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DACs

Audio Note DAC 2.1x/II Balanced

Level 2 NOS DAC on the AD1865 — valve-rectified supply, ECC82/5814a output stage into custom output transformers, single-ended and balanced outputs.

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The long view

About the
Audio Note DAC 2.1x/II Balanced.

The DAC 2.1x/II Balanced is the top build of Audio Note UK’s Level 2 converter — no oversampling, no jitter reduction, no noise shaping, no re-clocking, on the Analogue Devices AD1865 18-bit chip. The output stage is an upgraded version of the classic AN Line-preamplifier circuit running a pair of ECC82 / 5814a double triodes into custom in-house output transformers, with provisions for both single-ended (RCA) and balanced (XLR) operation. The power supply is valve-rectified, in the full-size Balanced DAC chassis.

Variations

Audio Note DAC 2.1x/II Balanced across 6 variants.

Six DACs climbing through the Audio Note UK tier ladder. The brand uses non-oversampling (NOS) R2R conversion throughout — no delta-sigma, no upsampling. The output stage moves from solid-state at the entry tier (0.1x) to fully valve-based + silver-wired by Level 5 (DAC 5). Each tier matches the rest of the catalogue: a DAC 2.1x belongs with a Level 2 amp / preamp pairing.

Model Tier Output Stage Balanced Output Output Transformer Notes Tier
DAC 0.1x 0 Solid-state No Zero range entry · CD-spec
DAC 1.1x 1 Valve No First valve output stage in the line
DAC 2.1x Signature 2 Valve No Copper-wound Transformer-coupled output
DAC 3.1x/II Balanced 3 Valve, balanced Yes Copper-wound First balanced DAC · pairs with balanced amps
DAC 4.1x Balanced Sig. 4 Valve, balanced Yes Silver secondary IZVOR build · Level 4 silver upgrade
DAC 5 Signature 5 Valve, AN silver wire Yes Silver-wound, AN reference IZVOR build · Level 5 flagship