Stereoindex Picks: Choosing a Better DAC for the Way You Listen

The D&A Alpha PRO combines an ES9039MSPRO-based digital section, a discrete four-channel amplification circuit and NJU72315 analog volume control.

Its XMOS XU-316 USB receiver supports PCM up to 32-bit/768 kHz and DSD512, while Bluetooth connectivity includes LDAC, aptX HD, AAC and SBC.

More unusually for a DAC and headphone-amplifier combination, its analog input feeds the amplifier without passing through digital conversion, making the unit suitable for integrating line-level analog sources alongside digital equipment. The quoted headphone output reaches 6000 mW per channel into 32 ohms, although headphone sensitivity and impedance should still be checked before purchase.

SPEC presents the RMP-DAC3X as its first DAC, applying the Japanese company’s component-focused design philosophy to a dual-case converter.

The supplied material places particular emphasis on preserving instrumental timbre, overtones and subtle musical information rather than building the product around a broad convenience feature set.

A specially selected R-core transformer is used to supply the output stage with drive current, while capacitors receive similarly careful attention. This is the specialist option in the group for a system built around dedicated digital conversion rather than streaming, Bluetooth or headphone features.

Built around the ES9038PRO, the Audiolab D9 uses four decoding streams per channel in a differential-balanced arrangement.

Its linear power supply employs a toroidal transformer and separate discrete regulators for different digital and analog sections.

Connectivity is a major strength: AES3/EBU joins conventional digital inputs, Bluetooth supports LDAC, aptX HD, AAC and SBC, and the output section includes balanced XLR and unbalanced RCA connections. The RCA output can operate at fixed or variable level, and a built-in headphone amplifier broadens the D9’s role beyond that of a conventional line-level DAC.

The Gato Audio PRD-3S NPM is more than a DAC: it is a preamplifier with analog and digital inputs, network playback and power-amplifier-ready outputs.

Two Burr-Brown PCM1794 converters handle signals up to 24-bit/192 kHz, while the asynchronous USB input is joined by optical and coaxial connections.

Two unbalanced RCA analog inputs and one balanced XLR analog input support conventional sources. The NPM network module connects through Ethernet or Wi-Fi, can be controlled from a phone or tablet, and allows the unit to operate as a Roon endpoint.

Métronome’s Le DAC 3 is a dedicated reference-grade converter with unusually broad high-resolution format support.

It accepts PCM up to 32-bit/768 kHz and native DSD up to DSD1024, accommodating demanding file libraries without requiring format conversion at the source.

Its digital input array covers USB, AES/EBU, coaxial S/PDIF and optical Toslink, making it compatible with computers, transports and conventional digital components. Optional streaming extends the design for buyers who want network playback without changing the core DAC platform.

The Shanling UA7 brings tubes to the output stage of a compact USB DAC and headphone amplifier.

Its ESS ES9069 converter supports PCM up to 32-bit/768 kHz and DSD512, while the amplifier combines two operational amplifiers with four BUF634A buffers.

Shanling specifies up to 577 mW into 32 ohms from the balanced 4.4 mm output and 195 mW into 32 ohms from the 3.5 mm connection. An OLED display and multifunction control provide direct access to filters and gain settings, and the aluminum housing incorporates a shock-absorbing structure intended to protect the tubes during mobile use.

The Denafrips Enyo 15TH takes a discrete R2R approach rather than relying on a conventional DAC chip.

Its resistor network is assembled from components measured and selected by machine before human testing.

USB supports PCM up to 1536 kHz and DSD1024, while optical and coaxial connections accept PCM up to 24-bit/192 kHz and DSD64 through DoP. An I2S input adds another option for compatible digital sources, and users can choose between non-oversampling and oversampling modes. Both RCA and balanced XLR outputs are provided.

The Rega Saturn-R places a top-loading CD transport and standalone-capable DAC on a shared chassis.

Its two Wolfson WM8742 converters operate in parallel, and the digital interfaces support signals up to 24-bit/192 kHz.

Two optical inputs, two coaxial inputs and asynchronous USB allow external sources to use the internal converter, while a direct digital output is available from the CD transport. Full remote operation covers both sections, making this a practical way to retain physical-disc playback while adding conversion for other digital components.

The Esoteric D-02X condenses ideas from the company’s two-chassis Grandioso D1 into a single dual-mono converter.

Separate power supplies use four toroidal transformers for the digital circuits, clock generator and left and right analog channels.

Conversion is handled by 32 AK4490 chips, with 16 operating in differential mode for each channel, and Esoteric’s 36-bit conversion algorithm accompanies direct DSD processing. The design also supports 11.2 MHz DSD and includes the proprietary ES-LINK4 input interface, alongside HCLD linear buffer amplification technology.

The CVJ VVT-1 is a battery-powered wireless DAC and headphone amplifier centered on a Qualcomm QCC5125 Bluetooth chipset and dual ESS conversion chips.

Its codec support includes LDAC, AAC, SBC, aptX HD, aptX Adaptive, aptX Low Latency and LHDC, making wireless source compatibility its defining strength.

The stated headphone impedance range is 6 to 300 ohms, and the internal battery is rated for about seven hours under standard conditions. Charging during use and clear connection-status indicators add practical flexibility for transportable listening.