audioXpress January Inside This Issue · Supplemental Material · Digital Login. Voice Coil December Inside This Issue · Digital Login. Trending. Please note! We do not make coils wound on plastic bobbins due to risk of microphony, nor do we use ferrite cored coils that saturate abruptly. All Jantzen coils. audioXpress 1. Horn Theory: An Introduction, Part 1. By Bjørn Kolbrek. This author presents a two-part introduction to horns—their definition, features.

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Now, all we need to audioxprses is figure out how to best wed a gainclone to a tube-based frontend. Thus, the tube section is no expensive LED replacement; and the solid-state portion delivers 50W into 8-ohm loads.

Shunt or Not – Looking for the Ultimate Audio Voltage Regulator

And while the PL does dissipate 20W at idle, the real question is How many of those 20 watts actually make into the loudspeaker? In contrast, tube circuitry is fundamentally different.

If the tube does not act on an input signal, the solid-state power amplifier remains oblivious to the signal. First, the tube is calling the shots, as the feedback loop encompasses the solid-state power amplifier and the tube decides what needs fixing. In a nod to the Maker Movement, this project uses a common open-source microcontroller module, the Arduino, to build an automatic power controller for a tube power amplifier.

Believe me, running a DIY audio magazine is about the least profitable way to expend your efforts and talents. July 23, by Joe D’Appolito.

In other words, if we are allowed to break rules, why no do so with wild abandon? October 3, by Ward Maas.

The PB shares an almost identical feature set with the existing PB. October 31, by George Ntanavaras.


This article by Ron Tipton details the design and construction of the Audikxpress Model high-performance microphone preamp, using a differential input stage that used compound transistor pairs with circuit resistance values, computer optimized for very low output noise.

One wrong turn is to break the symmetry, as I did in a reply to an e-mail I received recently. The greater the internal OpAmp’s gain and the tighter the tolerance of the resistor sampling and feedback resistors, the higher the CMRR. March 14, by Richard K. July 24, by Ramkumar Ramaswamy. Now that turntables are back in force, this excellent project not only allows some knowledge about a vital part of the motor’s rotational speed adjustment, but it also dives into one of the most crucial 200 of a record player for anyone interested in a little DIY or restoration projects.

Does this mean that if we hooked up the thin wires to the woofer and the fat wires to the tweeter that no sound would be forthcoming? If the tube mixes heater hum into its output, the solid-state amplifier will faithfully reproduce the hum at the loudspeakers terminals. They are fully specified for high performance audio applications and have excellent ac specifications, including low distortion 0.

Like a king who cannot recognize a map of his kingdom, the consumer king cannot recognize the schematic to his power amplifier over that of his CD player or tuner. This article was originally published in audioXpress, February Stamler A Power Supply Spreadsheet This article describes a spreadsheet program for designing audioxprress power supplies using common IC three-terminal regulators.

This article was originally published in audioXpress, January All items in category Magazine News. This article was originally published in audioXpress, March April 19, by Paul Loewenstein. Probably because it was designed to sit on a rack and doesn’t need bus power, PreSonus made the announcement that it is now shipping the Quantum bit, kHz, Thunderbolt audio interface.

  ASTM F1941 PDF

December 31, by audioXpress Staff. The brightest engineer cannot decipher the purpose of an unmarked IC. Do not get wrong here. In other words, the solid-state power amplifier is doing all the hard work and the tube is only driving the solid-state amplifier, not the loudspeaker. This article from respected author Ari Polisois deals with a single-ended amplifier with enough power to drive even the most difficult audkoxpress xudioxpress — delivering 50W per channel.

Items tagged with: February | audioXpress

I have a few things to say about it. Sadly, the audioXpress community lost one of its most esteemed and prolific writers. Looking forward to building the Aikido, will send some comments when I’m done!

The company will promote listening sessions of the much anticipated AMBEO Soundbar, finally revealing the latest in xudioxpress 3D sound to the home and a remarkably spatial sonic experience with immersive 5.

I wish everyone did business like you. Today, solid-state audio equipment neither invites nor easily admits understanding. Just more satisfaction in the bag, there. Read this reference article, originally published in audioXpress, September February 7, by Paul J.

The entire system runs on 8 AA batteries and should operate for approximately 4 hours continuously. Now let us add the tube input stage back into the OTL amplifier there is not much point to having an OTL amplifier without tubes and let us look at where the tube’s current audioxprfss.

Following a long-standing tradition of designing high-quality speakers at reasonable prices, Dayton Audio’s new commercial pendants are designed to offer a great sound for both indoor and outdoor use. There’s no better way to pay tribute to Ron than revisit some of these projects. A temperature sensor and over-temperature shut-down capability are also included.