All items tagged with valves (154)
Show Report: The Exciting Sounds of Audio Expo North America (AXPONA) 2016
July 15, 2016 by Oliver A.Masciarotte

Show Report: The Exciting Sounds of Audio Expo North America (AXPONA) 2016

In this show report for audioXpress, Oliver Masciarotte highlights some of new and notable products, from headphones and DACs to amplifiers and (some) speakers that caught his attention. “Held April 15–17, AXPONA 2016 was hopping, with attendance up 16% this year. The count settled at 5,934 attendees through the doors to see 400 exhibitors in Rosemont’s Westin O’Hare,” he starts. Read the full report now available online.
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Audient Introduces New iD4 24-bit/96kHz Compact Audio Interface with DAW Control
July 7, 2016 by audioXpress Staff

Audient Introduces New iD4 24-bit/96kHz Compact Audio Interface with DAW Control

It’s very questionable that anyone would still be on the market for another USB 2.0 compact audio recording interface, given the market saturation and the transition to faster and lower-latency USB 3, Thunderbolt or even Ethernet alternatives already in the market. British company Audient believes there is still a chance and released the iD4, a single-channel unit featuring the company’s Class-A mic pre technology and good quality AD/DA converters for just $199.
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You can DIY! The F5 Power Amplifier
July 4, 2016 by Nelson Pass

You can DIY! The F5 Power Amplifier

In 2008, Nelson Pass submitted an article on its new F5 power amplifier design to audioXpress. At the time, he wrote: “I feel that it’s important to support AudioXpress, a magazine with which I have a 35 year history, and which also serves as a mainstay for the DIY community. Lately they have kindly printed projects that I had already posted on the web, but I decided that they deserve a little better than that.” Effectively, the F5 project was published in May 2008 and had a huge impact on the global DIY community and certainly contributed for the fact that audioXpress is still around today.
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A Single-Ended 6550 Amplifier
June 27, 2016 by Rick Spencer

A Single-Ended 6550 Amplifier

Many articles have appeared regarding projects using one of the most sturdy, versatile, and trustworthy audio tubes ever made — the 6550. Most of them show these audio beauties used in the push-pull configuration in order to obtain the greatest efficiency and the most power output. In this article, the 6550 is used in a clean, sweet-sounding, single-ended design. The amplifier has very few parts, is easy to build and repair, and the cost of the project is nominal when you consider the kind of sound that is produced. This article was originally published in audioXPress, September 2001.
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Allen & Heath Introduces Surfaceless Mixing And Preamp Modeling For dLive
June 14, 2016 by audioXpress Staff

Allen & Heath Introduces Surfaceless Mixing And Preamp Modeling For dLive

During InfoComm 2016, Allen & Heath has released a major firmware update for its dLive series, which includes Director software to enable offline editing and live mixing on a PC with or without a Surface, plus preamp modeling on all 128 channels, 5.1 surround sound, and dedicated Mute Groups. The announcement follows the recent introduction of a host of major enhancements to the feature set and ecosystem of its Qu Series of compact digital mixers.
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Extending the Arduino-Based Tube Power Amplifier Controller
May 28, 2016 by Mark Driedger

Extending the Arduino-Based Tube Power Amplifier Controller

In the February 2015 issue of audioXpress, Mark Driedger discussed a tube power amplifier controller based on the Arduino open-source microcontroller. In this follow-up article, Mark Driedger explains how to use some of the Arduino’s untapped capabilities to incorporate the bias meter into the amplifier controller with virtually no additional hardware. A temperature sensor and over-temperature shut-down capability are also included. This article was originally published in audioXpress, May 2015.
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The Return of the Legendary Dynaco ST70 Tube Amplifier
May 23, 2016 by audioXpress Staff

The Return of the Legendary Dynaco ST70 Tube Amplifier

At the 2016 High End show in Munich, and as advertised, visitors could experience the relaunch of the Dynaco ST70 Series 3, stereo tube amplifier, together with the prototype of a new integrated Dynaco ST-1 amplifier. The return of the Hafler and Dynaco brands was signaled in Munich with the return of what is, without question, the most successful tube amplifier of all time. And the new advanced design was sounding great already.
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Download audioXpress June 2016 and Learn More About the Future of Audio Product Design
May 9, 2016 by audioXpress Staff

Download audioXpress June 2016 and Learn More About the Future of Audio Product Design

This month, learn more on how Master Quality Authenticated (MQA) end-to-end technology is redefining the source for music. We interview Electro-Harmonix tube engineer Alan Otto, and Eminence’s Rob Gault and include a report on the CanJam SoCal 2016 show. We also discuss acoustic metamaterials, how audio cables affect the sound we hear, review the Dayton Audio OmniMic V2 acoustic measurement system, and feature a DIY project of an ecological power supply for power amplifiers.
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Decisive Momentum for MQA at Munich High End 2016
May 6, 2016 by audioXpress Staff

Decisive Momentum for MQA at Munich High End 2016

This year’s High End show in Munich was a decisive moment for Master Quality Authenticated (MQA), the technology and the UK-based private company. Adopted by an increasing number of hardware and content partners, the revolutionary end-to-end technology that delivers master quality audio in a file that’s small enough to stream or download is now closer to become mainstream following the announcement that Warner Music Group and MQA have entered a long-term licensing deal.
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Hafler-Dynaco to Make Global Launch at the High-End Show in Munich
April 18, 2016 by audioXpress Staff

Hafler-Dynaco to Make Global Launch at the High-End Show in Munich

60 years later, legacy brands Hafler and Dynaco, two of the most prestigious brands of all-time, have come together under the umbrella of Radial Engineering Ltd, Hafler’s former Canadian distributor - turned manufacturer. Since acquiring the brands in earlier 2014, Radial Engineering has been working on new Hafler designs and will now show the first Dynaco products at the High-End Show in Munich.
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