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

The Berkeley Audio Design Alpha DAC Series 3 is a reference-grade PCM digital-to-analog converter and digital preamplifier derived from technology developed for Berkeley’s flagship Alpha DAC Reference Series 3. Its architecture emphasizes ultra-low phase-noise conversion clocking, exceptionally low distortion, precision digital level control and accurate reproduction of low-level spatial and timbral information rather than maximizing format specifications. Berkeley Audio Design

Supporting 24-bit PCM from 32kHz through 192kHz, MQA Rendering beyond 384kHz and HDCD decoding, the Alpha DAC Series 3 provides AES/EBU, dual 75Ω BNC S/PDIF and Toslink inputs with balanced XLR and unbalanced RCA analog outputs. Its variable output can also connect directly to a compatible power amplifier, allowing the Series 3 to serve as both DAC and digital system controller. Berkeley Audio Design

Reference Series Technology

Berkeley developed the Alpha DAC Series 3 as a more accessible implementation of technology originating in the Alpha DAC Reference Series 3.

The focus is on resolving extremely low-level information while maintaining image separation, dimensionality, tonal density and clarity in complex recordings. Rather than adding unnecessary connectivity and processing inside the chassis, Berkeley concentrates the design around the digital conversion and analog output stages. Berkeley Audio Design

Ultra-Low Phase-Noise Precision Clocking

The Alpha DAC Series 3 uses ultra-low phase-noise precision conversion clocks optimized for each supported PCM sample-rate family:

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

Berkeley specifies a clock input tolerance of ±100 ppm. Berkeley Audio Design

Clocking is a central part of Berkeley's design philosophy because timing errors can compromise transient structure, spatial information and low-level detail even when conventional frequency-domain measurements remain excellent.

AES/EBU, Dual BNC & Toslink Digital Inputs

The Alpha DAC Series 3 provides four dedicated digital inputs:

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

All accept PCM with sampling rates from 32kHz through 192kHz and word lengths up to 24-bit. Berkeley Audio Design

This makes the Series 3 particularly well suited to high-end music servers and digital transports with precision AES/EBU or true 75Ω BNC digital outputs.

No Conventional USB Input

The Alpha DAC Series 3 deliberately does not include a USB input.

For USB-equipped music servers and computers, Berkeley designed the separate Alpha USB Series 2 interface. It accepts asynchronous USB Audio 2.0 and converts it to either 110Ω AES/EBU or 75Ω BNC S/PDIF, supporting up to 24-bit/192kHz. Berkeley Audio Design

This keeps the USB receiver, processing and associated computer-side electrical activity physically outside the DAC chassis rather than integrating another potentially noisy interface into the converter.

Balanced XLR & RCA Analog Outputs

The Series 3 provides both balanced XLR and unbalanced RCA stereo analog 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, with 2Vrms or lower recommended. Balanced XLR wiring uses Pin 2 positive. Berkeley Audio Design

The wide output-level capability makes the DAC compatible with conventional line preamplifiers as well as direct connection to appropriate power amplifiers.

Precision Digital Volume & Balance Control

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

Volume can be adjusted in precise 0.1dB increments, while independent left/right gain trim operates in 0.05dB steps. Berkeley Audio Design

This provides unusually fine system-level matching and enables the Series 3 to operate as a digital preamplifier in systems built entirely around digital sources.

Direct-to-Power-Amplifier Operation

Berkeley specifically designed the Series 3 outputs for the option of connecting directly to a power amplifier. Berkeley Audio Design

A minimalist digital system can therefore be configured as:

Music Server → Alpha DAC Series 3 → Power Amplifier → Loudspeakers

For systems that also require analog sources, the Series 3 can instead feed a conventional high-end preamplifier at an appropriate fixed output level.

MQA Rendering Beyond 384kHz

The Series 3 automatically recognizes an MQA Core-decoded signal and performs the subsequent MQA rendering process to 384kHz and above. Berkeley Audio Design

This terminology matters for an accurate listing: the Alpha DAC Series 3 is an MQA Renderer, rather than a complete first-stage decoder of an untouched MQA stream.

HDCD Decoding

The Alpha DAC Series 3 also incorporates HDCD decoding, a useful feature for high-end systems built around extensive CD and ripped-disc libraries.

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

Multiple Digital Filter Options

Multiple selectable digital reconstruction filters allow the Series 3's conversion behavior to be adjusted from the front panel.

The three-digit display can show stereo/left/right attenuation, sampling rate and selected filter type, while additional controls provide input selection, absolute phase inversion and multiple display brightness levels. Berkeley Audio Design

Exceptional Distortion Performance

Berkeley specifies distortion at recommended analog output levels at:

≤ -120dBFS

At maximum output:

THD+N < -110dBFS

At sampling rates of 88.2kHz and above, frequency response is rated at ±0.1dB from below 0.1Hz to 35kHz. With 176.4kHz and 192kHz source material, response extends to -3dB at 59kHz. Berkeley Audio Design

These figures reinforce the Series 3's design priority: extremely accurate conversion and analog output rather than a long list of additional functions.

PCM-Focused Digital Architecture

The Alpha DAC Series 3 is fundamentally a 24-bit PCM DAC. Berkeley specifies PCM inputs from 32kHz through 192kHz and does not advertise native DSD or DoP input. Berkeley Audio Design

For an SEO-accurate Shopify listing, I would therefore not describe the Alpha DAC Series 3 as a DSD DAC.

Berkeley's broader design philosophy has been to perform DSD-to-PCM conversion upstream when required rather than add additional conversion processing inside its DAC. The goal is to keep unnecessary processing activity away from the sensitive D/A conversion circuitry. Berkeley Audio Design

All-Metal IR Remote & Front-Panel Control

The Series 3 includes an all-metal IR remote control and provides comprehensive front-panel operation.

Controls and indicators include input selection, digital lock status, HDCD detection, absolute phase, attenuation, sampling rate, digital-filter selection and display brightness. Berkeley Audio Design

Firmware can also be upgraded through the signal inputs, eliminating the need for a conventional computer interface inside the DAC. Berkeley Audio Design

Berkeley Audio Design Alpha DAC Series 3 Technical Specifications

These specifications follow Berkeley Audio Design's current Series 3 product page. Berkeley Audio Design

Series 3 vs. Series 3P

This distinction is important now that both products remain available.

The Alpha DAC Series 3P is the newer evolution, adding Berkeley's Perfected Technology, including proprietary RF waveguide technology, new ultra-low-noise reclocking and new extremely low-noise software aimed specifically at improving time-domain accuracy. Berkeley states that the original Series 3 continues to be available and can be factory upgraded to Series 3P specification. Berkeley Audio Design

Interestingly, their published headline specifications are otherwise extremely similar: both support 24-bit/192kHz PCM, MQA Rendering, HDCD, the same input complement, variable XLR/RCA outputs, 60dB digital attenuation and the same published distortion and frequency-response figures. The 3P's advancement is therefore principally in the implementation and reduction of time-domain/RF noise, not a higher advertised PCM sampling rate or additional connectivity. Berkeley Audio Design

That distinction should help the two Shopify pages rank separately without making the Series 3 description look like a duplicate of the 3P page.

Alpha DAC Series 3 at The Grid HiFi

The Berkeley Audio Design Alpha DAC Series 3 is an exceptional match for a dedicated high-end digital transport. Its AES/EBU and true 75Ω BNC inputs make it particularly well suited to Aurender music servers such as the N20, N30SA and N50, where the complete digital interface can be optimized around the Berkeley rather than defaulting to USB.

The Grid HiFi can build the complete digital front end around the Alpha DAC Series 3, including the music server, digital interface, preamplifier or direct-to-amplifier configuration, cabling, amplification and loudspeakers.

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