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METAXAS & SINS
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OPUS - enda et spektakulært design fra Kostas Metaxas
The OPUS is the direct result of an intense 35 years fascination with music recording and reproduction to perfect the most transparent,
reference calibre “monitoring” preamplifi er to complement both the fi nest domestic audio playback & professional recording systems in
Using technology borrowed from Aerospace and Formula 1, the design also reflects the extraordinary advances that have been made over the last 15 years in modelling and simulation software.
In the early 2000’s, Kostas Metaxas underwent extensive training to become one of the first designers who could conceive, model and
prototype an entire amplifier on a component by component basis in 3D.
The PCB software he uses not only lays out the boards, but also allows schematic based simulations which can test [or verify] the
PCB’s signal integrity displaying Reflection and Crosstalk Analysis.
Not content with a strict engineering approach, Metaxas started working on creating the ultimate library of test recordings using three “Metaxas-modified” portable Swiss Stellavox SM8
[10” reels @ 15ips] Analogue tape machines with Neumann [M150,
TLM50 and TLM170] and B&K [4135 and 4133] microphones to record and fi lm over 300 live acoustic concerts.
[Free Samples are available upon request]
Many of these recordings are also used today as references by many of our esteemed manufacturer colleagues.
To house this cutting-edge technology, a striking “organic” case design was 5-axis CNC machined from a solid block of Aircraft
Aluminium [or Copper or Titanium] to shield and mechanically ground the low-level signals.
All switches, attenuators and sockets/plugs [hardware] are of the highest possible quality, many meeting or exceeding millitary
This future-proof preamplifier o ers the simplest, purest signal path.
Additional “Plug-in modules’ allow almost infinite possibilities for the addition of LP phono RIAA equalized playback, microphone preamplification or Digital recording [ADC] and Playback [DAC].
In its basic format it comes with a “Mainframe” and separate AC Mains Isolated Power Supply connected by two aerospace-grade
The “Mainframe” features all the switching and attenuator pots with internal sockets to accept the following modules: Standard modules:
1. Master Out Line Stage Module [comes standard] Single-ended output.
2. Professional VU meter drive circuits.
2. Phono RIAA Stage Module Plug-ins
3. Balanced [transformer input] Microphone Preamplifier Module Plug-ins
4. 384kHz/24bit Digital to Analogue or Analogue to Digital converters.
All modules feature their own discrete voltage regulators.
MAINS ISOLATED POWER SUPPLY
The MIPS is essentially one channel of an IKARUS power amplifier
driven by an ultra-low-noise discrete sine wave oscillator at ~ 200Hz
driving the primary of an output transformer. The secondary of this
transformer generates the filtered +/-35V dual mono supply rail voltages for the discrete voltage regulators. This scheme totally isolates
the AC mains from the amplifier circuits.
FREQUENCYRESPONSE : DC - 10MHz (-3dB)
VOLTAGE OUTPUT: 15VRMS per channel into 50 Ohms with no more than 0.05% T.H.D.
SLEW RATE : Greater than 1000V/us small and large signal T.H.D. : Less than 0.005% 20Hz-20KHz
I.M.D.(S.M.P.T.E.) : Less than 0.005%
SIGNAL/NOISE : -117DBV unweighed input shorted
SENSITIVITY [Line Stage]: 26dB
INPUT IMPEDANCE : 100kOhms in parallel with 11pF
What the critics said in the past...
“ The METAXAS OPUS stretches our acoustic expectiations.
At present, it defines the standard as to how far we can travel into the music ...
and it does so with style ...”
Martin de Wulf, BOUND FOR SOUND, USA
“ So neutral though, is the Metaxas Opus/Soliloquy set up that I could have used just
about any sources I liked once the interconnecting cables were sorted. All I’d be
hearing were the individual characteristics of the source components. However neutral or ‘naked’ the sound, the MAS doesn’t come on as ‘transistory’ or clinical ... it
had a feather-light touch and a way with tiny details that suggest either a pedigreed
60W or 70W per channel tube amp of recent vintage ...”
Ken Kessler, HI FI NEWS& RECORD REVIEW, England.
“ It would make a perfect tool to assess equipment by. If any component is not in the
top league, the amps will betray the culprit with surprising honesty. Its other great strength is the speed of delivery. It can keep up with the fastes of guitar runs and tambla rolls with a speed normally associated with single-ended valve amplifiers”.
Alan Sircom, HI FI CHOICE, England.
“From this moment on, “the miracle” from Metaxas brought out high frequency
information with such clarity which was never before heard”.
Rating: Absolute Spitzenclasse, REFERENCE.
STEREOPLAY MAGAZINE, Germany.