All items tagged with Hafler (16)

You Can DIY! The DH-220C MOSFET Power Amplifier - Part 2 Construction and Testing Instructions

December 15, 2021 by Bob Cordell and Rick Savas

You Can DIY! The DH-220C MOSFET Power Amplifier - Part 2 Construction and Testing Instructions

This reference DIY project details of an upgrade construction for the legendary Hafler DH-220 lateral MOSFET power amplifier, which can also be used to upgrade other Hafler models or even inspire new designs. The design is implemented on two PCBs, one as a drop-in replacement for the original Hafler circuit board and another board that consolidates all of the output stage wiring and components within the heatsink and under the main PCB. After the authors detailed the design and performance of the DH-220C upgrade amplifier, in this second part of the article, Bob Cordell and Rick Savas discuss the construction and testing. This article was originally published in audioXpress, August 2021.

You Can DIY! The DH-220C MOSFET Power Amplifier - Part 1 The Circuit

December 8, 2021 by Bob Cordell and Rick Savas

You Can DIY! The DH-220C MOSFET Power Amplifier - Part 1 The Circuit

This article offers the first serving of an amazing DIY project from amplifier experts Bob Cordell and Rick Savas with an upgrade for the legendary Hafler DH-220 lateral MOSFET power amplifier. The design is implemented on two PCBs, one as a drop-in replacement for the original Hafler circuit board and the other as a new board that consolidates all of the output stage wiring and components within the heatsink and under the main PCB. This article was originally published in audioXpress, July 2021

audioXpress August 2021 Focus on Acoustics Issue Now Available

July 13, 2021 by audioXpress Staff

audioXpress August 2021 Focus on Acoustics Issue Now Available

The August 2021 edition of audioXpress is now available in print and online. Read our Acoustical Solutions Round-Up 2021 and enjoy the DIY perspectives from Ethan Winer and Thomas Perazella on dealing with room measurements and treatments. David Logvin reviews Audio Precision's APx517B Acoustic Audio Analyzer, while Richard Honeycutt reflects on acoustic challenges for online and in-person meetings. And we conclude the DH-220C MOSFET Power Amplifier article by Bob Cordell and Rick Savas, and the VSCS Amplifier project in this edition.

Explore Audio Amplifier Technology and Design in audioXpress July 2021

June 11, 2021 by audioXpress Staff

Explore Audio Amplifier Technology and Design in audioXpress July 2021

One of the strongest issues ever in terms of audio electronics and market insights, audioXpress July 2021 is now available. This edition includes a complete overview of Audio Amplifier Technology and Design and its many application segments. Start with a review of the NAD Electronics M33 Masters streaming amplifier, followed by a great new upgrade design for the legendary Hafler DH-220 lateral MOSFET power amplifier, and then dive into a new hybrid voltage source and current source amplifier design for loudspeakers.

Radial Engineering Launches New Website with Improved Experiences

June 29, 2018 by audioXpress Staff

Radial Engineering Launches New Website with Improved Experiences

Just as it has been quietly doing with its other brands, Primacoustic, Jensen Transformers, Hafler, and Dynaco, Radial Engineering has launched its new website at www.radialeng.com. The new much improved website front has several features to make the user experience better, while maintaining the information rich content that Radial users have come to expect and rely upon. New 'personas' on the Home page are just one of several features improving user experience.

The Dynaco ST-70 Series 3 Tube Amplifier is Now (Finally!) Shipping

May 1, 2018 by Joao Martins

The Dynaco ST-70 Series 3 Tube Amplifier is Now (Finally!) Shipping

Previewed in 2016, and originally scheduled for Spring 2017, Dynaco (a division of Radial Engineering Ltd.) announced the ST-70 Series 3 tube amplifier is now shipping. Since acquiring the legendary Hafler and Dynaco brands in 2014, Radial Engineering has been carefully working on the Dynaco ST-70 Series 3 tube amplifier, in an effort to create a truly worthy successor of one of the most successful tube amplifiers of all time. The result is finally available!

Hafler Starts Shipping PH50B and PH60B High Performance Phono Preamps with Balanced Outputs

September 28, 2017 by audioXpress Staff

Hafler Starts Shipping PH50B and PH60B High Performance Phono Preamps with Balanced Outputs

Hafler (a division of Radial Engineering) announced that its latest PH50B and PH60B high performance phono preamps are now shipping. The PH50B and PH60B feature both unbalanced RCA and balanced XLR outputs for connection to hifi playback systems or pro audio equipment. With the continued resurgence of vinyl production and sales, the PH50B and PH60B help address a growing market for high quality standalone phono stages.

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.

Primacoustic Reorganizes In-House Sales Team For North America

June 14, 2017 by audioXpress Staff

Primacoustic Reorganizes In-House Sales Team For North America

Primacoustic (a division of Radial Engineering Ltd.) announced that it has restructured its in-house custom install and AV contractor sales team. The changes are designed to better address the growing market for acoustic materials, while adding the additional responsibilities of two other Radial brands, Hafler and Jensen Transformers, to the sales team's tasks.

Hafler Introduces HA75-DAC Headphone Amplifier and USB DAC

May 17, 2017 by audioXpress Staff

Hafler Introduces HA75-DAC Headphone Amplifier and USB DAC

Hafler (a division of Radial Engineering) announced the launch of the HA75-DAC, an audiophile-quality tube based headphone amplifier and USB digital to analog converter. Basically, Radial took its existing Hafler HA75 "vintage inspired" headphone amplifier, a 100% discrete class-A circuit with a 12AX7 tube drive, and added a USB Digital-to-Analog converter input with 24-bit/192kHz support in the same 14 gauge steel casing, making it a much more practical and complete unit in multiple applications.

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