Eversolo DAC Series R2R DAC, Preamplifier and Headphone Amplifier - DACR8

Eversolo DACR8 DAC Series R2R DAC, Preamplifier and Headphone Amplifier

The Eversolo DACR8 DAC Series R2R digital-to-analog converter, analog preamplifier and headphone amplifier combines proprietary 5+20-bit OriginR2R conversion with fully balanced analog volume control. USB-B and IIS inputs accept up to stereo DSD512 and PCM 768kHz/32-bit, while balanced XLR and RCA connections integrate analog sources and downstream components. A dedicated 6.35mm headphone output, HDMI ARC/eARC TV-audio input and Bluetooth 5.4 bring desktop listening, television sound and phone playback into one component. NOS, OS and BEST modes plus USB-connected browser DSP let you shape the presentation for your system and musical preferences.

Key Features

5.2 in IPS Touchscreen and Aluminum Construction

CNC-machined from a single block of aluminum alloy, the anodized enclosure combines a smooth, understated finish with strength and shielding. The touchscreen brings input, sample rate, volume, decoding mode, filter and output status together, while VU-meter themes and moving spectrum displays put the music in view.

A damped rotary knob makes level changes smooth and intuitive. Use the included remote or the Bluetooth-connected Eversolo Control app to change inputs and settings from your seat, and choose a knob color to personalize the presentation.

OriginR2R: Engineered from the Resistor Ladder Up

Digital processing, discrete conversion and analog output are designed as one system rather than built around a ready-made DAC chip. FPGA coordination combines 5-bit coarse segmentation with 20-bit fine adjustment for PCM, with optional FIR filtering or bypass. DSD follows its own pulse-density path into the shared resistor-array core.

Separate positive and negative paths begin at the resistor network, establishing fully differential handling before the balanced output stage. Coordinated playback, mute, format and clock changes help keep transitions seamless as you move between sources and recordings.

Precision Timing and a Quieter Background

An in-house 10 MHz OCXO and PLL provide a stable timing reference, while AuralEngine coordinates USB data reception, clock management, audio output and playback modes. Asynchronous USB lets the converter's internal clock set the pace for computer or transport playback.

A custom O-core linear supply, multistage voltage regulation, internal shielding and OPA1612 amplification support low-noise operation. The XLR output is rated at 130 dB A-weighted SNR and dynamic range, with THD+N of 0.000316% at 1 kHz, helping musical texture and dynamics emerge against a quieter background.

True R2R Analog Volume Control

The fully balanced stepped attenuator uses precision resistors to change level entirely in the analog domain, avoiding the reduction in effective digital resolution associated with digital attenuation. This keeps fine detail part of the listening experience as you adjust volume. Balanced XLR and single-ended RCA inputs and preamplifier outputs accommodate different systems; switchable XLR output polarity helps match amplifier or active-speaker pin conventions.

Desktop Headphone Listening with Three Gain Levels

A dedicated 6.35mm single-ended output brings conversion and headphone driving into one component, simplifying a desktop setup. Three gain settings and automatic impedance detection help adapt operation to different headphones within the recommended 16-300 ohm range. Low gain is specified for 16-32 ohms and high gain for 32-300 ohms. In high gain, output is rated at 1 W into 16 or 32 ohms and 0.16 W into 300 ohms.

Connections for Computers, Transports and Television

Eight IIS configurations broaden transport compatibility, with clock and audio carried on separate lines. Electrically isolated AES/EBU and coaxial inputs help limit interference between components, while optical input breaks the conductive path to reduce ground-loop noise. A separate 10 MHz/25 MHz, 50 ohm clock input lets compatible digital components share an external timebase.

HDMI ARC/eARC brings films, concerts and music programming into your stereo system; the ARC input supports up to stereo PCM 192kHz/24-bit. For spontaneous phone or tablet playback, Bluetooth 5.4 supports aptX, aptX HD and aptX Adaptive. A 12V trigger synchronizes power operation with compatible components, and a dedicated grounding terminal accommodates external grounding arrangements when needed.

Web-Based DSP: Shape Your Sound

Connect to a computer through USB-B to access driver-free browser tuning; this driver-free access applies to the DSP interface. System-wide PEQ, 20-band EQ, FIR filtering, dynamics and independent channel adjustment let you tailor the presentation to your preferences. Channel delay provides timing alignment, and centralized settings keep adjustments together. Online firmware updates are available through the interface; the separate USB-A port is for firmware updates only, not audio input.

Three Listening Modes and Six Digital Filters

NOS minimizes digital processing for a relaxed, cohesive presentation. OS offers 2x, 4x and 8x oversampling for listeners seeking greater detail, while BEST balances R2R flow and texture with musical layering and dynamics. Six digital-filter options, from fast roll-off to bypass, provide another way to adjust transients, extension and overall presentation. Choose the processing approach that suits the recording and your listening preferences.

Features

• 5.2 in IPS Touchscreen
  View signal information and settings alongside VU-meter themes or moving spectrum displays.
• Single-Block Aluminum Enclosure
  Anodized aluminum provides strength, shielding and a smooth finish.
• Flexible Control and Visual Personalization
  Operate by rotary knob, included remote or Bluetooth-connected Eversolo Control app, with selectable knob colors.
• 5+20-bit OriginR2R Conversion
  FPGA-controlled resistor conversion gives PCM and DSD dedicated processing paths.
• Fully Differential Signal Handling
  Positive and negative paths extend from the resistor network to the balanced analog stage.
• Coordinated State Changes
  Unified control manages playback, muting, format changes and clock changes.
• AuralEngine USB Interface
  Integrates incoming audio data, clock management, output and playback-mode processing.
• 10 MHz OCXO and PLL Timing
  Provides an internal reference for digital processing and asynchronous USB playback.
• O-Core Linear Power and OPA1612 Amplification
  Multistage regulation and shielding support a low-noise analog signal path.
• Fully Balanced R2R Analog Volume
  Precision resistor attenuation adjusts listening level without digital volume reduction.
• 130 dB XLR SNR and Dynamic Range
  A-weighted balanced-output ratings support the reproduction of subtle musical detail.
• 6.35mm Headphone Output with Three Gain Settings
  Dedicated amplification and automatic impedance detection accommodate headphones rated within the recommended 16-300 ohm range.
• USB-B and Eight IIS Modes
  Both inputs support up to stereo DSD512 and PCM 768kHz/32-bit.
• Isolated Digital Inputs
  AES/EBU and coaxial use electrical isolation, while optical avoids a conductive connection.
• Balanced XLR and RCA Analog Connections
  Connect analog sources and downstream equipment, with adjustable XLR output polarity.
• 10 MHz/25 MHz External Clock Input
  A 50 ohm reference connection accommodates a shared system timebase.
• HDMI ARC/eARC TV Audio
  Routes television sound to your stereo, with ARC supporting up to PCM 192kHz/24-bit in stereo.
• Bluetooth 5.4 with aptX Codecs
  Play from a phone or tablet using aptX, aptX HD or aptX Adaptive.
• 12V Trigger and Grounding Terminal
  Coordinate compatible components' power operation and accommodate external grounding.
• System-Wide PEQ and 20-Band EQ
  Adjust tonal response through a USB-B-connected computer's browser interface.
• FIR, Dynamics and Channel Delay
  Fine-tune filtering, dynamics and timing with independent channel adjustment.
• Firmware Update Options
  Update through the web interface or use the firmware-only USB-A port.
• NOS, OS and BEST Playback Modes
  Select a processing approach, including 2x, 4x or 8x oversampling in OS mode.
• Six Digital Filters
  Choose settings from fast roll-off to bypass to tailor the sound.

Footnotes:

Performance figures are based on manufacturer testing under specific conditions and may vary with the listening environment, settings and use.