Maximinus Universal DSP controlled discrete resistor ladder
32bit/384kHz audio DAC
This is the original multibit DAC concept with the most sophisticated implementation and highest precision.
We based the solution on the best technology available and applied our knowledge and experience taking the design to the extreme.
Maximinus features
  • Multibit conversion
  • 25 bit resolution
  • 4 quadrant sign magnitude operation
  • 8 inputs (6 +2 optional)
  • Balanced outputs on RCA or XLR (selectable)
  • Transformer output
  • No I/V conversion
  • No filtering after DAC
  • Total galvanic isolation of internal circuits from outside world
  • Operates at 32bit/384khz
  • Internal clock generators
  • Selectable recklocking
  • Selectable upsampling
  • Selection of 4 digital filters
  • Firmware upgradable
  • modular design for field upgrades
  • 32/384 Asynchronous USB interface (option)
  • Sealed solid aluminium enclosure
  • Maximinus uses a concept called R2R ladder. This is a resistor matrix that is switched for the various output levels outputting a fraction of an internal reference (much like a volume control).

    In order to bring the performance of multibit DAC's to new levels the only solution is to build them from discrete components as there are no off the shelf chips good enough. This involves the selection of ultra precision resistors, thermally coupling them and building a very fast and sophisticated switching logic to control them. The result is an order of magnitude better performance than what was achieved by legacy NOS Philips or Burr Brown chips. We use a custom 1ppm precision conversion module.

    To take advantage of the available resolution and bandwidth we had to implement a state of the art digital pre-processing. This is a suite of algorithms that would apply digital filtering and up sampling to the incoming data stream.

    After processing a 16bit 44.1kHz CD data stream it is converted to 32bit 352.8kHZ data fed directly to the DAC. This greatly improves low-level resolution and the sense of space. The process is all user controllable and defeatable for purist and non-oversampling use.

    Apart from taking the uncompromising approach of using discrete ladder technology we have taken exceptional care with the construction and operation of each circuit within the DAC and to make your investment future proof for new technology development we have provided 2 internal slots for options to be used when the time calls for it.

    We have no reconstruction filter at the DAC output providing the cleanest possible output signal. We use a transformer matching the impedance of the converter resistors to the outside world and isolating them from external influence.
    We use transformer or optical decoupling of all inputs and outputs, meaning that contaminated ground connection and other interfering signals don't make it to the inside of the unit. Each block in the DAC: the Converters, Clock, DSP and Control logic have floating ground planes and our unique constant current regulator technology. Then the whole assembly is mounted in a solid aluminum case for vibration damping and EMI/RFI screening following the same construction concept as our preamplifiers.

    It's a different league from all currently available high end DAC's hence the name of a Roman Emperor.
    TECHNICAL SPECIFICATIONS Inputs 2 x COAX (RCA) connectors Limited to 384 kHz, 24 bit data 2 x AES/EBU (XLR) connectors 2 x TOSLINK (optic) connectors
    This format has limited bandwidth and works
    for maximum sample rates of 192 kHz
    1 x USB (optional) Outputs 1 pair unbalanced RCA connectors 1 pair balanced XLR connectors
    Power supply 115 or 230V Power consumption 30W Dimensions WxDxH - 432x400x120 mm Weight 12Kg
    AVAILABLE FINISHES Silver Anodized Aluminum Black Anodized Aluminum
    DOWNLOADS Declaration of Conformity Operating Manual Maximinus Brochure Thrax Brochure
    251 Okolovrasten Pat, Delta Center | 1766 Sofia | Bulgaria | Telephone: +359 2 988 95 55 | E-mail: sales@thraxaudio.com