audioXpress Back Issues January “A Combination Horn You Can Build” “The Cathode Follower and Its Weaker Siblings” “Grounding and System. audioXpress Year Archive CD ( – ). Regular price $ USD Back Issues on CD – CC-Webshop. audioXpress Back Issues on CD. Find great deals for Audio Express AudioXpress Magazine October Hobby Audio Technology. Shop with confidence on eBay!.

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Then this is what you need. Auddioxpress speakers were made by Norelco and were commonly available at the time. DC balance controls allow adjustment so the lamps just extinguish when there’s no input signal. There are safety devices in the ear but they can be overridden to cause hearing damage.

Differences in Amp Sound: How Do We Find the Truth?

He wanted a versatile preamplifier that would work well in a variety of situations, and which could fit conveniently in a suitcase.

September 2, by Tadaatsu Atarashi. These pages are copyrighted No portion of this site may be reproduced audioxprss whole or in part without written permission of the author. The units and values for the measurements in mR are correct. This article explains about hands attached in the same way but where the glass is not round and cannot rotate.

In this classical tube amplifier project, author Bob McIntyre offers what is effectively the foundation for many designs that we can find currently in the market.

The exceptional performance led to investing akdioxpress a system having even smaller and much more expensive drivers that are of higher quality. Published Articles by Roger Russell These pages are copyrighted No portion of this site may be reproduced in whole or in part without written permission of the author. The high input impedance of the power transistor does not affect speaker performance when connected to the amplifier output terminals. Understanding how we hear can provide more appreciation and audioxoress even for everyday sounds.


This is a led upgrade audioxpgess. It is based on two of my earlier patents. This article was originally published in audioXpress October More of my magazine articles will be added as they are published. It works just as good today as it did back in Published Articles by Roger Russell.

AudioXpress Magazine | Hifi Collective

Driver paramater assessment, Klipschorn upgrade, Hazard tester, Transformers uncovered, Hi-end preamp, A study system. It described the procedures on how to measure high compliance woofer characteristics and how to select the appropriate cabinet size without the need for building a test cabinet. A photocell coupled to the lamp is connected at the power amplifier input. The units for radiation exposure should be in mrem and not mR.

Continue Shopping Checkout Now. The Mighty Mouse is indeed a good sounding and inexpensive project that is also a good introduction to tube amplification.

The others are various iron core audioxptess I purchased and tested for this article. The Mastercrafters model “Fantasy” and the Haddon “South Wind” mystery clocks are described in this article. Ron Tipton was deeply impressed with this amplifier project which used only five transistors per channel, two of them being current sources. Several iron cores were exceptionally good, even up 20007 watts, and a few were bad, even at 15 watts. In this article I offered to calibrate microphones that readers could send in so they could make relatively inexpensive measurements at home.

By continuing to use our website you are agreeing to our use of cookies. I also describe the history of Jefferson Electric and all the other clocks that they made over the years. This article was published in audioXpress, May This article describes an improved design for a power supply auudioxpress to audio power amplifiers that exhibits ecological and economical qualities, ideal for audio enthusiasts.

By switching the photocell in series or in shunt with a voltage divider, the device will expand or compress the audio signals. I calibrated quite a few microphones that year. Jfet line amp, minimal amp design, current source xover filters, simple audio system, Hi-end preamp, MTM spk kit review.


Skip to main content. The DC balance lights are at the top.

Published Articles by Roger Russell

A revised version of the audiioxpress includes more expensive drivers, smoother response, lower distortion, a protective network, angled cabinet sides and a grille.

Detailed instructions and diagrams for the auioxpress and crossover are given, including how to make your own crossover coils. It was published by audioXpress in March This project was originally published in audioXpress, 2070 Watch the video below on how to remove and install your new knob.

A great tube-based amplifier for phono and line sources, featuring a very subtle bass enhancement control using negative feedback to enhance only selected frequencies, below Hz.

There is an aucioxpress appeal to loud music but care must be taken to avoid permanent hearing damage. This article was originally published in audioXpress, September This article was originally published in audioXpress, March The ear is a biological transducer transforming acoustical energy into mechanical energy and then to electrical pulses.

The photo shows the rear of the expander-compressor. Welcome to Hificollective, to create an account please register here. Twenty 4-inch drivers provide high power handling and by putting them in the same long vertical column, outstanding coherence is heard.

Room acoustics and preferred speaker response characteristics are also discussed. June 8, by Simon Brown. A speaker is in the background, but doesn’t show up in this image.