All items tagged with Gary Galo (24)

A Transformer-Coupled Balanced Output for Solid-State Preamps

July 10, 2019 by Gary Galo

A Transformer-Coupled Balanced Output for Solid-State Preamps

Longtime audioXpress contributor Gary Galo writes about a transformer-coupled balanced output circuit for solid-state preamps, usable with line-level signals. Exploring the differences between balanced interfaces and unbalanced interfaces - and finding things that we really want to be aware of, he then explains why he selected Jensen transformers for his own project. This article was originally published in AudioXpress, February 2019.

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Design, Build, and Have Fun with audioXpress February 2019!

January 10, 2019 by audioXpress Staff

Design, Build, and Have Fun with audioXpress February 2019!

audioXpress February 2019 is now available online and in the mail to all subscribers and will be distributed at the Winter NAMM show 2019 in Anaheim, CA. And to match the exciting environment, we reviewed the new d:vote 4099 CORE Instrument Microphone from DPA Microphones, visit Pascal to learn more about its pro audio amplifier modules, explore transformer-coupled balanced output circuits, and much more. There's even a DIY project for a disc recording stereo head. Really. A must read!

Getting the Most from THAT’s Balanced Line Drivers and Receivers

December 12, 2018 by Gary Galo

Getting the Most from THAT’s Balanced Line Drivers and Receivers

I completed the design and construction of an archival phono preamplifier, which provides variable equalization along with several other operational necessities for playing vintage records (78-rpm discs, pre-RIAA LPs, lacquer transcription discs, and so on). When it came to selecting topologies for the balanced inputs and outputs, I ruled out transformers due to high cost, physical bulk, and weight. The most practical choice, in terms of size and cost, are the balanced line driver and receiver ICs made by THAT Corporation. This article was originally published in audioXpress, June 2010

OPPO Digital UDP-205 Review: A 4K Ultra HD Audiophile Blu-ray Disc Player

December 6, 2017 by Gary Galo

OPPO Digital UDP-205 Review: A 4K Ultra HD Audiophile Blu-ray Disc Player

audioXpress November 2017 featured one of the most eagerly awaited reviews: the OPPO Digital UDP-205 4K Ultra HD Audiophile Blu-ray Disc Player. The new UDP-205 features dual ES9038PRO Sabre DAC chips, improved HDMI audio clock, asynchronous USB DAC with coaxial and optical inputs, headphone amplifier, and a dedicated stereo output with XLR balanced connectors. In his review Gary Galo explains why this is the 4K Ultra HD Blu-ray Disc player for which audio enthusiasts were waiting.

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You Can DIY! A 12-V Trigger Supply

November 18, 2017 by Gary Galo

You Can DIY! A 12-V Trigger Supply

This simple project provides a convenient method to remotely power audio equipment. Many manufacturers make audio equipment and power products that can be remotely switched with a low DC trigger voltage. With the trigger supply, my entire system can be turned on and off with one low-current switch. This article was originally published in audioXpress, November 2013.

A Review of Hafler’s PH50 and PH60 Phono Preamps and the PH44 Moving Coil Step-Up Transformer

September 27, 2017 by Gary Galo

A Review of Hafler’s PH50 and PH60 Phono Preamps and the PH44 Moving Coil Step-Up Transformer

To understand more about the Hafler revival, we delve into some of Hafler’s history and the companies associated with it. In this article, Gary Galo reviews the new Hafler PH50 (designed for moving magnet cartridges) and the PH60 (moving coil) Phono Preamps, as well as the Hafler PH44 Moving Coil Step-Up Transformer. All products come from Radial Engineering, the owner of Jensen Transformers and the Hafler and Dynaco brands, which it bought in 2014. This article was originally published in audioXpress, April 2017.

Fresh From the Bench: Benchmark DAC3 HGC Stereo D/A Converter

July 20, 2017 by Gary Galo

Fresh From the Bench: Benchmark DAC3 HGC Stereo D/A Converter

Benchmark Media Systems' DAC series of high performance digital-to-analog converters (DACs) have earned the respect of audio enthusiasts and professional users alike for their state-of-the-art performance, including exceptional audio transparency and vanishingly-low levels of noise and distortion. Now Benchmark has made its DAC3 even better with the upgrade to ESS Technology’s new ES9028PRO DAC chip. The DAC3 HGC, reviewed here, combines an analog preamplifier with the DAC. This article was originally published in audioXpress, July 2017.

audioXpress March 2017, Focus on Test and Measurement, Now Available!

February 13, 2017 by audioXpress Staff

audioXpress March 2017, Focus on Test and Measurement, Now Available!

A long-standing tradition, audioXpress' Focus on Test and Measurement 2017 is now available. Start with a thorough review of Audio Precision’s new APx1701 Transducer Interface; explore the DIM-100 device for interfacing and measuring with sound cards; build an Audio Dummy Load; learn how to measure Harmonic Distortion and discover the effects of Community Noise and their measurements. And just how good TIDAL's streaming quality actually is? All that and more in audioXpress March 2017. Get your copy now.

Fresh from the Bench: KAB Electro Acoustics RSX-1 Remote Analog Switch

June 22, 2016 by Gary Galo

Fresh from the Bench: KAB Electro Acoustics RSX-1 Remote Analog Switch

In this article from audioXpress’ Test Bench, Gary Galo reviews the RSX-1 Remote Analog Switch from KAB Electro-Acoustics. This is an effective solution to run multiple different sound sources connected to a single-input preamp or integrated amplifier. Solving a well-known problem, the RSX-1 allows connecting two turntables or different line level sources without compromising our connections. This article was originally published in audioXpress, July 2014.

More Audio Creativity Now Available in Linear Audio Volume 11

April 19, 2016 by audioXpress Staff

More Audio Creativity Now Available in Linear Audio Volume 11

Linear Audio Volume 11 is now available and includes excellent tutorials by Gary Galo, Hans Polak, Giovanni Stochino, Michael Kiwanuka, Guido Tent and Burkhard Vogel; articles on Circuit Design by Dimitri Danyuk and Douglas Self; articles on Room Acoustics by Hannes Allmaier and Bill Waslo, book reviews, and much more.

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