Audionet MAX Monoblock Amplifiers

Audionet


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The Über Block Busters

The at the same time diminutive and unsurpassable name of our majestic power amp reference reference MAX doesn’t just refer to the physical size of these gigantic mono block(s). But rather merrily evokes the ultimate high performance capabilities nature and our scientists – not exactly in this order – have endowed it with.

Resting on one’s laurels is a) not truly comfortable and b) not really satisfying, scientifically speaking. Actually, we do much prefer to push the boundaries of the possible again and again in order to reach better and better results with each and every attempt and generation. It’s probably genetic. The Mendel thing. A birth defect German scientists are often born with.

Our Ultimate Statement Amplifier

The MAX always plays with a both fascinating and formidable ease, stunningly elemental, tonal accuracy and with striking macro- and micro-dynamical precision. Imposing performance goes hand in hand with compelling authority, awesome musicality and technical specifications almost no-one on this planet gets close to.

Our refined amplifier-technology results in a linearity and loudspeaker control not to be found in any other piece of equipment anywhere. Distortion is kept to such a low level that it’s almost undetectable even with the most sophisticated laboratory-equipment. In a nutshell: No other amplifier has better loudspeaker control. Plus, the MAX performs so well, that it is very difficult to imagine a situation which it would not master. All this at your fingertips. And with a comprehensive user interface informing you about all going-ons on a wide format display.

Ultra-Linear-Amplifier

Our MAX mono-blocks represent Audionet’s latest internationally acclaimed ULA (Ultra-Linear-Amplifier) technology. This highly complex circuit topology, which we originally invented for medical engineering, delivers results that nudge the boundaries of what is feasible with current measuring techniques. Even under conditions of maximum strain or in other borderline situations, any incidence of signal impurity remains almost undetectable, while the outstanding feedback damping ensures that the loudspeakers crisply perform to the limits of their capacity.

The Cream of the Crop

The efficiency and precision of MAX is such that even the sound properties of components and materials are clearly audible. As a result, every sound-critical point in the MAX is exclusively fitted with the finest components obtainable worldwide, in many cases custom-made for Audionet. Equipped with a silk dielectric, our High Audiograde electrolytic capacitors come from Japan. Our low-loss capacitors are made of mica, a silicate made for us in India and China.

 

We deploy selected high-current foil capacitors with a minimal loss angle, high-quality silver-gold alloys for our internal wiring and use the very best connector systems available from our pals at Essen-based WBT, our neighbours (from a universal perspective, at least). Even the MAX’s fuses are made of – gold!

During the manufacturing process of every single mono-block, all the relevant components are re-checked again and again, meticulously measured and then perfectly matched in optimal pairs in order to guarantee optimum performance.

 

Architecture

To guarantee absolute channel separation, MAX is designed as a mono amplifier. The magnetically and capacitatively optimized assembly of the mono-blocks largely eliminates all feedback from electrical interference as well as from reciprocal influences between the amplification channels during the amplification process. The massive aluminium cabinet eradicates any effects of the dreaded subsonic noise.

In order to optimize its high-frequency attributes and velocity, we indulged in an orgy of minimalization. The signal paths have been kept to a minimum and contain no sound-impairing components such as coils, chokes or power relays.

MAX comes equipped with RCA and XLR inputs, which are electronically switched over gold-plated precision relays. The input stage is configured as a cascaded and bootstrapped differential amplifier with a low-noise, monolithic dual FET, thus electrically decoupling the end amplifiers from the input signal and avoiding harmful interaction with source. A special double cascade decouples the source signal from the driving and output stage. The driving stage linearizes distortion of the output circuit locally with a unique, cross-linked correction circuit in real time. The input and driving stage are separately powered by an oversized 80 VA toroid-core transformer with separate windings for positive and negative operating voltage.

The output stage is equipped with eight hand selected power MOSFETs with actively controlled bias current amounting to 0.6 A. The supply voltage is stabilized as rapidly as inhumanly possible by optimized discrete MOSFET regulators. To reach optimal performance, the negative and positive operating voltage is decoupled entirely. Two individual 1000-VA toroid-core transformers feed the positive and the negative half-cycles of the mains. Four special, fast and impulse-resistant high-current capacitors with a total filtering capacity amounting to 156,000 uF serve as an accumulator.

A microprocessor unit controls all functions and permanently monitors DC, HF, temperature and overload. In the case of a fault, it disconnects the MAX from the mains supply. A large, two-line display indicates fault sources in plain text. An Audionet-Link provides optical remote activation and signal-dependence in three sensitivity ranges. The control unit has a separate power supply from a transformer.

Function

Microprocessor controlled mono reference amplifier. 

Special Features

  • Audionet ULA technology (Ultra-Linear-Amplifier)
  • magnetically and capacitatively optimized construction
  • signal paths are kept to a minimum
  • no capacitors and electromechanical components in the signal path
  • completely DC coupeld
  • four separate power supplies for controller, input and driving stage and positive and negative operating voltage for the power stage
  • toroid transformer with 80 VA for the input and driving stage with separate windings for positive and negative operating voltage
  • two toroid transformer with 1000 VA for positive and negative operating voltage for the power stage
  • four impulse-stable high-current capacitors with filtering capacity totalling 156,000 uF
  • discrete, extremely fast and stable driver and output stages
  • bi-wiring terminal with two pairs of Furutech connectors
  • remote activation over Audionet Link (optical waveguide) and via input signal (3 switchable sensitivities)
  • timer
  • large-size, two-line VDF-display
  • screen saver
  • automatic mains phase detection
  • microprocessor unit controls all functions and permanently monitors DC, HF, temperature and overload

In- and Outputs

Audio inputs: 1 Furutech RCA line, gold-plated, teflon insulated
1 XLR balanced, gold-plated
Loudspeaker outputs: 2 pair Furutech 4mm-jacks, rhodium-plated
Remote activation: 2 Audionet Links, optical (in- and output)

 

echnical Data

Output: 400 W into 8 ohms
700 W into 4 ohms
1,100 W into 2 ohms
Frequency Response: 0 – 500,000 Hz (-3 dB)
Damping Factor: > 1,800 @ 10 kHz
> 10,000 @ 100 Hz
Harmonic Spectrum: k2 typ. -117 dB for 25 Watts @ 4 ohms
k3 typ. -123 dB for 25 Watts @ 4 ohms
Intermodulation: < -110 dB SMPTE 100 Hz : 20 kHz, 4 : 1, 50 W @ 4 ohms
THD + N:  < -106 dB at 1 kHz, 25 Watts to 700 Watts @ 4 ohms
SNR: > 125 dB
Input Impedance: RCA: 37 kOhm, 100 pF
XLR: 3 kOhm, 100 pF
Power Consumption: max. 2,000 W
Mains connection: 120 or 230 V, 50…60 Hz
Dimensions: width 215 mm
height 285 mm
depth 500 mm 
Weight: 38 kg/mono block

 

More information here: http://en.audionet.de/machines/max/