PS Audio Stellar Gain Cell DAC

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PS Audio Stellar Gain Cell DAC

by PS Audio

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$1,699.00
Product Code:
PSAU-SG-DAC
Label/Make:
PS Audio
Genre/Model:
Stellar
Description:
DAC and Preamplifier - Black or Silver

Have a question about this product? Please email our audio advisor or call 1-877-929-8729 with any questions or concerns regarding your equipment purchase.

There isnít a DAC made that doesnít benefit from a great analog preamplifier. The Stellar Gain Cell DAC combines the benefits of bothóa full-featured DAC with an exceptional analog preamplifier controlling its output level. Fully balanced circuitry from input to output, the Stellar Gain Cell DAC builds upon years of research and innovation in the art of digital audio and Class A analog amplification. Together, or separately, they create an extraordinarily rich, full-bodied musical experience few standalone products can match. Stellar Gain Cell DAC is the perfect foundation for those unwilling to compromise sound quality. Rich. Lush. Powerful. A music loverís answer to spiraling cost-no-object equipment without sacrifice.

Even the best DACs in the world benefit from a zero-loss analog preamp. That fact was the basis of the Stellar Gain Cell design imperative. Combine a cutting edge DACís output with a no compromise analog preamplifier. A unique combination of a gorgeous full-featured digital to analog converter and state of the art analog amplification. Add any analog or digital source to Stellarís input, a power amp and speakers to its output, and music filled with rich textures and toe-tapping energy surprise and delight even the most critical Audiophile.

At the heart of Stellar Gain Cell DAC is a stunning, Bob Stadtherr designed, digital to analog converter. Based on industry leading Sabre32 bit Hyperstream architecture, Stellar DAC features a fully balanced Class A analog output stage with multiple power supplies, independent jitter-reduced inputs, DSD, I2S, and asynchronous USB.

The DACís output level is controlled by the analog Gain Cell. Developed in the early 2000ís by PS Audio founder Paul McGowan, the Gain Cell elegantly solves the fundamental problem facing preamp designers. Volume control. Nearly all analog preamplifiers use additional sonically-degrading elements inserted in the signal path to control volume. These impediments to the signal pathís purity range from simple potentiometers to exotic stepped attenuators, relays, solid state switches, ladder networks, transformers, light dependent resistors. All share intrusive elements in the signal path. The Gain Cell eliminates this problem without additional circuitry in the signal path by varying its gain in response to front panel controls.

Dimensions:
Unit Dimensions: 17Ē x 12Ē x 3Ē
Unit Weight: 13.5 lbs
Overview
What happens when you take a highly respected, cutting edge DAC, like our own NuWave DSD, and connect it to your power amplifier through an analog preamp? Audio nirvana. It turns out that a great analog preamp preserves a DACís magic. Together, DAC and preamp form a new class of product whose sum is greater than its parts.

Stellar Gain Cell DAC. A redefined and improved NuWave DSD and a Gain Cell analog preamplifier in one chassis.

Think of the Stellar Gain Cell DAC as a complete analog control center with an exceptional performing DAC at its heart.

All the features and functions youíd ever want in a DAC are right here in Stellar. Pure DSD, asynchronous USB, Digital Lens technology, I≤S to connect to our best transport, balanced throughout, analog volume control. Replace your preamplifier, your DACóor bothóand be stunned at the level of improvement when the full and rich tapestry of music surprises and delights your senses.

In the more than forty years of PS Audioís design innovations and breakthrough products, Stellarís groundbreaking level of performance as our gateway standalone DAC and preamplifier is unmatched for price and performance by their standalone competitors. Taken together, weíre willing to bet youíve never heard anything quite this good at anywhere even remotely close to this price.

The DAC
The Gain Cell DAC will transform your expectations of whatís possible in an under $2,000 DAC. Based on an improved version of our NuWave DSD, the performance of the Gain Cell DAC is unparalleled in this price category, or anywhere near. The Gain Cell DAC produces a seamless 3D soundstage from even normal CDs. Labored over by its chief architect, Bob Stadtherr, and hand-tuned and voiced by Paul McGowan and Darren Myers, the improvement in sound quality over other DACs is astonishing. The Gain Cell DAC accepts inputs from any digital source including I≤S and USB from your computer and outputs directly through Stellarís analog Gain Cell preamplifier with either single ended (RCA) or balanced (XLR) connections.

Used with music server software like JRiver, Bit Perfect, Amarra or Pure Music and an iPhone or Android app, the Gain Cell DAC becomes your entry into the world of high-end digital audio music, both PCM and DSD. Performance is superb at anywhere near the price and there are good reasons why, as youíll soon discover. In fact, the Gain Cell DAC is one of the best sounding products we have produced in our 24 years of building DACs. Sweet, spacious and effortless, this device will bring the life back into your music and all at the touch of a finger.

Digital Lens inside
All input signals are taken into the Gain Cell DAC in Native Mode, without Sample Rate Conversion (SRC) and fed directly into a simplified FPGA known as a CPLD (Complex Programmable Logic Device), which discovers sample rate and format, reclocks all incoming data, reduces jitter, waveshapes data output to the DAC chip, and utilizes high speed/low gate count logic to reduce propagation delay for faster throughput. This proprietary technology is called the Digital Lens.

The DAC chip itself is the acclaimed 32-bit ESS Sabre Hyperstream architecture, the output of which is passively filtered to reduce transient distortion. the Gain Cell DACís power supply includes a large analog transformer, 7 regulators, properly-bypassed high-speed switching diodes, and a massive 15,000 mFd of storage capacitance.

The output stage is a unique Class-A configuration, fully balanced and direct coupled hybrid array (utilizing both discrete semiconductors and ICs), with an extended bandwidth of -3dB at 60 kHz feeding directly into Stellarís Gain Cell.

Asynchronous USB for PCM and DSD
The Gain Cell DAC features a high-resolution USB path based on the same XMOS technology found in our DirectStream DAC. Asynchronous and capable of 24-bit 192kHz performance for PCM and single or double rate DSD, the Gain Cell DAC USB input sounds every bit as good as the best digital audio is capable of. Using a high-quality USB cable between the Gain Cell DAC and your computer creates an instant media server that can be controlled through any number of handheld devices like an iPad, iPhone or Android using a 3rd party controller program. Your entire music library can be managed by iTunes, JRiver, MConnect, Windows Media Player, Foobar, Pure Music, Bit Perfect, Media Monkey, Audirvana, or Ammara (to name a few) for ease of use. If you have yet to experience the pleasure of scrolling through your entire music library and selecting the next track at the touch of a finger, youíre in for a quite a treat. With the Gain Cell DAC and a USB cable you can stream both PCM and DSD high-resolution audio, using nothing more than your computer and a handheld device to control and play your entire music library.

I≤S input
Gain-Cell-DAC-rear-verticalI≤S is the native format of all CD transports and many servers. I≤S features a separate clock and data signal from the source. Typically, this clock and data signal are multiplexed together to be transmitted over a single cable in a format known as S/PDIF (Sony Philips Digital Interface), or AES/EBU (Audio Engineering Society/European Broadcast Union). Once received in multiplexed form, the DAC input must untangle the clock and data and once again separate them. I≤S solves the problems associated with unraveling data of S/PDIF and AES/EBU formats. I≤S outputs are sent via an HDMI cable and sources with I≤S outputs can be purchased from PS Audio as well as other manufacturers.

The Gain Cell DACs I≤S inputs are also compatible with our DirectStream Transport. What this means is important. The DirectStream Transport is one of only a very few players to output pure DSD from the locked SACD layer of SACD discs. Only PS Audio DACs, such as DirectStream and DirectStream Junioróand now Stellaróare authorized to play the pure DSD layer in all of its glory.

Choice of digital filters
The Stellar Gain Cell DAC offers the choice of three digital filters for users to select from. Each digital filter has a different sonic character and the choice of filters offers an excellent means of improving system synergy. No filter choice is wrong or right. Instead, each filter can be selected and auditioned by the user to more perfectly match their chosen collection of the amplifier, source, and loudspeaker, as well as personal tastes and biases.

Users can relax and use the supplied remote control to audition each of the three filter choices for best audio quality matching the system it is played on. Should users upgrade their amplifier, speaker or sources at some point, Stellar is there to help maximize performance.

Active vs. passive filtering
Once the digital audio data have been processed through the Gain Cell DACís ESS Hyperstream 32 bit DAC, itís time to turn them into music and this is the job of the analog filter and output stage. Most DACs use an active filtering system to clean up the output of the internal DAC but this can add a harsh, bright sound to the music. In the Gain Cell DAC, we use all passive analog filtering giving our output a sweet, open sound unencumbered with harsh digital artifacts.

The challenge of the Gain Cell DACís design
The real challenge designing the Gain Cell DAC was making sure both PCM and DSD were handled in a way that sacrificed as little as possible through the playback process. Entry level DACs that accept both PCM and DSD typically favor one format over another when it comes to voicing the device. The two designers of the Gain Cell DAC, chief engineer Bob Stadtherr and CEO Paul McGowan, worked together for nearly a year making decisions on power supplies, overall architecture, developing a custom, simplified FPGA for the input stage and voicing the output stage in a balanced and musical manner that honors both PCM and DSD formats.

The first choice was easy. Both Stadtherr and McGowan chose the ESS line of Hyperstream 32 architectures for the chipís unrivaled sound quality. Important to both designers would be bringing as much musical detail as possible out of Red Book CDs, and reducing the sonic gap between 44.1kHz/16 bit performance and high-resolution PCM and DSD. Lessons learned from years of building DACs aided design decisions critical to the mission of few musical compromises.

We believe that one audition of a simple CD, played through the Gain Cell DAC, will open your eyes to the magic these design efforts have brought. And once you hear what the Gain Cell DAC does on ordinary CDs, we canít wait for you to hear what the Gain Cell DAC can do for higher resolution PCM and DSD.

The Preamp
At the heart of The Gain Cell DACís analog preamplifier section is the Gain Cell. Invented in the early 2000s by PS Audio founder, Paul McGowan, this unique approach to variable gain amplification eliminates a classic problem for preamplifier designers. The volume control.

All preamplifiers must provide a means for the level to be turned up or down. There are numerous methods of accomplishing this seemingly simple task: potentiometers, stepped attenuators, light dependent resistors, transformers, electronic switches, etc. All have something in common. The are inserted in the signal path and degrade the musical signal to varying degrees.

The Gain Cell solves the problem
Instead of inserting an additional level control in the signal path, the PS Audio Gain Cell relies on a different technology known as a variable gain amplifier (Gilbert Cell). This topology was invented in the 1960ís by Howard Jones and Barry Gilbert and widely adopted by recording and mastering studios in their analog heydayólater abandoned when these same studios went digital.

The idea behind the Variable gain cell is simple. Instead of adding additional circuitry to the signal path to vary loudness, the preamplifierís actual amplifier stage varies its gain in response to the userís front panel volume control. This method requires zero additional circuitry in the signal path, offers more than 80dB of attenuation, and if designed properly performs to the equal of most high-end preamplifiers.

A great DAC deserves an equally great analog preamp
The Gain Cell DAC has 100% analog input switching so users can select what they listen to without ever leaving the analog domain. The Gain Cell DACís variable gain amplifier solves the problem of signal degradation from additional circuitry to control volume. Together, these pure analog technologies honor the signals passed through them, whether theyíre from Stellarís DAC or an external phono stage, nothing in the music is sacrificed or lost. Musicís preserved in all its rich glory.

Stellarís Gain Cell and analog preamplifier are balanced from input to output and the sound is rich, full and engaging in ways few preamplifiers can claim. From the quietest micro-dynamics to the loudest macro-dynamic passages, Stellarís Gain Cell outputs gorgeous music through either its balanced or single ended outputs or its headphone amplifier. Music takes on new life through the Gain Cell.

Construction
Work on the Stellar series began in 2015 with the goal of building a line of world-class, exceptional sounding, under $2,000 full-size chassis products at our Boulder facilities. What we hoped for was an affordable gateway into the world of PS Audio. We wanted to build a line of equipment we would be proud to place the PS Audio name upon, and customers would be equally proud displaying in their homes, at prices anyone can afford. Our standards have always been high. In our forty plus years of business, we have never sacrificed quality, performance, or customer service when we launch a new product. If we canít proudly take a new product home and enjoy its musical delights, then itís never going to see the light of day as a PS musical instrument. Nothing is more important to us than honoring the music and those that use our products.

The first major challenge in Stellarís creation was how to build a beautiful, full-sized chassis, and still have budget enough for the level of audio quality we had envisioned. Once solved with the tireless help of PS Engineering and a cartel of local vendors eager to keep business local, our next hurdle was the biggest of allócrafting musical circuits that matched our lofty vision of sonic bliss. Nearly two years in the works, our vision of a locally built gateway line of musically gorgeous audio products took shape. The Stellar line became reality and one we hope will enjoy a lifetime legacy in the PS Audio family.

Each Stellar product is hand-built in our Colorado facility. We take great pride in what we build, how it sounds, and how the end user is treated. Weíre PS Audio, and making music and keeping our customers happy and thrilled is what weíre all about.

Features:
Class A balanced analog preamplifier
Full function DAC
Class A headphone output
Remote control
Fixed or variable DAC mode
2 output 12 volt triggers

Analog preamplifier
One balanced analog input
Three single ended analog inputs
Analog Gain Cell stage
Fully balanced input to output
Balanced XLR analog output
Single ended RCA analog output
Home theater bypass
Direct coupled without any capacitors in output signal path

Digital To Analog Converter
Four digital inputs
I2S input
Digital Lens technology
Native Mode
Three user selectable digital filters
Compatible with PS Audio DMP for SACD playback in DSD
DSD direct through I2S
192kHz asynchronous coax and TOSLINK inputs
192kHz asynchronous USB
Single and double rate DSD
CPLD input (FPGA) lowers jitter, waveshapes, reduces propagation delay
Native mode standard
No added Sample Rate Conversion
High current class A hybrid output stage
Passive output filter lowers transient distortion
Direct coupled without any capacitors in output signal path
High bandwidth output stage -3dB 60kHz
Low jitter clocks
High Current oversized analog power supply
7 voltage regulators
High speed power supply diodes
Massive 15,000 mFd low ESR capacitors
ESS Hyperstream

Specifications:

Power requirements
Input Power Model specific 100VAC, 120VAC, or 230VAC 50 or 60Hz
Power Consumption 20W
Mains Power Input IEC C14

Fuses:
100V T250V-2.0AH (2A Slow Blow)
120V T250V-1.6AH (1.6A Slow Blow)
230V T250V-1.0AH (1.0A Slow Blow)

Accessories included:
US (NEMA 5-15P) (all versions)
Schuko (CEE7/7) (230V version)
UK (BS1363) (230V version)

Analog inputs:
RCA 3 stereo pair
XLR 1 stereo pair

Digtial audio inputs
I2S:
1 PCM (384KHz max)
DSD64 DSD128
Compatible with DirectStream Transport SACD handshake for DSD playback

Coax 2 PCM (192KHz max)

Optical 1 PCM (96KHz max)

USB: PCM (384KHz max)
DSD64 (DoP) DSD128 (DoP)

Format PCM, DSD

Analog Audio Outputs
RCA (Analog Unbalanced) 1 stereo pair
XLR (Analog Balanced) 1 stereo pair
Headphones One 1/4" headphone connector front panel

Analog Performance
Gain 12dB +/-0.5dB
Maximum output 20 Vrms
Sensitivity 5.3Vrms

Input Impedance 47KΩ single ended RCA, 100KΩ Balanced XLR
Output Impedance 100Ω single ended RCA , 200Ω balanced XLR
Frequency Response 20Hz Ė 20KHz +0/- 0.25dB, 10Hz Ė 100KHz +0.1/-3.0dB
Noise 20-20KHz <-90dBV
S/N Ratio 1KHz >110dB (max output)
Channel separation 1KHz >90dB
Input separation 1KHz >90dB
THD&IM 1KHz < 0.025% , 20-20KHz < 0.05%

Headphone performance
Output power @1% THD 300Ω 300mW, 16Ω 3.25W
S/N Ratio 1kHz >95dB (max output)
Noise <-80dBV
THD & IM 1Vrms out 300Ω <0.05% , 16Ω <0.06%
Output impedance <4 Ω

Features
Volume Control 0-100 (1/2 and 1dB steps, 80dB total range)
Balance Control 24dB each direction in 1/2dB steps
Home Theater Mode Assignable to any analog input
Adjustable (in setup) to any level
Polarity (phase) Control Digital sources only
Filter Control 3 selectable digital filters (PCM digital sources only)
Trigger output (3.5mm 5-15VDC) 2
Remote Control Yes. Infra Red

Daily Audiophile
Mark Wieman

Let me just cut to the chase. The Stellar exceeded my expectations for sound quality in nearly every respect. The digital inputs produced gobs of detail, great dynamics, proper soundstage, and wide frequency range. Ripped CDs and hi-res downloads sounded astoundingly good via USB input played by my player of choice, Channel Dís Pure Music, on my Macbook Pro. Plus, the analog inputs sounded clean, full, and lively. Exactly like I hoped they would! Thereís no way around it, this is one hell of a lot of value packed into a single chassis. And the sound is as good or better than you are going to get for the priceĖespecially when you consider the Stellar is both a DAC and a preamp. It provides outstanding, modern digital conversion as well as clean analog source selection and volume control. And it does so without adding noticeable noise or veiling, and without removing detail, depth, or tone color. Aside from a couple usability quirks, its operation was flawless, and the build quality is exceptional. Highly recommended! Read More

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