Saturday, November 16, 2013

Straussmann Holographic Music Reproduction System (HMRS)













The Control-Center CC

As its name suggests, the Control-Center serves this purpose for the entire HMRS. From the user’s viewpoint it can be compared with a preamplifier, although there is no analog signal processing, because this all takes place in the mono amplifiers.

On the other hand digital signal processing forms an integral part of the CC. All kinds of digital sources can be connected. Whether for CD or DAT drives, USB sticks or network servers, various connection facilities are provided for all kinds of tasks, interfaces and data formats. The built-in network streamer can handle all commonly used data formats with a resolution of up to 192kHz/24 Bit.

The integrated D/A converter produces a balanced analog signal from a digital music signal.

The CC is operated via a touchscreen and control knob on the unit itself, or alternatively by means of a remote control with an identical user interface. Customers can configure it themselves and adapt the unit to meet their own operating requirements. However, we can also provide a completely individual user interface on request.

The CC also monitors the operation of all other HMRS components. For example, it can identify when a tube is goimg to fail in the nearer future so that serious damages can be avoided. By taking various measurements at the start and during operation the CC is kept constantly informed about the condition of the system as a whole. With our service server we can also localize or eliminate faults online.

Specs:

Digital inputs:
SPDIF, TosLink, BNC, AES/EBU, USB, Ethernet

Analogue outputs:
1 balanced output (XLR)

Control I/O:
2 system connector for monoamplifier, 1 system connector for phono amplifier

Control elements:
Rotary knob, 7″-Touch-Screen, remote control via tablet PC

D/A-converter:
Burr-Brown multibit converter, optional patented 4-switch-D/A-converter (available 2014)

Sampling rate:
Up to 24bit/192kHz

Streamer:
UPnP digital media player

Data formats:
WAV, FLAC, ALAC, AIFF, LPCM, Ogg Vorbis, WMA, MP3

Operating power consumption:
< 60 W

Standby power consumption:
0 W

Housing:
Type of stones and surface of the metal parts can be individual customized

Dimensions (LxWxH):
300 x 400 x 350 mm

Weight:
35 kg

























The E-50 mono amplifier gives access to the world of HMRS. Its 50W of power at 8 ohms is more than sufficient for most applications.

Within the HMRS it handles all the analog signal processing, i.e. pre- and final stage amplification, switching the input channels and volume control.

The E-50 also operates DC-coupled, eliminating the need for a coupling capacitor, which can adversely affect the sound quality. This is a distinctive feature in the field of tube amplifiers.

Although we have endeavored to keep the number of components to a minimum, nevertheless we have retained the output transformer. Should a fault occur this will protect not only the loudspeakers (and possibly the user) from fatally high voltages, but also provide ideal matching of the differing impedances between the output tubes and the loudspeakers. The output can also be switched between 4 and 8 ohms. Our output transformers are made for us by a leading manufacturer to our specifications.

Our completely new method of volume control also helps to achieve our objective of outstanding sound reproduction. The very high and accurate resolution of our volume control circuitry not only allows fine level adjustment between the individual input stages but also provides automatic adjustment of the two mono output stages, with regard to the left and right stereo channel. In addition the balance can be adjusted with reference to the input channel as well as overall.

Via the system connection, the integrated electronic measuring and testing facilities supply a wide range of measurement data to the CC, enabling the internal condition of the E-50 to be checked at any time.

Specs:

Control-Center I/O:
1 system connector

Analogoue inputs:
4 balanced, 3 unbalanced, 1 balanced from the CC

Control elements:
None- all control functions operate through CC

Output power:
50W / 8 Ohms

Load impedence:
4/8 Ohms, switchable

Operating power consumption:
Approx. 250 W

Standby power consumption:
0 W

Housing:
Type of stones and surface of the metal parts can be individual customized

Dimensions (LxWxH):
300 x 400 x 350 mm

Weight:
30 kg

Warranty:
3 years, tubes 6 month; optional lifetime (full service contract)






















The MC-PHONO 2010 phono amplifier

The vinyl record is still one of the best ways to enjoy music. The quality of the music and the sound on many of the recordings made in the 50s and 60s is rarely equalled by today’s recordings. We therefore felt an obligation to develop a premium phono amplifier that could offer perfect sound reproduction from vinyl records.

The MC systems are designed to deliver only very minimal voltages. The task of the phono amplifier is to boost this by a factor of more than 10,000 in order to bring all the sound sources to virtually the same input level. It also equalizes the frequency response (the relevant standard is RIAA). In addition to the need for absolute signal fidelity, another of the major challenges was to avoid any hum or noise emanating from the amplifier (signal-to-noise ratio), to ensure that even the quietest MC systems can be ideally processed.

In principle the fact that vacuum tubes are inertia-free makes them more suitable for use in amplifiers, but very few manufacturers use them due to the level of technical expertise required. Our response to this challenge can be seen in the form of our MC-Phono 2010, a phono amplifier that has been designed as a DC differential amplifier and consequently does not require any sound-distorting capacitors in the signal path. Its balanced circuit enables external interference as well as hum and noise components to be effectively suppressed.

With an extensive range of features it offers users many options. Two MC systems can be connected to the MC-Phono 2010, and each can be configured with the most suitable terminating resistors. Settings can be made either directly on the device or via the Control-Center, or alternatively, using the connected remote control. In addition to standard RIAA equalization other additional forms of equalization are optionally available.

Like all other STRAUSSMANN audio equipment the MC-Phono 2010 is hand-made in our Berlin factory and is subjected to rigorous testing prior to dispatch. A protocol is made of all the measured values and this is supplied to the purchaser.

Specs:

Circuitry:
Internally DC-coupled tube based symmetrical diffential amplifier with MC input transformer

Inputs:
2 balanced input channels (XLR)

Output:
1 balanced output (XLR)

Control-Center I/O:
1 system connector

RIAA-equalization:
Passive, +/-0,1 %

Other equalization curves:
Optional

Gain:
Switchable 66 dB (low) / 72 dB (high)

Signal-to-noise ratio (Uin = 1mV, bandwith 20kHz):
> 90 db (A)

Operating power consumption:
< 60 W

Standby power consumption:
0 W

Housing:
Type of stones and surface of the metal parts can be individual customized

Dimensions (LxWxH):
500 x 400 x 125 mm

Weight:
35 kg

Warranty:
3 years, tubes 6 month; optional lifetime (full service contract)














One of the outstanding characteristics of the components used in our amplifiers is their ability to recreate the acoustic conditions present at the time of the recording. This is achieved in such a realistic way that listeners could imagine that the stage is in the middle of their living rooms. It is this attribute that provides the basis for the name of our range of amplifiers: the Holographic Music Reproduction System (HMRS).

As the word “system” suggests, the individual components, the Control Center CC, the mono amplifier E-50 and the phono amplifier MC-Phono 2010, form a unit that is dedicated to providing the best possible sound reproduction. Special system cables are used to link the various components. The following illustration reveals the architecture of the HMRS. Unlike the normal division into pre-amp and output amplifier, all analog signal processing (with the exception of the separate phono amplifier) takes place in the mono amplifiers, to which all the analog sources are directly connected. All the digital sources are linked with the Control Center, where they are converted into an analog signal, which is then fed to the mono amplifiers via an analog symmetrical connection. This enables us to minimize the reciprocal interference between analog and digital signal processing.

The outstanding sound quality is obtained from a combination of our chosen method of separation and the technical synergies that it produces. Together with the built-in possibilities for remote servicing, this enables us to provide music lovers with a unique system for reproducing sound from analog and digital sources.


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