In this issue

8 Miking Instruments
A Few Techniques
By Richard Honeycutt
16 The Nu:Tekt HA-K1 “Tube” Headphone Amplifier by Korg/NuTube
Power, Psychology, and Distortion
By Erik Owen
Erik Owen took home the Nu:Tekt HA-K1 headphone amplifier, which is sold exclusively as a kit. After the kit was assembled, he performed a few listening tests and shares his findings.
24 Restoration and Revival of the McIntosh MC30 (Part 1) Rebuilding the MC30
By Bruce Brown
This article focuses on the restoration and some improvements to the MC30 mono power amplifier.
32 A Second Life for a Vintage Tube Amplifier
By Mark Driedger
Just for fun, Mark Driedger decided to revamp his old Electra EL-3000.
36 Build a Budget-Friendly High-Performance Valve Headphone Amplifier
By Bruce Heran
Learn how to build a simple valve headphone amplifier. There are no capacitors, it is easy to configure.
40 Desktop Vacuum Tube Headphone Amplifier
By Bill Reeve
A vacuum-tube-based headphone amplifier that could also be used to drive small desktop speakers.
42 An Outrageous Mu Stage An Update of My 1993 Mu Stage Design
By Alan Kimmel
The Mu Stage is capable of producing the most constant-current operation as well as very low output impedance. Kimmel is back to divulge some of the most recent updates of his Mu Stage.
46 Experimentation Opened a Realm of Possibilities Interview with Shannon Parks, Founder of Parks Audio
By Shannon Becker
52 Searching for a Unicorn (Part 1) Measuring Voltage Regulator Ripple Rejection
By Brian Lowe
This article examines a search for a true measurement of ripple rejection, also called power supply rejection ratio (PSRR).
58 Square-Wave Testing
By Richard Honeycutt

audioXpress Magazine Description:

Step into the realm of audio, sound technology, and the latest developments in the field with audioXpress Magazine. We're delighted to introduce you to this publication, your ultimate source for all things related to audio, audio equipment, and the art of sound reproduction.

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