DSP CONTROLLED 32bit/384kHz AUDIO DAC
Maximinus uses a concept called R2R ladder. This is a resistor matrix that is switched for the various output levels delivering a fraction of an internal reference (much like a volume control). In order to bring the performance of multibit DACs to new levels a very fast and sophisticated switching logic controlling them had to be implemented. The in-house developed 1ppm precision conversion module takes advantage of the available resolution and bandwidth to present you the naked truth. (Not always a pretty picture) The result is analog tone and transparency surpassing the legendary NOS Philips or Burr Brown and modern incarnations, not to mention any of the delta-sigma converters whose tone we have all become used to. Digital filtering doesn’t like asymmetric signal, but most music is a pulsed signal, so the “digital sound” can be switched off on the Maximinus leaving the DAC artifacts to be dealt with via the natural characteristics of our silver line level output transformer.
Our suite of algorithms would apply digital filtering and upsampling to the incoming data stream for example incoming 16bit 44.1kHz CD data will be converted to 32bit 352.8kHZ data fed directly to the DAC. This greatly improves low-level resolution and the sense of space by averaging the DAC error over 8 cycles. (much like 8 dacs in parallel) The process is completely user controllable and can be bypassed for purist and non-oversampling use. Our dac module operates fully differential at 40Vp-p output to guarantee the highest signal to noise ratio. We have no reconstruction filter at the DAC output. The output transformer provides the cleanest possible output signal with ZERO feedback. while scaling the output to the accepted industry levels further reducing the DAC noise. We also use transformer or optical decoupling of all inputs, meaning that contaminated ground connection and other interfering signals from data sources don’t make it to the inside of the unit.
Clock phase noise is as important to for the sound as is dac linearity. This prompted the use of ultra low phase noise clock generators that feed dedicated re-clock logic making sure all conversion and data handling are done at the right moment. Multi-bit dacs are far less sensitive to clock jitter as the conversion is governed by the latch signal. The latch being much lower frequency than the data stream can be with lower near carrier phase noise. This reveals another lear of hidden data that dare I say is better than any analog method.
Each block in the DAC: the Converters, Clock, Input Processing and Control Logic have separate power supplies and our trademark constant current regulator technology for zero AC on the wiring. Then the whole assembly is nestled 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 DACs hence the name of a huge Roman Emperor.
- Multibit conversion
- Full Differential operation
- Shunt regulated power supplies
- 4 quadrant sign magnitude operation
- 6 Inputs
- DSD Support
- Balanced XLR and unbalanced RCA outputs
- Silver Transformer output
- No I/V conversion
- No filtering after DAC
- Total galvanic isolation of internal circuits from outside world
- Highest precision internal clocks with lowest phase noise
- Jitter removing re-clocking prior to conversion
- Dither on/off
- Selection of 4 digital filters
- Upgradable firmware
- Modular design for field upgrades
- Sealed solid aluminum enclosure
- Streaming client supporting multiple protocols
- Room ready
Power: 35W 115/230V 50/60Hz
Input formats: up to 32bit/384kHz and DSD128
Output level: 2.5V Rms
Frequency response: 20-20,000Hz +/- 1db
Signal to Noise: 130db
Output impedance: 50 Ohm