Sonifex Redbox RB-BL2 Owner's manual

Brand: Sonifex

Model: Redbox RB-BL2

Category: Musical Equipment

Type: Owner's manual

Analogue Redbox

User Handbook

RB-MA1 Single microphone amplifier

RB-MA2 Dual microphone amplifier

RB-SM1 Single stereo to mono converter

RB-SM2 Dual stereo to mono converter

RB-UL1 Single unbalanced to balanced converter

RB-UL2 Dual unbalanced to balanced converter

RB-UL4 Quad unbalanced to balanced converter

RB-LU4 Quad balanced to balanced converter

RB-BL2 Single stereo bi-directional matching converter

RB-BL4 Dual stereo bi-directional matching converter

RB-SL2 Twin mono, or stereo, limiter

RB-DA6 6 way stereo distribution amplifier

RB-HD1 Stereo headphone amplifier

RB-HD6 6 way stereo headphone distribution amplifier

RB-SD1 Silence detection unit

RB-PMX4 10 input, 4 output preset mixer

RB-LI2 Stereo line isolation unit

RB-PLI6 6 way mono passive line isolation unit

RB-SS10 10 way stereo source selector/mixer

RB-LC3 3 way light/power controller

Revision 1.92 June, 2004

©Sonifex Ltd, 2000-4.

Sonifex Ltd, 61, Station Road, Irthlingborough,

Northants, NN9 5QE, England.

Tel : +44 (0)1933 650 700

Fax : +44 (0)1933 650 726

Email : [email protected] or technica[email protected]

Web : http://www.sonifex.co.uk

Information in this document is subject to change without notice and does not

represent a commitment on the part of Sonifex Ltd. Sonifex Ltd shall not be liable for

any loss or damage whatsoever arising form the use of information or any error

contained in this manual.

No part of this manual may be reproduced or transmitted in any form or by any

means, electronic or mechanical, including photocopying, recording, or information

storage and retrieval systems, for any purpose other than the purchaser's personal

use, without the express written permission of Sonifex Ltd.

Unless otherwise noted, all names of companies, products and persons contained

herein are part of a completely fictitious adaptation and are designed solely to

document the use of Sonifex products.

Contents

Redbox User Handbook

Contents

Warranty, Safety & Installation Information....................... i

Warranty Information ..........................................................i

Returning the Warranty Card ...............................................ii

Safety of Mains Operated Redbox Equipment ........................ iii

Preparing the Machine for Use.......................................... iii

Equipment Safety........................................................... iii

Voltage Setting Checks.................................................... iii

Fuse Rating ................................................................... iii

Power Cable and Connection ............................................ iii

Ordering the Correct Mains Lead.......................................iv

Installation Information...................................................... iv

Atmosphere...................................................................iv

Electromagnetic Radiation................................................iv

Fitting Redboxes..............................................................v

1. RB-MA1 Single & RB-MA2 Dual Microphone Amplifiers 1-1

1.1. Introduction.............................................................1-1

1.2. System Block Diagram...............................................1-2

1.3. Rear Panel Connections and Operation.........................1-2

1.3.1. Mic Inputs..........................................................1-3

1.3.2. Input Gain..........................................................1-3

1.3.3. Using Phantom Powered Microphones.....................1-3

1.3.4. Using the LF Filter ...............................................1-3

1.3.5. Output...............................................................1-3

1.4. Technical Specifications .............................................1-4

1.4.1. Audio Specifications.............................................1-4

1.4.2. Connections........................................................1-4

1.4.3. Equipment Type..................................................1-4

1.4.4. Physical Specifications..........................................1-4

2. RB-SM1 Single & RB-SM2 Dual Stereo To Mono Converter

……..............................................................................2-1

2.1. Introduction.............................................................2-1

2.2. System Block Diagram...............................................2-2

2.3. Rear Panel Connections and Operation.........................2-2

2.3.1. Stereo Inputs 1 (& 2)...........................................2-3

2.3.2. Mono Output 1 (& 2)............................................2-3

2.3.3. Output Gain........................................................2-3

2.4. Technical Specifications .............................................2-4

2.4.1. Audio Specifications.............................................2-4

Contents

Redbox User Handbook

2.4.2. Connections .......................................................2-4

2.4.3. Equipment Type..................................................2-4

2.4.4. Physical Specifications .........................................2-4

3. RB-UL1 Single, RB-UL2 Dual & RB-UL4 Quad Stereo

Unbalanced To Balanced Converters ...........................3-1

3.1 Introduction..............................................................3-1

3.2 System Block Diagram ...............................................3-2

3.3 Rear Panel Connections and Operation..........................3-2

3.3.1. RCA Phono Inputs (Left and Right) ........................3-3

3.3.2. Outputs (Left and Right) ......................................3-3

3.3.3. Output Level Adjustment......................................3-3

3.4 Technical Specifications..............................................3-4

3.4.1. Audio Specifications.............................................3-4

3.4.2. Connections .......................................................3-4

3.4.3. Equipment Type..................................................3-4

3.4.4. Physical Specifications .........................................3-4

4. RB-LU4 Quad Stereo Balanced To Unbalanced Converter

……..............................................................................4-1

4.1. Introduction.............................................................4-1

4.2. System Block Diagram ..............................................4-2

4.3. Rear Panel Connections and Operation.........................4-3

4.3.1. Inputs 1-4 (Left and Right) ..............................4-3

4.3.2. RCA Phono Outputs 1-4 (Left and Right) ............4-3

4.3.3. Output Level Adjustment .................................4-3

4.4. Technical Specifications.............................................4-4

4.4.1. Audio Specifications ........................................4-4

4.4.2. Connections...................................................4-4

4.4.3. Equipment Type .............................................4-4

4.4.4. Physical Specifications.....................................4-4

5. RB-BL2 Single & RB-BL4 Dual Bi-Directional Matching

Converter ....................................................................5-1

5.1. Introduction.............................................................5-1

5.2. System Block Diagram ..............................................5-2

5.3. Rear Panel Connections and Operation..........................5-3

5.3.1. Balanced to Unbalanced Connections .....................5-4

5.3.2. Unbalanced to Balanced Connections .....................5-4

5.4. Technical Specifications.............................................5-5

5.4.1. Audio Specifications.............................................5-5

5.4.2. Connections .......................................................5-5

Contents

Redbox User Handbook

5.4.3. Equipment Type..................................................5-5

5.4.4. Physical Specification...........................................5-5

6. RB-SL2 Twin Mono, or Stereo, Limiter.........................6-1

6.1. Introduction.............................................................6-1

6.2. System Block Diagram...............................................6-2

6.3. Rear Panel Connections and Operation.........................6-3

6.3.1. Outputs .............................................................6-3

6.3.2. Inputs ...............................................................6-3

6.3.3. Gain..................................................................6-3

6.3.4. Mode.................................................................6-3

6.4. Technical Specifications .............................................6-4

6.4.1. Audio Specifications.............................................6-4

6.4.2. Connections........................................................6-4

6.4.3. Equipment Type..................................................6-4

6.4.4. Physical Specifications..........................................6-4

7. RB-DA6 6 Way Stereo Distribution Amplifier...............7-1

7.1. Introduction.............................................................7-1

7.2. System Block Diagram...............................................7-2

7.3. Rear Panel Connections and Operation.........................7-3

7.3.1. Inputs (Left and Right).........................................7-3

7.3.2. Stereo Outputs 1-6 (Mono Outputs 1-12)................7-3

7.4. Front Panel Connections and Controls ...........................7-3

7.4.1. Input Gain Control...............................................7-3

7.4.2. Stereo/Mono Operation ........................................7-4

7.5. Technical Specifications .............................................7-4

7.5.1. Audio Specifications.............................................7-4

7.5.2. Connections........................................................7-4

7.5.3. Equipment Type..................................................7-4

7.5.4. Physical Specifications..........................................7-4

8. RB-HD1 Stereo Headphone Amplifier ..........................8-1

8.1. Introduction.............................................................8-1

8.2. System Block Diagram...............................................8-2

8.3. Front Panel Connections and Controls..........................8-2

8.3.1. Stereo Outputs 1-2 (Mono Outputs1-2) ..................8-2

8.3.2. Volume Level Control...........................................8-2

8.4. Rear Panel Connections and Operation.........................8-3

8.4.1. Stereo Input (Left and Right)................................8-3

8.4.2. Mono Mix Input...................................................8-3

8.4.3. Stereo/Mono Operation ........................................8-3

Contents

Redbox User Handbook

8.4.4. Local/Remote Control Operation............................8-3

8.4.5. Remote Connector...............................................8-4

8.5. Technical Specifications.............................................8-4

8.5.1. Audio Specifications.............................................8-4

8.5.2. Connections .......................................................8-4

8.5.3. Equipment Type..................................................8-4

8.5.4. Physical Specifications .........................................8-4

9. RB-HD6 6 Way Stereo Headphone Distribution Amplifier

……..............................................................................9-1

9.1. Introduction.............................................................9-1

9.2. System Block Diagram ..............................................9-2

9.3. Rear Panel Connections and Operation.........................9-3

9.3.1. Stereo Input (Left and Right)................................9-3

9.3.2. Stereo/Mono Operation........................................9-3

9.3.3. Channel Insertion Inputs or Parallel Outputs ...........9-3

9.4. Front Panel Connections and Controls..........................9-5

9.4.1. Stereo Outputs 1-6 (Mono Outputs 1-6) .................9-5

9.4.2. Master Level Control............................................9-5

9.4.3. Channel Volume Controls .....................................9-5

9.5. Technical Specifications.............................................9-6

9.5.1. Audio Specifications.............................................9-6

9.5.2. Connections .......................................................9-6

9.5.3. Equipment Type..................................................9-6

9.5.4. Physical Specifications .........................................9-6

10. RB-SD1 Silence Detection Unit ................................10-1

10.1. Introduction.........................................................10-1

10.2. System Block Diagram...........................................10-2

10.3. Rear Panel Connections and Operation....................... 10-3

10.3.1. A/B Inputs (Left and Right)..............................10-3

10.3.2. Outputs .........................................................10-3

10.3.3. Level Control .................................................. 10-3

10.3.4. Time Control................................................... 10-3

10.3.5. Mode Dip Switch Settings ................................. 10-4

10.3.6. Remotes Connector .........................................10-5

10.4. Front Panel Selectors and Indicators..........................10-6

10.4.1. Source Select and Indicator .............................. 10-6

10.4.2. Mode Selector and Indicator.............................. 10-6

10.4.3. Main and Aux indicators ...................................10-7

10.4.4. Alarm Indicator............................................... 10-7

Contents

Redbox User Handbook

10.4.5. Restore Button................................................10-7

10.4.6. Additional Modes .............................................10-7

10.5. Technical Specifications .........................................10-9

10.5.1. Audio Specifications.........................................10-9

10.5.2. Connections and Rear Panel Controls..................10-9

10.5.3. Front Panel Controls and Indicators....................10-9

10.5.4. Equipment Type ..............................................10-9

10.5.5. Physical Specifications......................................10-9

11. RB-PMX4 10 Input, 4 Output Analogue Preset Mixer11-1

11.1. Introduction.........................................................11-1

11.2. System Block Diagram...........................................11-2

11.3. Rear Panel Connections and Operation.....................11-3

11.3.1. Inputs 1-10 ....................................................11-3

11.3.2. Outputs 1-4....................................................11-3

11.4. Front Panel Controls..............................................11-3

11.4.1. Switch Banks ..................................................11-3

11.4.2. Input Gain Controls..........................................11-4

11.5. Technical Specifications .........................................11-4

11.5.1. Audio Specifications.........................................11-4

11.5.2. Connections....................................................11-4

11.5.3. Equipment Type ..............................................11-4

11.5.4. Physical Specifications......................................11-4

12. RB-LI2 Stereo Line Isolation Unit............................12-1

12.1. Introduction.........................................................12-1

12.2. System Block Diagram...........................................12-1

12.3. Rear Panel Connections and Operation.....................12-2

12.3.1. Inputs............................................................12-2

12.3.2. Isolated Outputs..............................................12-2

12.3.3. Loop Outputs..................................................12-2

12.3.4. Output Level Adjustment..................................12-3

12.3.5. Internal Jumpers .............................................12-3

12.4. Technical Specifications .........................................12-4

12.4.1. Audio Specification ..........................................12-4

12.4.2. Connections....................................................12-4

12.4.3. Equipment Type ..............................................12-4

12.4.4. Physical Specifications......................................12-4

13. RB-PLI6 6 Way Mono Passive Line Isolation Unit ....13-1

13.1. Introduction.........................................................13-1

13.2. System Block Diagram...........................................13-1

Contents

Redbox User Handbook

13.3. Rear Panel Connections and Operation.....................13-2

13.3.1. Inputs............................................................ 13-2

13.3.2. Outputs .........................................................13-2

13.3.3. Ground-link Internal Jumpers............................ 13-3

13.4. Technical Specifications .........................................13-4

13.4.1. Audio Specification ..........................................13-4

13.4.2. Connections.................................................... 13-4

13.4.3. Equipment Type..............................................13-4

13.4.4. Physical Specifications...................................... 13-4

14. RB-SS10 10 Way Stereo Analogue Source Selector/Mixer

……............................................................................14-1

14.1. Introduction........................................................... 14-1

14.2. System Block Diagram...........................................14-2

14.3. Front Panel Indicators & Controls ............................ 14-3

14.3.1. Illuminated Push Buttons.................................. 14-3

14.3.2. Front Panel Gain Controls ................................. 14-3

14.3.3. Headphone Output ..........................................14-3

14.3.4. Volume Control ...............................................14-3

14.4. Rear Panel Connections and Operation.....................14-4

14.4.1. Inputs............................................................ 14-4

14.4.2. Outputs .........................................................14-4

14.4.3. Altering the Master Output Level........................14-4

14.4.4. RB-SS10 Additional Audio Input Connectors........ 14-5

14.4.5. RB-SS10 Remote Start I/O ............................... 14-6

14.4.6. Remote Select/Switch Inputs ............................14-7

14.4.7. Status Outputs................................................14-7

14.5. Technical Specifications .........................................14-9

14.5.1. Audio Specifications.........................................14-9

14.5.2. Connections.................................................... 14-9

14.5.3. Equipment Type..............................................14-9

14.5.4. Physical Specifications...................................... 14-9

15. RB-LC3 3 Way Light/Power Controller ....................15-1

15.1. Introduction.........................................................15-1

15.2. System Block Diagram...........................................15-2

15.3. Rear Panel Connections and Operation.....................15-3

15.3.1. Switched Mains Outputs ................................... 15-3

15.3.2. Telephone Connections.....................................15-3

15.3.3. Remote External Control Inputs.........................15-3

15.3.4. Configuration Switches..................................... 15-4

Contents

Redbox User Handbook

15.3.5. Flash Rate Preset Potentiometer ........................15-6

15.4. Technical Specifications .........................................15-7

15.4.1. Connections....................................................15-7

15.4.2. Equipment Type ..............................................15-7

15.4.3. Physical Specifications......................................15-7

16. Glossary ..................................................................16-1

17. Connectors And Cabling ........................................17-1

17.1. XLR 3 Pin Connectors..........................................17-1

17.2. RCA Phono Connectors........................................17-1

17.3. ¼” Jack Connector .............................................17-2

17.4. D-Type Connector ..............................................17-2

Index ……......................................................................... I-1

Contents

Redbox User Handbook

Figures

Fig W-1: Mains Lead Table ................................................. iv

Fig W-2: RB-RK1(B) Small Redbox Front Rack-mount Kit.........v

Fig W-3: RB-RK2 Small Redbox Rear Rack-mount Kit ..............v

Fig W-4: RB-RK3 Large Redbox Rear Rack-mount Kit..............v

Fig 1-1: RB-MA1 & RB-MA2 Front Panel..............................1-1

Fig 1-2: RB-MA1 & RB-MA2 Block Diagram Single Channel....1-2

Fig 1-3: RB-MA1 Rear Panel..............................................1-2

Fig 1-4: RB-MA2 Rear Panel..............................................1-2

Fig 2-1: RB-SM1 & RB-SM2 Front Panel..............................2-1

Fig 2-2: RB-SM1 & RB-SM2 Block Diagram Single Channel....2-2

Fig 2-3: RB-SM1 Rear Panel..............................................2-2

Fig 2-4: RB-SM2 Rear Panel..............................................2-2

Fig 3-1: RB-UL1 & RB-UL2 Front Panel...............................3-1

Fig 3-2: RB-UL4 Front Panel .............................................3-1

Fig 3-3: RB-UL1 Block Diagram For a Single Channel ...........3-2

Fig 3-4: RB-UL1 Rear Panel ..............................................3-2

Fig 3-5: RB-UL2 Rear Panel ..............................................3-2

Fig 3-6: RB-UL4 Rear Panel ..............................................3-3

Fig 4-1: RB-LU4 Front Panel .............................................4-1

Fig 4-2: RB-LU4 Block Diagram.........................................4-2

Fig 4-3: RB-LU4 Rear Panel ..............................................4-3

Fig 5-1: RB-BL2 Front Panel .............................................5-1

Fig 5-2: RB-BL4 Front Panel .............................................5-1

Fig 5-3: RB-BL2 Block Diagram Single Stereo Channel..........5-2

Fig 5-4: RB-BL2 Rear Panel ..............................................5-3

Fig 5-5: RB-BL4 Rear Panel ..............................................5-3

Fig 6-1: RB-SL2 Front Panel .............................................6-1

Fig 6-2: RB-SL2 Block Diagram.........................................6-2

Fig 6-3: RB-SL2 Rear Panel ..............................................6-3

Fig 7-1: RB-DA6 Front Panel.............................................7-1

Fig 7-2: RB-DA6 Block Diagram ........................................7-2

Fig 7-3: RB-DA6 Rear Panel..............................................7-3

Fig 7-4: RB-DA6 Front Panel.............................................7-3

Fig 8-1: RB-HD1 Front Panel.............................................8-1

Fig 8-2: RB-HD1 Block Diagram ........................................8-2

Fig 8-3: RB-HD1 Front Panel.............................................8-2

Fig 8-4: RB-HD1 Rear Panel..............................................8-3

Fig 8-5 RB-HD1 Remote Connector....................................8-4

Contents

Redbox User Handbook

Fig 9-1: RB-HD6 Front Panel.............................................9-1

Fig 9-2: RB-HD6 Block Diagram ........................................9-2

Fig 9-3: RB-HD6 Rear Panel..............................................9-3

Fig 9-4: RB-HD6 Front Panel.............................................9-5

Fig 10-1: RB-SD1 Front Panel .........................................10-1

Fig 10-2: RB-SD1 Block Diagram.....................................10-2

Fig 10-3: RB-SD1 Rear Panel..........................................10-3

Fig 10-4: RB-SD1 Front Panel .........................................10-6

Fig 11-1: RB-PMX4 Front Panel .......................................11-1

Fig 11-2: RB-PMX4 Block Diagram...................................11-2

Fig 11-3: RB-PMX4 Rear Panel ........................................11-3

Fig 11-4: RB-PMX4 Front Panel Controls...........................11-3

Fig 12-1: RB-LI2 Front Panel...........................................12-1

Fig 12-2: RB-LI2 System Block Diagram...........................12-1

Fig 12-3: RB-LI2 Rear Panel ..........................................12-2

Fig 12-4: Jumper Positions on the RB-LI2 PCB...................12-3

Fig 13-1: RB-PLI6 Front Panel.........................................13-1

Fig 13-2: RB-PLI6 System Block Diagram .........................13-1

Fig 13-3: RB-PLI6 Rear Panel..........................................13-2

Fig 13-4: RB-PLI6 Ground-link Jumper Settings.................13-3

Fig 14-1: RB-SS10 Front Panel........................................14-1

Fig 14-2: RB-SS10 System Block Diagram........................14-2

Fig 14-3: RB-SS10 Front Panel........................................14-3

Fig 14-4 : RB-SS10 Rear Panel........................................14-4

Fig 14-5: Analogue Audio Inputs Pin Connections...............14-5

Fig 14-6: Remote Start Pin Connections ...........................14-6

Fig 14-7: Connection Example ........................................14-6

Fig 14-8: Remote Select/Switch Input Connections ............14-7

Fig 14-9: Connection Example ........................................14-7

Fig 14-10: Status Output Pin Connections.........................14-8

Fig 14-11: Connection Example.......................................14-8

Fig 15-1: RB-LC3 Front Panel..........................................15-1

Fig 15-2: RB-LC3 Block Diagram .....................................15-2

Fig 15-3: RB-LC3 Rear Panel...........................................15-3

Fig 15-4: Output 1 Configuration Setting..........................15-4

Fig 15-5: Output 2 Configuration Settings.........................15-5

Fig 15-6: Output 3 Configuration Settings.........................15-6

Fig 17-1 : XLR Connectors..............................................17-1

Fig 17-2 : RCA Phono Connector .....................................17-1

Contents

Redbox User Handbook

Fig 17-3 : ¼” Jack Connector..........................................17-2

Fig 17-4 : 25 Way D-Type Connectors..............................17-2

Fig 17-5 : 15 Way D-Type Connectors..............................17-2

Warranty, Safety & Installation Information

Redbox User Handbook i

Warranty, Safety & Installation Information

Warranty Information

Warranty and Liability - important the purchaser is advised to read this

clause.

(a) The Company agrees to repair or (at its discretion) replace Goods which are found

to be defective (fair wear and tear excepted) and which are returned to the Company

within 12 months of the date of despatch provided that each of the following are

satisfied:

(i) Notification of any defect is given to the Company immediately upon its becoming

apparent to the Purchaser;

(ii) The Goods have only been operated under normal operating conditions and have

only been subject to normal use (and in particular the Goods must have been

correctly connected and must not have been subject to high voltage or to ionising

radiation and must not have been used contrary to the Company's technical

recommendations);

(iii) The Goods are returned to the Company's premises at the Purchaser's expense;

(iv) Any Goods or parts of Goods replaced shall become the property of the Company;

(v) No work whatsoever (other than normal and proper maintenance) has been

carried out to the Goods or any part of the Goods without the Company's prior written

consent;

(vi) The defect has not arisen from a design made, furnished or specified by the

Purchaser;

(vii) The Goods have been assembled or incorporated into other goods only in

accordance with any instructions issued by the Company;

(viii) The defect has not arisen from a design modified by the Purchaser;

(ix) The defect has not arisen from an item manufactured by a person other than the

Company. In respect of any item manufactured by a person other than the Company,

the Purchaser shall only be entitled to the benefit of any warranty or guarantee

provided by such manufacturer to the Company.

(b) In respect of computer software supplied by the Company the Company does not

warrant that the use of the software will be uninterrupted or error free.

(i) For death or personal injury to the extent that it results from the negligence of the

Company, it’s employees (whilst in the course of their employment) or its agents (in

the course of the agency);

(ii) For any breach by the Company of any statutory undertaking as to title, quiet

possession and freedom from encumbrance.

(d) Subject to conditions (a) and (c) from the time of despatch of the Goods from the

Company's premises the Purchaser shall be responsible for any defect in the Goods or

loss, damage, nuisance or interference whatsoever consequential economic or

otherwise or wastage of material resulting from or caused by or to the Goods. In

particular the Company shall not be liable for any loss of profits or other economic

losses. The Company accordingly excludes all liability for the same.

Warranty, Safety & Installation Information

ii Redbox User Handbook

(e) At the request and expense of the Purchaser the Company will test the Goods to

ascertain performance levels and provide a report of the results of that test.

The report will be accurate at the time of the test, to the best of the belief and

Knowledge of the Company, and the Company accepts no liability in respect of its

accuracy beyond that set out in Condition (a).

(f) Subject to Condition (e) no representation, condition, warranty or other term,

express or implied (by statute or otherwise) is given by the Company that the Goods

are of any particular quality or standard or will enable the Purchaser to attain any

particular performance or result, or will be suitable for any particular purpose or use

under specific conditions or will provide any particular capacity, notwithstanding that

the requirement for such performance, result or capacity or that such particular

purpose or conditions may have been known (or ought to have been known) to the

Company, its employees or agents.

(g)(i) To the extent that the Company is held legally liable to the Purchaser for any

single breach of contract, tort, representation or other act or default, the Company's

liability for the same shall not exceed the Price of the Goods.

(ii) The restriction of liability in Condition (g)(i) shall not apply to any liability

accepted by the Seller in Condition (c).

(h) Where the Goods are sold under a consumer transaction (as defined by the

Consumer Transactions (Restrictions on Statements) Order 1976) the statutory rights

of the Purchaser are not affected by these Conditions of Sale.

Returning the Warranty Card

In order to register the date of purchase so that we can keep you informed of any

design improvements or modifications, it is important to complete the warranty

registration document that is enclosed and return it to Sonifex Ltd in the UK.

For your own records you should write down the type of machine and the serial

number (which can be found on the rear panel of the Redbox).

Redbox Type

RB-……………………………………

Serial Number

RB………………………………………

Warranty, Safety & Installation Information

Redbox User Handbook iii

Safety of Mains Operated Redbox Equipment

Preparing the Machine for Use

Each Redbox is shipped in protective packaging and should be inspected for damage

before use. Where an item is found to have transit damage, notify your supplier

immediately with all the relevant details of the shipment. Packing materials should be

kept for inspection.

Equipment Safety

This equipment has been designed to meet the safety regulations currently advised in

the country of purchase.

The power cable supplied carries an EARTH conductor, which is connected internally to

the equipment chassis ground. This connection through a properly wired power

connector is essential for safe operation. Disconnection of this earth connection may

render the equipment unsafe, with a consequential possible electrical shock hazard

from exposed metallic parts.

This equipment will operate in a horizontal position and conforms to the

safety regulations specified by use of the CE Mark.

Warning: There are no user serviceably parts inside the machine. If you

should ever need to look inside the unit, always disconnect the mains supply

before removing the equipment covers.

Voltage Setting Checks

Ensure that the machine operating voltage is correct for your mains power supply by

checking the box in which your Redbox was supplied. The voltage is shown on the box

label. The available voltage settings are 115V, or 230V. Please note that the majority

of the Redboxes are switchable between 115V and 230V.

Fuse Rating

The Redboxes are supplied with a single fuse in the live conducting path of the power

infeed at the power supply. For reasons of safety it is important that the correct rating

and type of fuse is used. Incorrectly rated fuses could present a possible fire hazard,

under equipment fault conditions. The fuse ratings for the Redboxes are: -

Voltage Fuse

115 V 200mA, 5 x 20mm SB

230 V 100mA, 5 x 20mm SB

Power Cable and Connection

An IEC power connector is supplied with the Redbox, which has a moulded plug,

attached – this is a legal requirement. If no moulded plug has been supplied with

Warranty, Safety & Installation Information

iv Redbox User Handbook

Your Redbox, please contact your supplier, because an IEC connector is always

supplied from the Sonifex factory. If for any reason, you need to use the Redbox with

a different power cable, you should use the following wiring guidelines:

Wire Colour Connection

Green, or green and yellow Earth (E)

Blue, or Black Neutral (N)

Brown, or Red Live (L)

Ordering the Correct Mains Lead

When ordering a Redbox from Sonifex, it is helpful if you can specify your required

operating voltage and mains lead. After the product code add:

UK, for 230V, UK 3 pin to IEC lead

EC, for 230V, European Schuko 2 pin to IEC lead

US, for 115V, 3 pin to IEC lead

AU for 230V, Australasian 3 pin to IEC lead

Fig W-1: Mains Lead Table

E.g. order RB-BL2 UK for a UK IEC lead to be supplied.

Installation Information

Atmosphere

The units should be installed in an area that is not subject to excessive temperature

variation (<0°C, >50°C), moisture, dust or vibration.

Electromagnetic Radiation

The cover is connected to earth by means of the fixing screws. It is essential to

maintain this earth ground connection to ensure a safe operating environment and

provide electromagnetic shielding.

Please note that due to the large gain range of the RB-MA1/MA2 microphone

amplifiers, there can be a degradation of the audio signal if used near to sources of

intense electromagnetic radiation (e.g. video monitors and power cables).

Warranty, Safety & Installation Information

Redbox User Handbook v

Fitting Redboxes

Redboxes can be fixed to the underside of a mixing desk, or other surfaces using 2 off

No. 6 countersink screws.

They can also be rack-mounted, with either the front, or rear of the Redbox

positioned at the front of the rack:

Front Mounting Redboxes: For rack mounting smaller (28cm) units the optional

RB-RK1 (Red) or RB-RK1B (Black) kit can be used (which include 4 off M6 panel

fixing screws).

Fig W-2: RB-RK1(B) Small Redbox Front Rack-mount Kit

Rear Mounting Redboxes: For rear panel mounting you can use either the RB-RK2,

or RB-RK3, depending on the size of your Redbox.

RB-RK2 1U rear panel rack kit for small Redbox range, e.g., RB-BL2

Fig W-3: RB-RK2 Small Redbox Rear Rack-mount Kit

e.g. for fitting an RB-BL2:

RB-RK3 1U rear panel rack kit for large Redbox range, e.g., RB-DA6

Fig W-4: RB-RK3 Large Redbox Rear Rack-mount Kit

e.g. for fitting an RB-DA6:

Warranty, Safety & Installation Information

vi Redbox User Handbook

Wherever you see this symbol an RB-RK1 front panel rack kit can be used :

Wherever you see this symbol an RB-RK2 small Redbox rear panel 19” rack kit can be

used :

Wherever you see this symbol an RB-RK3 large Redbox rear panel 19” rack kit can be

used :

Note: When fitting the rear-mounting rack-kits, a notch has been left on the

inside of the right-hand rack-piece for the mains cable to pass through. Make

sure that the mains cable has been put through the notch before attaching

the right hand rack-piece.

Chapter 1 - RB-MA1 Single & RB-MA2 Dual Microphone Amplifiers

Redbox User Handbook 1-1

1. RB-MA1 Single & RB-MA2 Dual

Microphone Amplifiers

1.1. Introduction

Fig 1-1: RB-MA1 & RB-MA2 Front Panel

The RB-MA1 consists of an independent low-noise microphone pre-amplifier for

converting microphone level signals to line level, or for driving long lines from

microphones to mixing equipment. The RB-MA2 dual microphone amplifier consists of

two low noise pre amplifiers.

All connections and controls are on the rear panel. The microphone input is XLR-3

type and is electronically balanced. The input gain can be adjusted individually by a

recessed pre-set potentiometer.

The XLR-3 line output is electronically balanced and can be wired unbalanced by

grounding the non-phase signal, allowing you to feed both balanced and unbalanced

equipment.

For each channel there are independent switches to control a high pass filter (low

frequency roll-off at 125Hz) and to provide phantom power at +48V to the connected

microphone. An LED power indicator on the front panel displays the power supply

connection.

The rest of this chapter will refer to both RB-MA1 and RB-MA2 unless stated

otherwise.

Chapter 1 - RB-MA1 Single & RB-MA2 Dual Microphone Amplifiers

1-2 Redbox User Handbook

1.2. System Block Diagram

Fig 1-2: RB-MA1 & RB-MA2 Block Diagram Single Channel

1.3. Rear Panel Connections and Operation

Fig 1-3: RB-MA1 Rear Panel

Fig 1-4: RB-MA2 Rear Panel

Balanced

Microphone

Input

Professional

balanced output

Gain

Phantom

power

(48V)

48V

Phantom supply on/off

Ultra low noise

high gain

amplifier

L.F. Filter in/out

L.F.

filter

Disconnect the mains supply before removing the equipment covers.

OUTPUT

PHANTOM

POWER ON

LF FILTER ON

MIC INPUT

GAIN

This product must be earthed

115V - 230V

1.3.1

1.3.2

1.3.4 1.3.5

1.3.3

Disconnect the mains supply before removing the equipment covers.

OUTPUT 2

INPUT 2

LF FILTER

OUTPUT 1

PHANTOM

POWER

INPUT 1 INPUT 2

INPUT 1

LF FILTER

GAIN

MIC INPUT 2MIC INPUT 1

GAIN

This product must be earthed

115V - 230V

1.3.1

1.3.2

1.3.4 1.3.5

1.3.3

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Sonifex Redbox RB-BL2 Owner's manual

Brand: Sonifex

Model: Redbox RB-BL2

Category: Musical Equipment

Type: Owner's manual

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Sonifex Redbox RB-BL2 Owner's manual

Sonifex Redbox RB-BL2 Owner's manual

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Son­ifex Redbox RB-BL2 Owner's manual

Son­ifex Redbox RB-BL2 Owner's manual

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Sonifex Redbox RB-BL2 Owner's manual

Sonifex Redbox RB-BL2 Owner's manual