All items tagged with DIY audio (46)

Audio Electronics: Cascodes, Folded Cascodes, and Current Mirrors (Part 1)

January 19, 2022 by Morty Tarr

Audio Electronics: Cascodes, Folded Cascodes, and Current Mirrors (Part 1)

For this audio electronics article, Morty Tarr wrote a fascinating exploration of circuit topologies that are used to provide specific functions for an amplifier design. Cascodes, folded cascodes, and current mirrors are some of these topologies, intended to improve the performance of the devices, but which also add complications. In the first of a three-part series, the author discusses cascodes and folded cascodes, useful to improve high-frequency response and device linearity.

New DIYclassD UcD700 Monoblock Amplifier Kit Now Available

January 18, 2022 by audioXpress Staff

New DIYclassD UcD700 Monoblock Amplifier Kit Now Available

Hypex Electronics, the specialist supplier in power amplifiers, power supplies and DSP solutions announced a new powerful UcD700 mono kit featuring its UcD technologies marketed under its DIYclassD brand - specifically for the DIY audio market. As the company explains, the Hypex UcD700HG with HxR amplifier module has been around for many years but was never offered as a DIY building kit before. Now, DIYclassD offers an easy to build 700 watts monoblock kit including all the necessary parts that users don't even need to solder.

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

You Can DIY! The PR-3 - A High-Quality Stereo Preamplifier

May 27, 2021 by George Ntanavaras

You Can DIY! The PR-3 - A High-Quality Stereo Preamplifier

For our readers who like to get hands-on with DIY projects, in this article George Ntanavaras describes the design and the construction of his PR-3 stereo analog preamplifier, offering three high-level unbalanced stereo inputs and two unbalanced stereo outputs. Most of the components for this design are contained on a single PCB. This article was originally published in audioXpress, January 2019.

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Mod Electronics Expanded Mod Oil Capacitors and Mod Electrolytic Capacitors Range

November 27, 2020 by audioXpress Staff

Mod Electronics Expanded Mod Oil Capacitors and Mod Electrolytic Capacitors Range

Mod Electronics is proud to serve the audio industry with Mod Capacitors. Each capacitor is focused on providing the highest performance and quality available to builders, technicians, tinkerers, and musicians. Mod offers hand-crafted oil capacitors, perfect for signal path use, as well as high temperature electrolytic capacitors for solid operation in power supplies and elsewhere. The already vast range of capacitors has been expanded with further options.

Testing, Measuring, and Smart Audio Solutions in audioXpress December 2020

November 11, 2020 by audioXpress Staff

Testing, Measuring, and Smart Audio Solutions in audioXpress December 2020

Ending the year with great content, as we do 12 times per year, audioXpress December 2020 is now available in print and online. In this edition, we pay tribute to Jeff Bagby, explore the QuantAsylum QA401 audio analyzer combined with the new QA451 programmable load, and explain the process of measuring wireless audio products using multi-tone testing. Plus, Brewster LaMacchia expands on A2B designs, Gary Galo details how to improve low-output moving-coil cartridges with his Jensen-based step-up transformer, and Mike Harkins reviews the versatile Puffin Phono DSP by Parks Audio. And much more, now available!

You Can DIY!: High-End Class-D Audio Board for the Arduino MKR Family

October 7, 2020 by Jens Tybo Jensen

You Can DIY!: High-End Class-D Audio Board for the Arduino MKR Family

Arduino boards are extremely popular among DIY enthusiasts and a number of add-ons or “shields” exist, particularly for audio players. Now, the Arduino MKR family has expanded the possibilities even more. This article details an Infineon amplifier board featuring integrated MERUS MA12070P proprietary multi-level Class-D ICs, which create an exciting platform for advanced wireless audio projects — including full-fledged Alexa-powered DIY smart speakers. This article was originally published in audioXpress, October 2020.

Audio Electronics: Testing a Tripath Power Amplifier

August 5, 2020 by Ron Tipton

Audio Electronics: Testing a Tripath Power Amplifier

Our late and much esteemed author, Ron Tipton, shared a fascinating project on testing Class-T or Tripath power amplifiers on the pages of audioXpress. As he characterized, these "small, inexpensive, and power-efficient units," sounded good "but testing them is problematic." The article also discusses the story of Tripath Technology and speculates on the reasons why the Tripath ICs remained popular among the DIY audio community. This article was originally published in audioXpress, March 2014.

New Projects, Reviews, and Glass Audio Special Articles Available with audioXpress May 2020

April 9, 2020 by audioXpress Staff

New Projects, Reviews, and Glass Audio Special Articles Available with audioXpress May 2020

audioXpress May 2020 Glass Audio/Tube Focus edition is now available. Highlighted on the cover is a review of the RødeTest FuzzMeasure Audio and Acoustic Measurement Software and Ethan Winer's experiments to measure capacitor distortion. For tube enthusiasts, Bill Reeve repurposes an old Shure preamp for line-level duty, and Bruce Heran details how he built his two Mini Blocks tube amplifiers. Mike Rothacher shares an inexpensive MOSFET Follower (MoFo) Class A amplifier project, Richard Honeycutt provides valuable lessons about repairing guitar amplifiers, and there's plenty more audio electronics focused articles. Download now!

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