Revox Speaker Digital LS User Guide

The Philosophy of Excellence  
Scala 3.6  
Prestige Digital  
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of Switzerland  
1.0 The History  
Since the invention of the phonograph, 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 hearagain.  
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  
copycontinuously 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-yearsmost 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 millions 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 nally 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 experienceare the sources of the intrinsic fascination of these  
modiers.  
They incorruptibly, neutrally, and authentically transform 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.  
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2.0 The products  
2.1  
Scala 3.6 - Re-dening 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 ats  
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 ampliers and six drivers. Four  
paralleled long throw woofers, a midrange speaker, and a treble dome ensure  
an impressive sound pressure level.  
Technical Data - Scala 3.6  
Acoustics:  
Frequency range:  
Distortion:  
Sound pressure level:  
31 Hz - 20 kHz (-3 dB)  
max. 0.9%  
(96 dB SPL / 1m, low-reection room)  
Front view  
Side view  
250 mm  
min. 105 dB SPL (1m, 1kHz with 100 Hz wobbled, low-  
reection room)  
Speaker chassis:  
Bass  
Mid-range  
Treble dome  
4 x 155 mm  
1 x 155 mm  
1 x 25 mm  
Electrical:  
Audio connectors  
Input (Master):  
Output (Master):  
Amplier:  
Cinch, digitally: AES EBU, SP/DIFF  
4 pin. XLR > Connection to Slave  
3 x 130 watts max (per speaker)  
Phase-linear digital lter  
Special features:  
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  
( h x w x d )  
Top view  
145 mm  
General Data:  
Power supply:  
Weight:  
230 volts / 500 VA  
appro. 48 kg.( Master )  
appro. 46 kg (Slave)  
Cabinet surface, colors:  
real-wood veneer cherry tree, Silver metallic  
Other colors, surfaces upon request  
180 mm  
385 mm  
Subject to change without notice  
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2.2  
A new 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 'modier' converts the  
offered digital signals with the same superiority and also easily into an 'acoustic  
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 'modier'.  
Technical Data - Prestige Digital  
Acoustics:  
Frequency range:  
Distortion factor:  
Sound pressure level:  
40 Hz - 20 kHz (-3 dB)  
max. 1% (93 dB SPL / 1m, low-reection room)  
min. 104 dB SPL (1m,1kHz with 100 Hz wobbled, low-  
reection room)  
Speaker chassis:  
Bass  
Mid-range  
Treble dome  
8 x 116 mm  
1 x 116 mm  
1 x 25 mm  
Electrical:  
Front view  
140 mm  
Side view  
270 mm  
Audio connectors  
Input (Master):  
Output (Master):  
Amplier:  
Cinch, digitally: AES EBU, SP/DIFF  
4pol. XLR > Connection to Slave  
3 x 130 W max (per speaker)  
Phase-linear digital lters  
Features:  
Dimensions:  
Cabinet:  
Height (incl. socket):  
Widht:  
1270 mm  
140 mm  
Depth:  
270 mm  
Socket (W x h):  
260 x 390 mm  
Generall data:  
Top view  
260 mm  
Power supply:  
Weight:  
230 V / 500 VA  
ca. 28 kg (Master)  
ca. 26 kg (Slave)  
Aluminum  
Cabinet surface, color:  
Subjects to change without notice  
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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-system are two of a kind. If you want the two to  
act as one system, connect the plug on the end of the DLC-2 lead (back panel) to any Revox  
link socket of the Exception hi-system. Now, you can operate the DLC-2 and the digital  
loudspeaker system from the E 450 Exception amplier; you can change all parameters,  
such as volume, bass, treble and balance, from the keys on the amplier 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  
Audio  
Inputs:  
Analogue 1 - 2,51volts/ 47 kohms (adjustable)  
Digital 1 Coax (electrical)  
Digital 2 TOSLINK (optical)  
Output:  
Digital Coax (electrical)  
24-bit Delta-Sigma  
0.003 % (-3 dB FS)  
100 dB  
A/D converter:  
Harmonic distortion:  
Signal-to-noise-ratio:  
Crosstalk attenuation:  
Frequency range:  
Analogue  
90 dB (1kHz)  
20 Hz - 20 kHz (-0,3dB)  
Dimensions:  
W
H
D
120 mm  
23 mm  
148 mm  
4.7 ins  
0.9 ins  
5.8 ins  
Front view  
120 mm  
Side view  
COAXIAL  
OPTICAL  
A
N
A
L
O
G
General  
DLC-2  
OV  
E
RL  
O
A
D
Line voltage:  
depends on power supply  
3.4 watts (maximum)  
Power consumption:  
Operating conditions:  
(complies with DIN 40040)  
Weight  
Top view  
+10 40 °C  
0.45 kg  
0.2 lbs  
Specications are subject to change without notice.  
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3.0 Technical details  
3.1 Digital-Active Loudspeakersystem - whats' that?  
The Revox digital-active loudspeakersystems consist of three parts:  
1. A loudspeaker box housing with specially built, 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 ltering the signals,  
distributing them to the individual frequency ranges, and thus to the individual  
power ampliers. 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 ampliers in each box for driving the loudspeaker  
drive units. As the speakers come with built-in power ampliers, there is no  
need for additional ampliers 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 both channels  
left and right as well as the power ampliers for one side (master), the other  
speaker comes equipped with only the necessary power ampliers for its side  
(slave). Such a concept guarantees a high degree of operational safety and  
excellent results.  
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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 tweeters  
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 rst with conventional loudspeakers. Extensive scientic tests have shown  
that the human ear is capable of perceiving such differences 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  
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  
deected 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 magnets strength, the oscillation slowly or quickly ebbs away. Yet, this  
post-pulse oscillation is undesirable, because one pulse leads to a series of  
oscillations instead of only one, which, in turn, strongly inuences the musical  
reproduction. It leads, for example, to booming bass, overemphasized bass, strange  
sound behavior of the medium and high frequencies.  
Revox uses ampliers with so-called negative impedance for all three ways. This  
patented method compensates for the impedance of the loudspeaker driver. To  
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balance the tolerances of the voice coils, which are caused by the tolerance of  
the wire, different winding, etc., each amplier 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 speakers 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  
Signals reach the ear at the wrong time  
Revox Digital-Active Loudspeaker Sytems  
Input signal  
Signals reach the ear at the right time  
Graphic to show the sound distribution at different speaker systems  
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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  
the 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 inuence. A specially  
built driver with extremely low harmonic distortion 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  
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 fullled, 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.  
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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 inuences 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 possible mutual inuencing. 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 ampliers 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 amplier 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 this 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 uorescent 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 efcient error correction  
- Switchable phase  
- Controllable by infrared control  
- Available in silver and black  
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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 0, 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  
Copyright by REVOX GmbH, D-78048 VS-Villingen. 10.30.0347  
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