Sonifex Redbox RB-BL2 User Handbook Manual Download

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Manufacturers of audio & video

products for radio & TV broadcasters

Redbox

User Handbook No 3

HANDBOOK

RB-UL1

Single Stereo Unbalanced To Balanced Converters

RB-UL2

Dual Stereo UnbalancedTo Balanced Converters

RB-UL4

Quad Stereo Unbalanced To Balanced Converters

RB-LU4

Quad Stereo Balanced To Unbalanced Converter

RB-BL2

Single Bi-Directional Matching Converter

RB-BL4

Dual Stereo Bi-Directional Matching Converter

RB-PA2

Dual Stereo RIAA Phono Amplifier

RB-LI2

Stereo Line Isolation Unit

RB-PLI6

6 Way Mono Passive Line Isolation Unit

Summary of Contents for Redbox RB-BL2

Page 1: ... Stereo UnbalancedTo Balanced Converters RB UL4 Quad Stereo Unbalanced To Balanced Converters RB LU4 Quad Stereo Balanced To Unbalanced Converter RB BL2 Single Bi Directional Matching Converter RB BL4 Dual Stereo Bi Directional Matching Converter RB PA2 Dual Stereo RIAA Phono Amplifier RB LI2 Stereo Line Isolation Unit RB PLI6 6 Way Mono Passive Line Isolation Unit ...

Page 2: ...amage whatsoever arising from 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 information storage and retrieval systems for any purpose other than the purchaser s personal use without the express written permission of Sonifex Ltd Unless otherwis...

Page 3: ... Unbalanced Converter 7 Introduction 7 System Block Diagram 8 Rear Panel Connections and Operation 9 Technical Specifications RB LU4 9 5 RB BL2 Single Bi Directional Matching Converter 11 Introduction 11 System Block Diagram 11 Rear Panel Connections and Operation 12 Balanced to Unbalanced Connections 12 Unbalanced to Balanced Connections 12 Technical Specifications RB BL2 13 6 RB BL4 Dual Stereo ...

Page 4: ...Fig 4 2 RB LU4 System Block Diagram 8 Fig 4 3 RB LU4 Rear Panel 9 Fig 5 1 RB BL2 Front Panel 11 Fig 5 2 RB BL2 System Block Diagram 11 Fig 5 3 RB BL2 Rear Panel 12 Fig 6 1 RB BL4 Front Panel 14 Fig 6 2 RB BL4 System Block Diagram 14 Fig 6 3 RB BL4 Rear Panel 15 Fig 7 1 RB PA2 Front Panel 17 Fig 7 2 RB PA2 System Block Diagram For a Single Stereo Channel 17 Fig 7 3 RB PA2 Rear Panel 18 Fig 8 1 RB L...

Page 5: ...ternet www sonifex co uk Register Online for an Extended 2 Year Warranty As standard Sonifex products are supplied with a 1 year back to base warranty If you register the product online you can increase your product warranty to 2 years and we can also keep you informed of any product design improvements or modifications To register your product please go online to www sonifex co uk register Produc...

Page 6: ...roduct has been registered at the Sonifex website when the Warranty Term is 24 months from the date of despatch the Contract means the quotation these Conditions of Sale and any other document incorporated in a contract between the Company and the Purchaser This is the entire Contract between the parties relating to the subject matter hereof and may not be changed or terminated except in writing i...

Page 7: ...quest 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 con...

Page 8: ...ed to look inside the unit always disconnect the mains supply before removing the equipment covers 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 Voltage Setting Checks Ensure that the machine operating voltage is correct for your mains power supply b...

Page 9: ...the use of certain Hazardous Substances in electrical and electronic equipment RoHS The Waste Electrical and Electronic Equipment Directive WEEE aims to minimise the impacts of electrical and electronic equipment on the environment during their life times and when they become waste All products manufactured by Sonifex Ltd have the WEEE directive label placed on the case Sonifex Ltd will be happy t...

Page 10: ...ront 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 Rear Mounting a Redbox For rear panel mounting you can use either the RB RK2 in this case or RB RK3 depending on the size of your Redbox Fig B RB RK2 Small Redbox Rear Rack mount Kit Fig C RB RK3 Large Redbox Rear Rack mount Kit ...

Page 11: ... set potentiometers accessible through the rear panel A LED power indicator on the front panel displays the power supply connection System Block Diagram Fig 1 2 RB UL1 System Block Diagram Left Input Consumer Unbalanced Phono Gain Left Output Professional Balanced Right Input Consumer Unbalanced Phono Gain Right Output Professional Balanced Rear Panel Connections and Operation RCA Phono Inputs Lef...

Page 12: ...ear panel The gain range of the unbalanced to balanced converter is 15dBu to 15dBu ref 15dBu into the unbalanced input Technical Specifications RB UL1 Audio Specifications Maximum Input Level 28dBu ŶƉƵƚ ŵƉĞĚĂŶĐĞ хϭϬŬɏ KƵƚƉƵƚ ŵƉĞĚĂŶĐĞ фϱϬɏ Maximum Output Level 28dBu Distortion 0 01 THD 1kHz ref 8dB output Noise 100dB unity gain ref 8dB output Common Mode Rejection 66dB typically ƌĞƋƵĞŶĐǇ ZĞƐƉŽŶƐĞ Ϯ...

Page 13: ...set potentiometers accessible through the rear panel A LED power indicator on the front panel displays the power supply connection System Block Diagram Fig 2 2 RB UL2 System Block Diagram Rear Panel Connections and Operation RCA Phono Inputs Left and Right The stereo left and right RCA inputs are unbalanced and have an impedance ŽĨ ϭϬŬɏ dŚĞǇ ĂƌĞ ƌŽƵƚĞĚ ƚŽ ƚŚĞ ƐƚĞƌĞŽ ďĂůĂŶĐĞĚ y Z ϯ ƉŝŶ ŽƵƚƉƵƚ conne...

Page 14: ... ZĞƐƉŽŶƐĞ ϮϬ ǌ ƚŽ ϮϬŬ ǌ цϬ ϭĚ ϲϬϬɏ ůŽĂĚ ƌĞĨ ϭŬ ǌͿ Gain Range Balanced output 15dBu to 15dBu ref 15dBu into unbalanced RCA input Connections Inputs 4 x RCA phono unbalanced KƵƚƉƵƚƐ ϰ ǆ y Z ϯ ƉŝŶ ŵĂůĞ ďĂůĂŶĐĞĚͿ Mains Input Filtered IEC 110V 120V or 220 240V switchable fused 6W maximum Fuse Rating Anti surge fuse 100mA 20 x 5mm 230VAC Anti surge fuse 250mA 20 x 5mm 115VAC Equipment Type RB UL2 Dual s...

Page 15: ...set potentiometers accessible through the rear panel A LED power indicator on the front panel displays the power supply connection System Block Diagram Fig 3 2 RB UL4 System Block Diagram Rear Panel Connections and Operation RCA Phono Inputs Left and Right The stereo left and right RCA inputs are unbalanced and have an impedance ŽĨ ϭϬŬɏ dŚĞǇ ĂƌĞ ƌŽƵƚĞĚ ƚŽ ƚŚĞ ƐƚĞƌĞŽ ďĂůĂŶĐĞĚ y Z ϯ ƉŝŶ ŽƵƚƉƵƚ conne...

Page 16: ...Ϳ Gain Range Balanced output 15dBu to 15dBu ref 15dBu into unbalanced RCA input Connections Inputs 8 x RCA phono unbalanced KƵƚƉƵƚƐ ϴ ǆ y Z ϯ ƉŝŶ ŵĂůĞ ďĂůĂŶĐĞĚͿ Mains Input Filtered IEC 110V 120V or 220 240V switchable fused 6W maximum Fuse Rating Anti surge fuse 100mA 20 x 5mm 230VAC Anti surge fuse 250mA 20 x 5mm 115VAC Equipment Type RB UL4 Quad stereo unbalanced to balanced converter Physical ...

Page 17: ... levels ůů ĐŽŶŶĞĐƚŝŽŶƐ ĂƌĞ ŽŶ ƚŚĞ ƌĞĂƌ ƉĂŶĞů dŚĞ ĞŝŐŚƚ y ZͲϯ ĞůĞĐƚƌŽŶŝĐĂůůǇ ďĂůĂŶĐĞĚ ŝŶƉƵƚƐ ŚĂǀĞ ĂŶ ŝŵƉĞĚĂŶĐĞ ŽĨ ϮϬŬɏ ďƌŝĚŐŝŶŐ ĂŶĚ ĂƌĞ ƌŽƵƚĞĚ ƚŽ ĞŝŐŚƚ ƵŶďĂůĂŶĐĞĚ Z ƉŚŽŶŽ ŽƵƚƉƵƚƐ ǁŝƚŚ ĂŶ ŽƵƚƉƵƚ ŝŵƉĞĚĂŶĐĞ ŽĨ фϱϬɏ The output gain can be individually adjusted for left and right channels by using pre set potentiometers accessible through the rear panel An LED power indicator is situated on the front pa...

Page 18: ...umer Unbalanced Phono Gain Right Input 2 Professional Balanced Right Output 2 Consumer Unbalanced Phono Gain Left Input 3 Professional Balanced Left Output 3 Consumer Unbalanced Phono Gain Right Input 3 Professional Balanced Right Output 3 Consumer Unbalanced Phono Gain Left Input 4 Professional Balanced Left Output 4 Consumer Unbalanced Phono Gain Right Input 4 Professional Balanced Right Output ...

Page 19: ...pre set potentiometers which are accessible through the rear panel The gain of the balanced to unbalanced converter is variable within a range of 28dBu to 15dBu ref 15dBu into the balanced input Technical Specifications RB LU4 Audio Specifications Maximum Input Level 28dBu ŶƉƵƚ ŵƉĞĚĂŶĐĞ y ZͿ хϮϬŬɏ ďĂůĂŶĐĞĚ ďƌŝĚŐŝŶŐ KƵƚƉƵƚ ŵƉĞĚĂŶĐĞ Z Ϳ фϱϬɏ Maximum Output Level 22dBu Distortion 0 01 THD 1kHz ref 8d...

Page 20: ...250mA 20 x 5mm 115VAC Equipment Type RB LU4 Quad stereo balanced to unbalanced converter Physical Specifications Dimensions Raw 48cm W x 10 8cm D x 4 2cm H 1U 19 W x 4 3 D x 1 7 H 1U Dimensions Boxed 53cm W x 20 5cm D x 6cm H 21 W x 8 D x 2 4 H Weight Nett 1 3kg Gross 1 9kg Nett 2 9lbs Gross 4 2lbs ...

Page 21: ... ŝŵƉĞĚĂŶĐĞ ŽĨ ϭϬŬɏ ďƌŝĚŐŝŶŐ ĂŶĚ ĂƌĞ ƌŽƵƚĞĚ ƚŽ ďĂůĂŶĐĞĚ y ZͲϯ ŽƵƚƉƵƚƐ ǁŝƚŚ ĂŶ ŽƵƚƉƵƚ ŝŵƉĞĚĂŶĐĞ ŽĨ фϱϬɏ The output gain can be individually adjusted for left and right channels by using pre set potentiometers accessible through the rear panel An LED power indicator on the front panel displays the power supply connection Left Input 1 Professional Balanced Left Output 1 Consumer Unbalanced Phono Gain ...

Page 22: ...puts RCA Phono Outputs 1 Left Right These RCA phono outputs are unbalanced and have an ŽƵƚƉƵƚ ŝŵƉĞĚĂŶĐĞ ŽĨ фϱϬɏ Output Level Adjustment The output gain can be individually adjusted for left and right channels through pre set potentiometers which are accessible through the rear panel The gain of the balanced to unbalanced converter is variable within a range of 0dBu to 28dBu ref 0dBu into the balan...

Page 23: ...Ĩ ͲϭϱĚ Ƶ ŝŶƚŽ ďĂůĂŶĐĞĚ y Z ŝŶƉƵƚ Gain Range Balanced Output 15dBu to 15dBu ref 15dBu into unbalanced RCA input Connections ŶƉƵƚƐ Ϯ ǆ y Z ϯ ƉŝŶ ĨĞŵĂůĞ balanced 2 x RCA phono unbalanced KƵƚƉƵƚƐ Ϯ ǆ y Z ϯ ƉŝŶ ŵĂůĞ ďĂůĂŶĐĞĚͿ 2 x RCA phono unbalanced Mains Input Filtered IEC 110V 120V or 220 240V switchable fused 6W maximum Fuse Rating Anti surge fuse 100mA 20 x 5mm 230VAC Anti surge fuse 250mA 20 x 5m...

Page 24: ...ĂŶĐĞĚ ŝŶƉƵƚƐ ŚĂǀĞ ĂŶ ŝŵƉĞĚĂŶĐĞ ŽĨ ϮϬŬɏ ďƌŝĚŐŝŶŐ ĂŶĚ ĂƌĞ ƌŽƵƚĞĚ ƚŽ ƵŶďĂůĂŶĐĞĚ Z ƉŚŽŶŽͿ ŽƵƚƉƵƚƐ ǁŝƚŚ ĂŶ ŽƵƚƉƵƚ ŝŵƉĞĚĂŶĐĞ ŽĨ фϱϬɏ System Block Diagram Left Input 1 Professional Balanced Left Output 1 Consumer Unbalanced Phono Gain Right Input 1 Professional Balanced Left Input 2 Consumer Unbalanced Right Input 2 Consumer Unbalanced Right Output 1 Consumer Unbalanced Left Output 2 Professional Balance...

Page 25: ...ŽĨ ŶƉƵƚƐ ϭ Θ ϯ ĂƌĞ ĞůĞĐƚƌŽŶŝĐĂůůǇ ďĂůĂŶĐĞĚ ĂŶĚ ŚĂǀĞ ĂŶ ŝŵƉĞĚĂŶĐĞ ŽĨ ϮϬŬɏ ďƌŝĚŐŝŶŐ They are routed to unbalanced RCA phono outputs with an output ŝŵƉĞĚĂŶĐĞ ŽĨ фϱϬɏ ĂĐŚ y Z ŚĂƐ ƚŚĞ ĨŽůůŽǁŝŶŐ ĐŽŶŶĞĐƚŝŽŶƐ Pin 1 Screen Pin 2 Phase Pin 3 Non phase RCA Phono Outputs 1 3 Left Right These RCA phono outputs are unbalanced and have an output impedance ŽĨ фϱϬɏ Output Level Adjustment The output gain can be in...

Page 26: ...d Output 28dBu to 15dBu ƌĞĨ ͲϭϱĚ Ƶ ŝŶƚŽ ďĂůĂŶĐĞĚ y Z ŝŶƉƵƚ Gain Range Balanced Output 15dBu to 15dBu ref 15dBu into unbalanced RCA input Connections ŶƉƵƚƐ ϰ ǆ y Z ϯ ƉŝŶ ĨĞŵĂůĞ ďĂůĂŶĐĞĚͿ 4 x RCA phono unbalanced KƵƚƉƵƚƐ ϰ ǆ y Z ϯ ƉŝŶ ŵĂůĞ ďĂůĂŶĐĞĚͿ 4 x RCA phono unbalanced Mains Input Filtered IEC 110V 120V or 220 240V switchable fused 6W maximum Fuse Rating Anti surge fuse 100mA 20 x 5mm 230VAC An...

Page 27: ... the Technics SL 1200 and 1210 range of turntables Quality high specification components have been used together with low noise fast acting operational amplifiers to produce a superbly transparent signal path Additionally the RB PA2 runs without a rumble filter to produce a powerful bass response The RB PA2 is a dual stereo unit to interface up to two turntables The ŝŶƉƵƚƐ ĂƌĞ ƉŚŽŶŽ ĐŽŶŶĞĐƚŽƌƐ ǁŝƚ...

Page 28: ...фϱϬɏ dŚĞǇ ŚĂǀĞ ƚŚĞ ĨŽůůŽǁŝŶŐ ĐŽŶŶĞĐƚŝŽŶƐ Pin 1 Screen Pin 2 Phase Pin 3 Non phase RCA Phono Inputs RCA Phono Inputs Stereo Balanced Outputs Stereo Balanced Outputs Output Level Adjustments Pick up Grounding Post Pick up Grounding Post Output Level Adjustment The output gain can be individually adjusted for left and right channels through pre set potentiometers which are accessible through the rear...

Page 29: ...put Noise 77dB CCIR Q Pk 20Hz 20kHz Headroom 27dB for 3mV input Dynamic Range 90dB Connections Inputs 4 x RCA phono unbalanced KƵƚƉƵƚƐ ϰ ǆ y Z ϯ ƉŝŶ ŵĂůĞ ďĂůĂŶĐĞĚͿ Earth Tag Grounding turret tag Mains Input Filtered IEC 110V 120V or 220 240V switchable fused 6W maximum Fuse Rating Anti surge fuse 100mA 20 x 5mm 230VAC Anti surge fuse 250mA 20 x 5mm 115VAC Equipment Type RB PA2 Dual stereo phono am...

Page 30: ...ansformer which has internal jumpers allowing the outputs to be balanced about ground Gain Input Isolated Output Transformer Balanced Mode Ground Link Jumper Loop Output X2 There is also a loop through output so that the RB LI2 can be inserted into a line forming a transformer balanced distribution point This unit is useful where audio is required to be driven over a relatively long length of cabl...

Page 31: ...ich are accessible through the rear panel The gain range of the stereo line isolation unit is 15dB to 13 5dB 28 5dB Internal Jumpers The unit has jumpers that are used to balance the output about ground By default these are not fitted when the unit leaves the factory To get inside the RB LI2 first ensure that it has been disconnected from the mains power and that the mains IEC lead to the unit has...

Page 32: ... Gain Range 15dB to 13 5dB 28 5dB Connections ŶƉƵƚƐ Ϯ ǆ y Z ϯ ƉŝŶ ĨĞŵĂůĞ ƐŽůĂƚĞĚ KƵƚƉƵƚƐ Ϯ ǆ y Z ϯ ƉŝŶ ŵĂůĞ ŽŽƉ KƵƚƉƵƚƐ Ϯ ǆ y Z ϯ ƉŝŶ ŵĂůĞ Fuse Rating Anti surge fuse 100mA 20 x 5mm 230VAC Anti surge fuse 250mA 20 x 5mm 115VAC Equipment Type RB LI2 Stereo line isolation unit Physical Specifications Dimensions Raw 28cm W x 10 8cm D x 4 2cm H 1U 11 W x 4 3 D x 1 7 H 1U Dimensions Boxed 36cm W x 20 5...

Page 33: ...same supply The input and output are connected together through a transformer and the unit has internal jumpers allowing the inputs and or outputs to be balanced about ground The unit requires no mains power for operation This unit is useful where audio is required to be driven over a relatively long length of cable By isolating the signal using transformers ground loop currents that can be presen...

Page 34: ...d link Internal Jumpers The unit has jumpers that are used to balance either the input or the output about ground By default these are not fitted when the unit leaves the factory To get inside the RB PLI6 observing anti static precautions undo the four crosshead screws on the back panel at the far left and far right of the panel 2 at each end Also undo the small brass screws which hold the top and...

Page 35: ...ency Response 10Hz to 36kHz 0 5dB Connections ŶƉƵƚƐ ϲ ǆ y Z ϯ ƉŝŶ ĨĞŵĂůĞ ďĂůĂŶĐĞĚͿ KƵƚƉƵƚƐ ϲ ǆ y Z ϯ ƉŝŶ ŵĂůĞ ďĂůĂŶĐĞĚͿ Equipment Type RB PLI6 6 way mono passive line isolation unit Physical Specifications Dimensions Raw 48cm W x 10 8cm D x 4 2cm H 1U 19 W x 4 3 D x 1 7 H 1U Dimensions Boxed 53cm W x 20 5cm D x 6cm H 21 W x 8 D x 2 4 H Weight Nett 1 5kg Gross 1 9kg Nett 3 3lbs Gross 4 2lbs ...

Page 36: ...www sonifex co uk t 44 0 1933 650 700 f 44 0 1933 650 726 sales sonifex co uk ...

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