controls, one per microphone input. The level control for the paging microphone input shall be of the preset type and recessed behind the panel. It shall be possible to control the level of the music source independently of the microphone levels in each channel.

Each music input shall have a rear panel input gain trim control with a range of

20 dB. Two-band equalisation adjustment shall be provided on the rear panel for the music signal in each zone. Two-band equalisation adjustment shall also be available for each microphone input; phantom power shall be available at any or all microphone inputs when selected by internal jumpers.

A control input shall be provided to activate the paging microphone input by external contact closure, and route its signal to any or all zones, replacing the music signal while the contacts are closed. It shall also be possible to configure the mixer to perform the following functions: i) detection of a signal on either non-paging microphone input will automatically reduce the music level by 30 dB, ii) detection of a signal on the paging microphone input will automatically route the signal to all zones, iii) one line input will automatically override all others in all zones, even if unselected.

Optional remote control panels shall be available to permit control of i) music level in any zone; ii) music source selection and music level in any mixer channel; it shall be possible to retrofit these to the mixer at any time. The remote control panels shall connect via a rear panel multipin connector. It shall be possible to disable either the front panel music level or the music level and music source selection controls by moving internal jumpers. An external control input shall be provided to allow muting of the music source by a fire alarm or other external emergency system via isolated, ‘volt-free’ contacts, and this input shall be configurable to respond to either a short or open external circuit. Front panel LED indication of the muting action shall be provided.

Each zone output shall be provided with an additional balanced input on a multipin connector; this input shall feed only its own zone. Optional input connection plates shall be available to allow the connection of external microphone and line level audio sources at remote locations, and these plates shall connect to the mixer via the multipin connector, which also shall supply

DC power and all necessary control interface connections. The remote input plates shall be available in two versions: i) to allow the connection of two microphones, with individual level controls for each microphone input, and sum the inputs. Two-band equalisation adjustment for the mixed microphone signals shall be available on the plate in the form of tamperproof controls, and it shall be possible to enable the mixer’s music ducking facility; ii) to allow the connection of one microphone and one stereo line level input, with individual level controls for each input, and sum the inputs. Controls shall also be provided for music source selection and music level in the zone to which it is connected. It shall be possible to enable the mixer’s music ducking facility from the plate.

The mixer shall accept internal Bose® Series IIS plug-in equaliser cards to permit use with compatible Bose® loudspeakers. It shall be possible to fit these in any or all of the zone outputs.

The mixer shall be built in a 3U steel chassis for mounting in a standard 19” rack.

The mixer will be fitted with a front-panel power switch with LED indication.

Two mains supply variants shall be available: 230 V or 115 V. Mains supply shall be connected via a detachable IEC cable.

The mixers shall be the Cloud Z4 II (four output zones) and the Cloud Z8 II

(eight output zones); the optional remote control panels shall be the Cloud

RL-1 (music level only) and the Cloud RSL-6 (music level and source selection).

The optional remote input plates shall be the Cloud DM-1 (two microphone inputs) and the Cloud LM-1 (one microphone and one stereo line input).

Issue_1.1

E&OE