#DCG3

[analogaudio]

DCG3 Headphone Amplifier and Preamplifier: High-End Analog Performance with Premium Components

If you're in search of a reference-class headphone amplifier and preamplifier, the DCG3 should be at the top of your list. Designed with a clear focus on sonic purity and engineering excellence, the DCG3 delivers outstanding audio performance, thanks to a carefully selected array of audiophile-grade components and a robust circuit design.

Audiophile-Grade Input Stage with NEC uPA68H JFETs

At the heart of the DCG3’s input stage is the dual JFET uPA68H from NEC, a high-performance device known for its clean, musical sound signature that closely resembles the legendary 2SK170. The biasing for the JFETs is handled by a BF256 operating at approximately 5mA, ensuring optimal linearity and thermal stability.

Premium Build with High-End PCB and Components

The DCG3 is built on a black, 2mm thick PCB with 2oz copper for enhanced current handling and thermal performance. Measuring 160 x 50 mm, the board layout is optimized for minimal signal path length and maximum shielding from noise.

Only the best components were selected for the DCG3 to ensure superior sound quality and long-term reliability:

Vishay Dale CMF series resistors for critical signal paths and CPF for power handling

Nichicon electrolytic capacitors for smooth, noise-free power delivery

WIMA film capacitors known for their precision and low distortion

Cornell Dubilier silver mica capacitors, revered for their exceptional stability and clarity in audio circuits

Advanced Output Section with Delayed Relay Protection

The DCG3 features both line output and headphone output, each protected by a miniature NEC EA2-12NJ relay that provides delayed engagement to eliminate pops and protect connected gear.

An integrated DC servo circuit based on the AD823 operational amplifier eliminates any DC offset at the output, further improving safety and sound fidelity.

Output Stage with Vishay MOSFETs and Precision Design

The output stage utilizes robust Vishay IRF9610 and DN2540 MOSFETs, chosen for their linear performance and durability. The amplifier operates at a gain of 3x, offering just the right level of amplification for most line-level sources and headphones.

The quiescent current is set to 120mA, providing ample headroom and drive capability for a wide range of headphones, while maintaining excellent thermal behavior.

Exceptional Noise Performance and Low Output Impedance

The DCG3 achieves an impressive -120 dBV noise floor, making it virtually silent in operation. Output impedance is optimized for both outputs:

Line out impedance: 50 ohms

Headphone out impedance: less than 0.1 ohm

This ensures excellent damping factor and tight bass control, especially for low-impedance headphones.

Power Supply: SSLV1.3 UltraBiB Shunt Regulator

To match the sonic performance of the DCG3, it is powered by the SSLV1.3 UltraBiB shunt regulator, a low-noise, high-speed power supply known for its excellent transient response and ultra-clean output. This regulator was covered in detail in our previous article, and it plays a crucial role in enabling the DCG3 to reach its full potential.

Conclusion: A True Reference-Grade Headphone Amplifier

The DCG3 headphone amplifier and preamplifier is a testament to precision analog engineering. With its carefully matched components, optimized circuit design, and impeccable power delivery, it is ideal for demanding audiophiles who seek transparent, dynamic, and musically engaging sound.

Whether used as a standalone headphone amp or integrated into a high-end stereo system, the DCG3 delivers exceptional clarity, low distortion, and true reference performance.

[postsofbabel]

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A little teaser of what's to come! Official reveal in 1 hr! Are you as excited as we are? 📷: @connery_aaron #dreamcargiveaway #dcg3 #80eighty #wegiveawaycars #winacar #80eightydotcom #carporn #stance #camber #jdm

[analogaudio]

Why High-End Audio Components Deserve a High-Quality Power Supply: Spotlight on the SSLV1.3 UltraBiB

In the world of high-fidelity audio, enthusiasts often obsess over DACs, preamplifiers, and headphone amplifiers — striving for sonic perfection. But even the best-designed audio circuitry can’t perform at its peak without one crucial component: a high-quality power supply.

Let’s dive into why power supply quality is non-negotiable in high-end audio design and explore a real-world example: the SSLV1.3 UltraBiB shunt regulator, a premium solution that outperforms many commercial power supplies, and is now being used to power the DCG3 preamp/headphone amplifier.

When Great Audio Designs Are Let Down by Poor Power Supplies

Some manufacturers pour impressive engineering into their analog stages, only to cut corners on the power side — often due to cost, space, or simplicity concerns. A few noteworthy examples include:

CustomWorks HYPA1 – A highly regarded Czech-made preamplifier, renowned for its clean topology and transparency. However, its performance is compromised by an ordinary linear power supply using LM317/LM337 monolithic regulators — known for high noise and poor dynamic response in demanding audio applications.

Slovak headphone amplifier DHA2 – While offering decent performance for today’s standards, it too falls short with a basic power stage utilizing LM329AZ voltage references. Though slightly better than typical monolithic regulators, it’s still far from what a true high-end design deserves.

For audio purists, such compromises are simply unacceptable. Monolithic regulators and basic voltage references introduce noise, limit dynamics, and mask the full potential of premium audio circuits.

Meet the SSLV1.3 UltraBiB: A Discrete Shunt Regulator for Audiophile Power

The SSLV1.3 UltraBiB is a purpose-built, discrete shunt power supply designed specifically for high-end audio circuits. It offers stable, clean, and dynamic power that allows components like the DCG3 preamp/headphone amplifier to operate at their full potential.

Here’s why the SSLV1.3 UltraBiB stands out:

Technical Specifications and Build Quality

PCB Dimensions: 128mm x 84mm (without heatsinks)

PCB Thickness: 2mm

Copper Layer: 2oz for optimal current handling and thermal dissipation

Topology: Fully discrete shunt regulator with constant 200mA draw per rail, independent of load

Premium Components Only

Capacitors: Nichicon electrolytics, WIMA film types

Resistors: Vishay Dale CMF (metal film) and CPF (power resistors)

Semiconductors: IRF9610, IRF610, IRF9530, IRF530, BC327, BC337, BC560, BC550, PF5102

Diodes: ON Semiconductor MBR10100

Connectors: TE Connectivity — for reliable and durable terminations

Cooling: Four Fischer Elektronik SK 92 heatsinks to keep the power MOSFETs within optimal thermal range

Why It Matters: Power Affects Everything

The cleaner and more stable your power, the more your audio gear can deliver. Improved dynamics, blacker backgrounds, tighter bass, and a wider soundstage are all achievable — but only if the power supply is up to the task.

Monolithic regulators simply can’t offer the transient response, thermal stability, or low noise floor needed for high-end audio. In contrast, discrete shunt regulators like the SSLV1.3 UltraBiB operate with constant current draw, virtually eliminating power-induced distortion and maintaining rock-solid voltage regardless of load.

Final Thoughts: Don’t Underestimate the Power Supply

If you’re investing in a high-quality DAC, preamp, or headphone amplifier, don’t pair it with a mediocre power supply. Whether you're building or upgrading a setup based on the DCG3, or any other premium analog stage, the SSLV1.3 UltraBiB provides the clean foundation your system deserves.

Your audio gear can only sound as good as the power feeding it. Make sure it’s up to the challenge.

[80eighty-blog]

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The official reveal of DREAM CAR GIVEAWAY #3 - WIN A ACURA NSX - Head to 80eighty.com - Grab Some 80 Eighty Gear - Every $5 is an Automatic Entry - Deadline is April 17, 2016 #Acura #NSX #dcg3 #80eighty #wegiveawaycars #80eightydotcom #jointhemovement #stance #camber #jdm #carporn #amazingcars247

[80eighty-blog]

The Supra Giveaway Is Over Now! The process now is we have a few days to get everything put together sales wise! Once we do that we then export all entries to our sweepstakes company! Once they receive those they plug it in to their computer system that conducts a random drawing! The whole process usually takes about two weeks! Once I hear who the winners name is then I will figure out a way to surprise the winner! Thanks everyone for the support and good luck to everyone! Also make sure you stay tuned on Friday the 15th to see what our next car giveaway is going to be! #dreamcargiveaway #80eighty #dcg2 #dcg3 #wegiveawaycars