Audio Note Kits ANK DAC4.1x NOS Digital to Analog Converter

PREOWNED – FULLY TESTED – SILVER – INCLUDES ORIGINAL BOX/PACKING

The Audio Note Kits (ANK) DAC 4.1x is a highly regarded, zero-oversampling (NOS) vacuum tube R2R DAC. It features the classic 18-bit Analog Devices AD1865 chip, tube-regulated power supplies, and premium, custom-wound triple C-core output transformers for an exceptionally natural and analog-like sound.

Core Specifications

• Digital-to-Analog Chip: 18-bit Analog Devices AD1865N

• Digital Receiver: CS8414

• Supported Sample Rates: 44.1kHz, 48kHz, 96kHz

• Design Topology: Zero-oversampling (NOS), direct-heated triode output stage

• Channel Balance: Less than 0.2dB

• Output Impedance: ~13 Ohms to 600 Ohms depending on the specific build/configuration

Valve/Tube Complement

The 4.1x uses a highly robust, tube-rectified and tube-regulated power supply alongside a rich tube output stage:

• Power Supply Stage: 1 × 6X5 rectifier, 1 × ECL82 regulator, and 1 × 12AU7

• Output Stage: 1 × 12AU7 (input tube) paired with 1 × ECC99 or 2 × 5687 (output stage, depending on the edition)

Connectivity & Features

• Digital Inputs (Switchable): Standard 75-ohm RCA (S/PDIF) and 110-ohm AES/EBU (XLR). (Note: USB input is typically available as an optional add-on board).

• Analog Outputs: Single-Ended (RCA) and Balanced (XLR)