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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We also discuss Audloxpress Testing issues among other things. February 7, by Paul J. These are replacement light bulbs for the headlight switches pictured above. Or is it just a hybrid amplifier? The PL undergoes a current swing of 70mA at full sudioxpress and I assume that the TDA presents a low output impedance, say a damping factor ofwhich would imply an output impedance of 0.

It is readily understandable; in years past, GIs and sailors learned in a few months how to understand and fix fairly complex tube equipment. My concern, however, is with topology and circuit functioning, not audio product reviews.

This program’s goal is to provide a quick and easy display not only of the frequency response, but also of the resistor and capacitor values for a passive and active filters and crossovers. Instead it gets its compliance from two surrounds like a dual spider configuration. August 20, by Charles Hansen. The hybrid amplifier below uses the same two core components: Dayton Audio introduced the updated DTA Ahdioxpress 12, by Gary Galo.

Getting the Most from THAT’s Balanced Line Drivers and Receivers

To purchaseplease visit our Yahoo Store: InaudioXpress invited Scott Dorsey to update his popular reamping project that modeled the source impedances of a couple typical guitar pickups. So is the above amplifier an OTL? It is possible that Mr van Doorn’s hybrid amplifier is the world’s best sounding amplifier, period.


May 25, by Scott Dorsey. April 28, by Ari Polisois. 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.

With updated sections formore online exposure than ever, this is audioxpress time to secure your entry and promote your business! This article was originally published in audioXpress, September Sure, the 12AX7 only draws 1mA, but that 1mA must find a path through the TDA output stage, no less than a PL does, so what is fundamentally different about this setup other than mere tube choice? Okay, now brace yourself before examining the schematic below; it is not nearly as complicated as it seems at first glance.

Second, the two 90V rail voltages can easily be derived from a 44Vac, center-tapped secondary, which would also provide the two 32V power supply rails for the gainclone amplifier.

Four Hybrid Solid-State Power Amplifiers

The Audio Voice Newsletter. In fact, I wish to make a request of my fellow TCJers: Why audioxpresz use a smaller tube and less idle current? The consumer king paid too much, as he gave up more than just money: July 23, audioxprezs Joe D’Appolito. 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.

Although I have never critically spoken about audioXpress magazine here, my friends have heard audixpress make many disparaging audioxxpress concerning the magazine and its precedents, such as Audio Electronics and Glass Audio and Audio Amateur.

March 21, by Ron Tipton. In fact, this is the highest quality kit I’ve seen anywhere, of anything. For those still in the market for a decent phono preamplifier, Parasound just announced a new model that’s a big step up from its entry-level Zphono.

Items about: Project Articles – p 5 | audioXpress

The report presents a technological and economical comparison of four of the newest and most competitive systems-on-chips SoCs available on the market today from four different manufacturers. Qudioxpress this article, Joel Hatch explains how to build a variable frequency synchronous motor controller to control turntable speed.


The Mighty Mouse is indeed a good sounding and inexpensive project that is also a good introduction to tube amplification. No doubt that you have been told that in multi-gauge loudspeaker cable, the high frequencies travel through the thin wires and the lows travel through the fat wires, exclusively. Wanted to let you know that this is simply the best PCB I have had in my hands, bar none.

The TDA is configured as an inverting amplifier and its input resistor is capacitor coupled to the INA differential line receiver’s output, which allows the solid-state power amplifier to ignore the large DC offset from audilxpress INA, while maintaining a low DC offset at the OTL’s output, as the TDA’s positive input is grounded and the power OpAmp will use all of its considerable DC gain to drive its negative loop, bringing the output DC offset inline with ground potential.

The tube, in his audioxprrss a pentode, receives the input signal and the solid-state amplifier slavishly follows the tube’s lead. In order to get 50W into an 8-ohm load, 3. This article was originally published in audioXpress, February Thus, the builder of tube gear is like akdioxpress teenager who builds the hotrod he desires, believes in, and that expresses his vision. In addition to a number of Luxman components, the room will feature Triangle Acoustics loudspeakers and Melco streaming audio servers.

In the February issue of audioXpress, Mark Driedger discussed a tube power amplifier controller based on the Arduino open-source microcontroller. Medias this blog was made to help people to easily download or read PDF files. In fact, it can be used to calculate passive crossovers for use with speakers by entering 8 ohms as the terminating resistance.