Rockna Wavelight DAC/PRE

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shahed

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Rockna Wavelight DAC/PRE
« on: 24 Jul 2020, 01:56 am »
Original owner. About 5 weeks old and lightly used. 4 years warranty. Conservatively rated. Latest R2R dac from Rockna. Hybrid ladder mode and DSD filters are in development. Analog volume control and analog input enable this DAC to be used as a preamp and simplify your system.

Asking $3949. Local pickup from NYC(10002).Otherwise buyers pays shipping and 3% paypal fee.

SOFTWARE DEFINED ARCHITECTURE & FPGA TECHNOLOGY

Wavelight DAC employs the latest Xilinx 7-series FPGA which allows us to assemble the functions of a custom high performance R2R processor. The Wavelight’s digital processing capabilities are built with complex VHDL coding and state of the art FPGA hardware. The architecture is described, in fact, by a piece of software.

When upgrading the Wavelight with new firmware, you actually change its hardware. This system allows great flexibility, obsolescence protection and lets us improve the sound of your dac by changing its internal architecture, add new, cool features, or improve the existing ones. Each digital block is custom built under the Rockna Audio high-performance standard.
Wavelight DAC

UPSAMPLING FILTERS

For the Wavelight we truly did our math and extended out testing methodology. Careful optimizations allowed us to achieve subtle nuances in listening sessions so that any listener is catered for.

Powerful, customized DSP units are performing high precision calculations in real time for studio-quality upsampling. User can choose between 4 filter modes : linear, minimum phase, hybrid mode and NOS.

RECLOCKING & D/A CONVERSION

A combination between memory buffers, digital phase-locked-loop (DPLL) and a custom input clock-decoupling scheme provides effective jitter cleaning before the conversion itself. Using the advanced Femtovox2 technique, the final result will lead to an „analog” sound without compromises.

A high precision R2R discrete ladder is performing the conversion from digital to analog domain, driven by the FPGA algorithms. The Wavelight dac is capable of operating in pure R2R mode or in a Hybrid mode ladder*. Future firmware will allow the switch at the touch of a button.

*currently in development
ANALOG SECTION & POWER SUPPLY

With 5 digital inputs and one analogue input, the unit is also capable of operating as a preamplifier. To avoid data truncation, the volume control inside the Wavelight is fully analogue, even if controlled digitally.

The analog path is fully discrete. Two toroidal power transformers allow the separation between analog and digital circuitry. A massive filtering bank capacity (over 100.000 uF) is conditioning the power supplies

Specification:

S/PDIF
24bit 44.1-192k PCM, DSD64 AES/EBU
24bit 44.1-192k PCM, DSD64
USB 32bit 44.1-384k PCM, DSD64-512
OPTICAL 24bit 44.1-176k PCM, DSD6
I2S (LVDS) 32bit 44.1-384k PCM, DSD64-512
OUTPUTS THD+N: R2R/HYBRID 0.005%/TBD
S/N ratio (0 dB): 117 dB
Dynamic range: 117 dB
Output impedance: 50 ohms
Max. out (SE/XLR): 2.4/5.8 Vrms
ANALOG INPUT THD+ (RCA) -113 db THD+N (XLR): 119 dB
Selectable Gain (RCA): 0/6/9.5 dB
Selectable Gain (XLR): 8/14/17.5 dB
HT bypass YES
Silicon technology: Xilinx Spartan 7 Dac type:
R2R 25 bit + Hybrid mode (in development)
Memory-based PLL, digital domain only: 300 fS jitter
Custom digital filters: NOS, linear, minimum and hybrid phase, 8x
Filter type: (advanced convolution) Parks-McClellan, 2.5K taps
Mathematical precision: 60 bit
Stopband attenuation:- 135 dB
Passband ripple: 0,00003 dB
Volume control: Digitally controlled ANALOG











« Last Edit: 28 Jul 2020, 08:02 pm by shahed »

mooncrikit

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Re: Rockna Wavelight DAC/PRE
« Reply #1 on: 25 Jul 2020, 06:13 pm »
Where exactly are you located? And why are you selling it? Thanx, Jeff

shahed

  • Jr. Member
  • Posts: 287
Re: Rockna Wavelight DAC/PRE
« Reply #2 on: 25 Jul 2020, 07:32 pm »
Rebuilding my system from ground up due to an upcoming move. I’m in lower Manhattan.

shahed

  • Jr. Member
  • Posts: 287
Re: Rockna Wavelight DAC/PRE
« Reply #3 on: 4 Aug 2020, 09:33 pm »
bump!