Berkeley Audio Design Alpha DAC Reference Series 3P Reference Digital-to-Analog Converter

The Berkeley Audio Design Alpha DAC Reference Series 3P is the company’s flagship reference digital-to-analog converter, engineered around exceptionally low time-domain distortion, ultra-low phase-noise precision clocking, proprietary RF isolation and extremely low-noise digital processing. Rather than chasing headline sampling-rate numbers, Berkeley concentrates on the accuracy of the conversion process itself—preserving transient information, spatial relationships, timbre and low-level musical detail. Berkeley Audio Design

The Reference Series 3P accepts 24-bit PCM from 32kHz through 192kHz, provides AES/EBU, dual 75-ohm BNC S/PDIF and Toslink digital inputs, and delivers both balanced XLR and unbalanced RCA analog outputs. Its precision digital volume control also allows the DAC to connect directly to a power amplifier, eliminating a separate preamplifier when appropriate for the system. Berkeley Audio Design

Perfected Technology & Time-Domain Accuracy

The defining development in the Reference Series 3P is Berkeley Audio Design's Perfected Technology.

Berkeley's engineering focus is specifically on time-domain accuracy. The company argues that conventional distortion measurements do not fully describe the loss of transient, spatial and timbral information that can occur during digital conversion. The 3P platform therefore attacks noise, jitter, RF interference and timing errors throughout the signal path rather than relying on a single DAC-stage improvement. Berkeley Audio Design

The result is Berkeley's most advanced implementation of the Alpha DAC Reference architecture.

Proprietary RF Waveguide Isolation

A major advancement over the previous Reference Series 3 is Berkeley's new proprietary RF waveguide isolation technology.

The architecture is designed to prevent radio-frequency energy from contaminating sensitive conversion and analog circuitry. Berkeley specifically attributes the 3P's improvements in imaging precision, timbral purity and resolution to this new RF isolation technology. Berkeley Audio Design

This is not simply a firmware revision of the Series 3. The RF isolation implementation is one of the fundamental hardware changes behind the 3P designation.

Ultra-Low Phase-Noise Precision Clocking

Digital conversion depends heavily on accurate timing. Berkeley equips the Alpha DAC Reference Series 3P with ultra-low phase-noise precision clocking optimized for each supported PCM sample-rate family.

Precision clocking operates at:

44.1kHz • 48kHz • 88.2kHz • 96kHz • 176.4kHz • 192kHz

The specified input tolerance is ±100 ppm. Berkeley Audio Design

The objective is not merely maintaining digital lock, but reducing timing uncertainty before conversion so that transient structure and low-level spatial information are preserved.

AES/EBU, Dual BNC S/PDIF & Toslink Inputs

The Reference Series 3P provides four dedicated digital inputs:

• AES/EBU — 110Ω XLR
• S/PDIF 1 — 75Ω BNC
• S/PDIF 2 — 75Ω BNC
• Toslink optical

All support PCM input rates from 32kHz through 192kHz at up to 24-bit resolution. Berkeley Audio Design

Notably, Berkeley does not place a conventional USB input inside the Reference Series 3P. For USB-based music servers, Berkeley offers the separate Alpha USB Reference Series, which converts asynchronous USB to precision-clocked AES/EBU or BNC S/PDIF while providing extensive electrical isolation between the computer/server and DAC. Berkeley Audio Design

For a reference system, that separation keeps USB processing and its associated electrical environment physically outside the DAC chassis.

Balanced XLR & RCA Analog Outputs

The Reference Series 3P provides both balanced XLR and unbalanced RCA stereo outputs.

Maximum balanced output is:

+18dBu / 6.15Vrms

Berkeley recommends +12dBu / 3.1Vrms or lower for normal balanced operation.

Maximum unbalanced RCA output is:

3.25Vrms

Berkeley recommends 2Vrms or lower for normal unbalanced operation. Berkeley Audio Design

This adjustable output structure allows the DAC to integrate correctly with a wide range of preamplifiers and power amplifiers rather than forcing every system to operate at one fixed output voltage.

Direct-to-Amplifier Operation

The Alpha DAC Reference Series 3P incorporates a high-resolution digital volume and balance control with a 60dB operating range.

Volume adjustment is available in precise 0.1dB increments, while independent left/right gain trim provides 0.05dB resolution. Berkeley Audio Design

That precision allows the Reference Series 3P to function as the digital control center of a minimalist reference system, feeding a compatible power amplifier directly without requiring an additional analog preamplifier.

MQA Rendering

The Reference Series 3P includes MQA Rendering capability. Berkeley's current specification identifies MQA rendering along with multiple selectable digital-filter options. Berkeley Audio Design

Berkeley's documentation for the underlying Series 3 architecture specifies automatic detection of an MQA Core-decoded signal, with rendering extending to 384kHz and above. Berkeley Audio Design

This distinction matters: the Berkeley is an MQA Renderer, rather than being described by the manufacturer as a complete MQA decoder for a raw undecoded MQA stream.

HDCD Decoding

The Reference Series 3P also retains HDCD decoding.

Berkeley specifies detection of the 16-bit HDCD flag at 44.1kHz and the 24-bit flag at all supported sampling rates. Berkeley Audio Design

That makes HDCD functionality particularly useful for owners of large legacy CD and ripped-disc libraries containing HDCD-encoded recordings.

Multiple Digital Filter Options

Berkeley provides multiple selectable digital filters, allowing the reconstruction filter to be optimized according to source material and system preference. Berkeley Audio Design

The filter selection is integrated with the DAC's front-panel control and display architecture rather than requiring external software configuration.

Exceptional Low-Level Linearity & Distortion Performance

The Reference Series 3P's published measurements reflect Berkeley's focus on conversion accuracy.

At recommended output levels, Berkeley specifies distortion of:

≤ -120dBFS

At maximum output level:

THD+N < -110dBFS Berkeley Audio Design

At sample rates of 88.2kHz and above, frequency response is specified at ±0.1dB from below 0.1Hz to 35kHz, extending to -3dB at 59kHz with 176.4kHz and 192kHz source material. Berkeley Audio Design

Purpose-Built PCM Architecture

One unusual aspect of Berkeley's engineering philosophy is its treatment of DSD.

The Reference Series 3P is fundamentally a PCM DAC. Berkeley intentionally does not perform conventional DSD-to-multibit conversion inside the DAC. Instead, the company advocates extremely high-quality DSD-to-PCM conversion at the music server or computer before the signal reaches the DAC. Berkeley Audio Design

This keeps the additional DSD conversion processing—and its associated electrical activity—outside the DAC's sensitive conversion circuitry.

For Shopify and SEO, I would not describe the Reference Series 3P as a native DSD DAC. That would misrepresent Berkeley's deliberately different design philosophy.

Mechanically & Electrically Isolated Reference Construction

The Reference platform is built around extensive electrical, mechanical and thermal control. Berkeley uses aerospace-grade ceramic circuit-board materials in critical areas, while the enclosure is precision machined from solid billet 6061-T6 aluminum alloy. Berkeley Audio Design

The chassis weighs 30 pounds despite measuring only 17.5 inches wide, reflecting the substantial mechanical construction used to isolate the conversion circuitry.

Field-Upgradeable Firmware

Firmware is field upgradeable through the DAC's signal inputs, allowing Berkeley to update the digital platform without requiring conventional computer connectivity inside the component. Berkeley Audio Design

Berkeley also states that the previous Alpha DAC Reference Series 3 can be fully upgraded to Reference Series 3P specification, demonstrating the company's emphasis on maintaining the Reference platform over multiple generations. Berkeley Audio Design

Berkeley Audio Design Alpha DAC Reference Series 3P Technical Specifications

Specifications are based on Berkeley Audio Design's current Reference Series 3P product information. Berkeley Audio Design

Reference Series 3P + Alpha USB Reference Series

For a server such as an Aurender N50, N30SA or N20, the Reference Series 3P can be connected directly using AES/EBU or 75Ω BNC S/PDIF. For USB-only or computer-based sources, Berkeley's Alpha USB Reference Series provides the dedicated USB interface.

The Alpha USB Reference Series accepts asynchronous USB Audio 2.0 and outputs either 110Ω AES/EBU or 75Ω BNC S/PDIF, supporting up to 24-bit/192kHz. Its USB input circuitry and digital-output circuitry are electrically isolated, with the output clock and line drivers powered from a separate isolated linear supply. Berkeley Audio Design

That pairing is important for customers comparing the Berkeley with DACs that simply include USB internally: Berkeley deliberately treats the USB interface as a separate precision component rather than adding it inside the Reference DAC.

Berkeley Audio Design Alpha DAC Reference Series 3P at The Grid HiFi

The Berkeley Audio Design Alpha DAC Reference Series 3P is built for digital systems where conversion accuracy, clocking, electrical isolation and system architecture take priority over feature count. Pair it with a reference music server such as Aurender N50 or N30SA, premium amplification and a properly engineered digital connection to create an exceptionally focused high-end digital front end.

The Grid HiFi can design the complete Berkeley Audio Design system around the appropriate music server, AES/EBU or BNC digital connection, preamplifier or direct-amplifier configuration, amplification and loudspeakers.

Considering the Alpha DAC Reference Series 3P? Call The Grid HiFi at (713) 218-8120 to build the complete reference digital system around it.