No thread for the latest ladder DAC on Head-Case
I believe it does HDCD, looks like it does it through the custom DSP filter?
Naim Audio
# Chassis: The 3mm aluminium chassis and die cast fascia provide the fundamental structural rigidity necessary for low microphony.
# Printed Circuit Boards: Six layer glass fiber PCBs optimised for low microphony and high speed data transfer.
# Analogue Filters: Two Cascaded third order Sallen-Key active filters giving 36dB/Octave roll-off. Each stage incorporates Naim zero-feedback complimentary buffers.
# I to V Converters: Convert the current output of the digital to analogue converters to a voltage waveform ready for analogue filtering.
# DAC Chips: Burr Brown PCM1704K. A true multi-bit digital to analogue converter chip as used in the CD555.
# Re-clocking Gate: Re-clocks the data immediately before it enters the DAC chips to remove any influence from the isolation circuits.
# Crystal Sine-wave Oscillators: Crystal oscillators have lower signal correlated noise and phase noise than voltage controlled clocks. The DAC employs ten separately tuned oscillators.
# DSP to Analogue Electrical Isolation: Ensures that the high frequency noise of digital electronics cannot leak into the analogue output stages.
# SHARC DSP: Operates on the digital data to filter the out-of-band artifacts. 40bit, 16 times over-sampling topology.
# Blackfin DSP: Handles USB, controls the DAC and conditions the incoming USB data.
# Data RAM: Buffers the incoming S/PDIF data stream ready for re-clocking by the appropriate crystal oscillator.
# Low Noise Power Supply: Multi-regulated and smoothed power supply with separate outputs for each element.