Revox Digital LS User's Manual
Contents
1. The Philosophy of Excellence Prestige Digital pe c SS p D N 2 ua bd s swia shsiayeadspno7 aAn y eaiSiq awiaysAsiayrdoidsjne oAmnyjy earsiq REVOX The Philosophy of Excellence The absolutely new dimension of listening DIGITAL ACTIVE LOUDSPEAKERSYSTEMS 1 0 ue m 15 2 0 The Products PC Scilla S Ga ia cM 16 2 2 Prestige Digital enrica esaa guar ee ee 17 23 DEC 2 ao a HERE 18 3 0 Technical Details 3 1 Digital Active Loudspeakersystem what s that sssssssssssseeeeem meme 19 3 2 Master Slave Concept ou aee e RU eL EL ne here hd neck itid Dose Let A ao 19 3 3 What is delay compensation by means of digital technology ssssssssss 20 3 4 Negative IMpedan esiisa ies iseitis aia AS reaa E aE aa E aE trennen eere 20 3 5 Graphic to show the sound distribution at different speaker systems sssssssssss 21 3 6 Why an extensive bracing of the cabinet 2 ersennenseennenneenneenneennen nennen nennen nennen nenn 22 3 7 How works the digital volume and tone adjustement 44nsnsennnsnnnsenennnnennnen nenn nennen 22 3 8 Why several loudspeaker drivers u 20r204400nnennnnnnannnnennnnnennnnnnnnnnnenennenanennennnnnennnnnnnennen nenn 22 23 9 Monitoring of electrical and thermal paramelbis iiec une 22 4 0 The digital sources recommendations eee emen mener ener 23 14 1 0 The History Since the invention of the p2. 260 x 390 mm Ve T p view Generall data 260 mm Power supply 230 V 500 VA ca 28 kg Master ca 26 kg Slave Aluminum 17 148 mm 2 3 The interface DLC 2 The Revox DLC 2 acts as interface between digital e g CD player MD recorder or CD recorder and analogue sound sources e g FM tuner or tape deck on the one hand and the Revox digital active loudspeaker systems on the other hand For operation in conjunction with analogue devices the DLC 2 houses a state of the art analogue to digital converter that converts analogue input signals to digital format Moreover the DLC 2 controls the digital loudspeakers its integrated IR receiver passes commands to the speakers such as switch on off change in volume bass treble or balance Signals coming from digital sources are transmitted to the loudspeakers without alterations in order to avoid any loss in quality The DLC 2 does not feature any operating elements You operate the DLC 2 using the IR remote control The switches on its back panel are for adjusting to the level of the incoming analogue signals a process which you need to perform only once The LEDs on the front panel show the selected input and an overload of the analogue input and a numeric display indicates the selected volume level Power supply is ensured by the enclosed power adapter 12V DC 250 mA The DLC 2 and the Revox Exception hi fi system are two of a kind If you want the two to act as one sys
3. high quality loudspeaker drive units 2 A digital signal processor DSP by Motorola embedded in an electronic unit for all digital signal processing This DSP is responsible for filtering the signals distributing them to the individual frequency ranges and thus to the individual power amplifiers The input of the electronic unit accepts digital output signals of various sources such as a CD Player a DAT Recorder or a MD Recorder The unit automatically recognizes the sampling frequencies 32 kHz 44 1 kHz 48 kHz of the different systems and adapts accordingly 3 Three 130 watts power amplifiers in each box for driving the loudspeaker drive units As the speakers come with built in power amplifiers there is no need for additional amplifiers for operation nor for an annoying search for the right loudspeaker cables Future trends will probably be characterized by an increasing importance of digital signal sources e g DAB DVB So buying a digital active loudspeakersystem means getting ready for the digital age 3 2 Master Slave Concept In order to protect the system from external interference the digital electronic unit has been designed as tight as possible Additionally this unit is extensively shielded and mounted in only one loudspeaker For this purpose a highly complex 4 layer board which normally is exclusively found in high performance computers is used While one loudspeaker houses the digital electronic unit for b
4. e mutual influencing Top quality components ensure an optimum conditioning of the signals which are fed in their purest form to the outputs Balanced and single ended connectors act as interface to external equipment This is our top recommendation for the Digital Active Loudspeakersystems Features Top Loader Brand new Disc Drive VAM 1205 with hall motor High quality D A converter technology for outstanding sound and least possible distortion Separate power supplies for digital and analogue circuits Remote control for the whole Exception system Big LCD Display Highest quality operational amplifiers for the output stage Strictly separated path for analogue and digital signals 2 digital outputs BNC coaxial for direct digital recording Symmetrical analogue outputs Additional cinch connectors for the analogue output signal Easy functions together with the amplifier E 450 Big variety for programming Random play for all tracks on the CD Random play for the programmed tracks Autoplay after inserting the CD and pushing the close button the CD player starts playing Controllable by IR control Sheet metal chassis Bicolor aluminum housing with an outstanding design Elegance CD Player S 22 The Elegance S 22 CD player excels due to its mesmerizing sound reproduction and high quality drive The digital output which can be switched off and the bitstream digital analogue converter make t
5. es if they are of a certain degree By means of digital technology Revox is now in a position to ensure a consistent signal processing time for all frequencies When using a digital crossover network distortions which a passive or analogue active crossover network would cause are compensated for as well as delays which are due to the loudspeaker drivers To achieve this goal extensive testing and innumerable series of measurements at our lab have been necessary However we think that our efforts have been worthwhile Our Digital Active Loudspeakersystems deliver a lifelike reproduction of music i e all frequencies reach your ear simultaneously as if you were enjoying a real performance 3 4 Negative Impedance 20 Each loudspeaker driver has a copper wire voice coil which acts as an ohmic resistor Since it is a coil it also constitutes of course a complex AC resistance an inductivity Together with the diaphragm those two resistors form the so called impedance If you apply a pulse to such a voice coil the diaphragm connected to this coil is deflected into one direction and afterwards gradually decays This motion can be compared to the movement of a pendulum which has been given a push However the motion in the loudspeaker is damped by the magnet Depending on the magnet s strength the oscillation slowly or quickly ebbs away Yet this post pulse oscillation is undesirable because one pulse leads to a series of oscillations
6. he drivers to the cabinet can hardly be prevented However to avoid such vibrations stiffening ribs are optimally placed within the cabinet By implementing this admittedly slightly extreme measure we have succeeded in eliminating all vibrations 3 6 How works the digital volume and tone adjustement Digital servo components are used to set volume tone and balance They are nearly ever lasting as they do not contain any mechanical parts Furthermore they are maintenance free and very precise Moreover the intelligent software monitors and limits the volume level when the system is switched on in order to avoid an unpleasant surprise You conveniently operate the system by using an IR remote control 3 7 Why several loudspeaker drivers Due to the slim appearance and the pleasing design it is not possible to use a large woofer with an accordingly large surface of the diaphragm However to achieve similar low frequency foundation the surface of the diaphragm is divided among several separate drivers A big advantage of these relatively small woofers is that the smaller diaphragms have an increased dimensional stability Additionally special magnets reduce harmonic distortions i e the non linear distortion factor As the woofers cause air vibrations a small enclosure is built into the loudspeaker cabinet in order to protect the mid range driver from their influence A specially built driver with extremely low harmonic distortion
7. his CD player a true masterpiece which lets nothing get in the way of your perfect musical experience as it features only a few control elements logical operating procedures and simple programming Slim form factor 430 x 265 x 70 mm Vacuum fluorescent display Gold plated connectors Aluminum front panel and housing High quality components Frequency range 2 Hz 20 kHz Coaxial digital output switchable Bitstream D A converter Highly efficient error correction Switchable phase Controllable by infrared control Available in silver and black 23 REVOX SCHWEIZ Revox Schweiz AG CH 8105 Regensdorf Althardstrasse 146 Telefon 41 1 871 66 11 Fax 41 1 871 66 19 DEUTSCHLAND Revox GmbH D 78048 VS Villingen Am Krebsgraben 15 Telefon 49 7721 8704 O Fax 49 7721 8704 29 Zentralservice Revox GmbH D 78048 VS Villingen Am Krebsgraben 15 Telefon 49 7721 8704 43 Fax 49 7721 8704 49 e mai info revox de Homepage www revox ch Copyright by REVOX GmbH D 78048 VS Villingen 10 30 0347
8. honograph generations of investigators and engineers have worked to make perfect the quality of audio record and playback The power spring of these efforts is and was the dream of human beings to hold tight for ever irretrievable moments and particularly impressive musical experiences and thus to make repeatable so to say live to hear again It s the goal to capture to conserve and to maintain for the posterity the fascination of the instant underwent via our senses This fascination shall then be able to be echoed as really as possible at any time independently of location time and room The existing exhibits of painting of photography but not least of the modern technical media like movie television and video are witnesses of this desire to copy continuously these original moment bound events With the invention of digital transformation and storage of tones and sounds one has come nearer to this goal by a formidable step Revox since the foundation more than 50 years ago devoted to the storage and playback of sounds in a quality as high as possible in recent years has taken care of the limb of the chain supposed as the weakest in the most intensive and successful way the loudspeaker In long years most intensive developmental work a system has arisen which opens a completely new dimension of sound reproduction In cooperation with sound engineers from all over the world and by investments in an amount of millio
9. instead of only one which in turn strongly influences the musical reproduction It leads for example to booming bass overemphasized bass strange sound behavior of the medium and high frequencies Revox uses amplifiers with so called negative impedance for all three ways This patented method compensates for the impedance of the loudspeaker driver To balance the tolerances of the voice coils which are caused by the tolerance of the wire different winding etc each amplifier is specially adjusted to the single drivers when the loudspeaker is assembled The result of this exacting method is a precise control of the motions of the voice coil and consequently of the speaker s diaphragm A pulse does no longer give rise to many decreasing vibrations but to one single oscillation The Revox Digital Active Loudspeakersystems offer an unequalled precise reproduction of music which is reflected by full bass crisp mid range and brilliant treble Traditional loudspeaker Input signal TM Signals reach the ear at the wrong time Revox Digital Active Loudspeaker Sytems Input signal gt Signals reach the ear at the right time Graphic to show the sound distribution at different speaker systems 21 3 5 Why an extensive bracing of the cabinet The loudspeaker cabinet is very tall Moreover there are several vents for the speaker drivers on the front panel As a result transmission of vibrations from t
10. is used for the mid range The treble dome is equipped with a broadly radiating aluminum diaphragm We have paid special attention to the weight of the coil and the diaphragm and reduced their weight as much as possible 3 8 Monitoring of electrical and thermal parameters 22 At Revox the quality of the loudspeakers is permanently monitored Each Digital Active Loudspeakersystem undergoes a 14 hours burn in test before shipment To ensure that the electrical requirements are fulfilled our manufacturing department works with sophisticated computer measuring equipment And even when in operation the loudspeaker is constantly monitored The electronic unit permanently measures the temperature of the heat sink If for some reason the heat sink overheats the electronic unit shuts down automatically and a LED lights up Moreover the power fed to the loudspeakers is constantly monitored If the load is too heavy for a driver it is reduced 4 0 The digital sources recommendations Exception CD Player E 426 The E 426 CD Player is a user friendly top loader that allows you to change CDs easily and quickly As it carries latest generation Hall motor drives there are no mechanical influences while the discs are read which makes the E 426 a lifelong companion As far as signal processing is concerned we strictly separated the digital from the analogue path by employing two transformers and two power supply circuits to eliminate possibl
11. ns it has been done to create the most exact speaker With the digital active loudspeakersystems by Revox are abolished all faults hitherto well known and relevant for playback of music as well as the weaknesses of conventional active and passive speakers inherent in construction The intelligent compensations and controls are performed digitally and will enable this system to render any kind of music in an absolutely unadulterated way and in the best sense naturally By this digital signal processing Revox finally succeeded in completely compensating disturbing time delays The fact that there are no completely phase independent speaker chassis has prompted our engineers to make remedies once again The result of this extensive work is the Revox patented circuitry principle of the negative output impedance for all speakers involved which cares for correct rendering of pulses This ensures an extremely dynamic and live feeling of the music as close as possible to the original and the result is a perfect sound impression within the whole transmission range The capability of exactly tracing natural timbres of voices and instruments is the absolutely unsurpassed force of the digital active speaker systems by Revox The matter of course and the sovereignty in transforming any sound event into acoustic experience are the sources of the intrinsic fascination of these modifiers They incorruptibly neutrally and authentically transform
12. oth channels left and right as well as the power amplifiers for one side master the other speaker comes equipped with only the necessary power amplifiers for its side slave Such a concept guarantees a high degree of operational safety and excellent results 19 3 3 What is delay compensation by means of digital technology The problem is as follows Traditional passive and analogue active crossover networks lead to long frequency dependant time delays This means that the different frequencies of a piece of music leave the crossover network at different times whereas during a live performance of a music instrument all frequencies are emitted simultaneously The lower the limit frequency of the network the worse the time delay Therefore the part of the network which is responsible for the bass range introduces the longest time delay and the part responsible for the tweeter the shortest In addition so called delay distortions occur due to varying driver dimensions In a loudspeaker as in an electromagnet the voice coil is forced to move by electric current Since the tweeter is much smaller than the woofer the tweeter s voice coil is placed nearer to the front of the loudspeaker which results in an additional delay In consequence of these two delays high frequencies always reach the human ear first with conventional loudspeakers Extensive scientific tests have shown that the human ear is capable of perceiving such differenc
13. oustic experience The special and extremely complex construction of the cabinet enables us to reach these slim dimensions Speaker chassis specially developed and manufactured according to the newest speaker technology enable the Prestige Digital to reproduce all kind of music purely and naturally in best possible matter Incorruptible neutral and authentic that s the way this speaker converts the digital signals into acoustic vibrations Additionally by using extremely complex and expensive technologies in manufactur ing we can offer you brushed aluminium as the surface for this cabinet This can also be added to the fascinating charm of this modifier Technical Data Prestige Digital Acoustics 40 Hz 20 kHz 3 dB max 196 93 dB SPL 1m low reflection room min 104 dB SPL 1m 1kHz with 100 Hz wobbled low reflection room Frequency range Distortion factor Sound pressure level 390 mm Weight Cabinet surface color Subjects to change without notice Speaker chassis Bass 8 x116 mm Mid range 1x116 mm Treble dome 1x25 mm Electrical Front view Side view Tomm 270mm Audio connectors Imi Input Master Cinch digitally AES EBU SP DIFF x Output Master 4pol XLR gt Connection to Slave o Amplifier 3 x 130 W max per speaker e Features Phase linear digital filters E o Dimensions X Cabinet Height incl socket 1270 mm Widht 140 mm Depth 270 mm Socket W x h
14. re level Technical Data Scala 3 6 Acoustics Frequency range 31 Hz 20 kHz 3 dB Front view Side view Distortion max 0 996 96 dB SPL 1m low reflection room 250mm Sound pressure level min 105 dB SPL 1m 1kHz with 100 Hz wobbled low reflection room 1870 mm 0 000 Speaker chassis Bass 4 x 155 mm Mid range 1x155 mm Treble dome 1x25mm Electrical Audio connectors Input Master Cinch digitally AES EBU SP DIFF Output Master 4 pin XLR Connection to Slave Amplifier 3 x 130 watts max per speaker Special features Phase linear digital filter Dimensions Cabinet 1870 mm x 180 mm x 250 mm h front x w front x d 1910 mm x 145 mm h rear x w rear Socket 20 mm x 395 mm x 295 mm hxwxd General Data Power supply 230 volts 500 VA Weight appro 48 kg Master appro 46 kg Slave Cabinet surface colors real wood veneer cherry tree Silver metallic Other colors surfaces upon request Subject to change without notice 2 2 Anew milestone in digital Technology Prestige Digital Based on the technology we have already successfully implemented in the Scala 3 6 we have developed another highlight in the Digital Active Loudspeakersystems Even slimmer in the dimensions the Prestige Digital is equal to the big brother Scala in every way Equipped with 8 bass chassis this modifier converts the offered digital signals with the same superiority and also easily into an ac
15. tem connect the plug on the end of the DLC 2 lead back panel to any Revox link socket of the Exception hi fi system Now you can operate the DLC 2 and the digital loudspeaker system from the E 450 Exception amplifier you can change all parameters such as volume bass treble and balance from the keys on the amplifier and read the corresponding settings on its display As the DLC 2 is of modest height it can be placed directly under the E 450 where it is almost invisible Technical Data DLC 2 Front view Side view 120 mm 23 mm Top view 18 Audio Inputs Analogue 1 2 51volts 47 kohms adjustable Digital 1 Coax electrical Digital 2 TOSLINK optical Output Digital Coax electrical A D converter Harmonic distortion Signal to noise ratio Crosstalk attenuation Frequency range Analogue Dimensions Ww H D General Line voltage Power consumption Operating conditions complies with DIN 40040 Weight 24 bit Delta Sigma 0 003 3 dB FS 100 dB 90 dB 1kHz 20 Hz 20 kHz 0 3dB 120 mm 4 7 ins 23 mm 0 9 ins 148 mm 5 8 ins depends on power supply 3 4 watts maximum 10 40 C 0 45 kg 0 2 Ibs Specifications are subject to change without notice 3 0 Technical details EM Digital Active Loudspeakersystem whats that The Revox digital active loudspeakersystems consist of three parts 1 A loudspeaker box housing with specially built
16. the digital audio signals offered to them in acoustic vibrations These are characterized by unsurpassed precision and are perceived at least under living room conditions in nearly unlimited dynamics We experience the nearly perfect illusion of the original happening The circle closes The capability of experiencing again one time musical events true to the original in the own four walls has a name Revox digital active speaker systems 15 1910 mm lt 295 mm 2 0 The products 2 1 Scala3 6 Re defining high end The slim Scala 3 6 stands for legendary Swiss quality and combines refined technology with elegant timeless design Audiophiles who are tired of their flats looking like sound studios will love these speakers In short a totally new dimension of listening for you to discover You can directly connect a digital source to the Scala 3 6 as the speakers are based on digital signal processing Therefore all you need to listen to music is for example a CD player with digital output The Scala 3 6 digital loudspeaker marks the beginning of a new era in the history of perfect music reproduction Our engineers have completely eliminated system related loudspeaker faults by consistently and comprehensively implementing digital technology Each loudspeaker houses three 130 W power amplifiers and six drivers Four paralleled long throw woofers a midrange speaker and a treble dome ensure an impressive sound pressu
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