Dick Olsher

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Dick Olsher  |  Apr 03, 2018  |  First Published: Jun 01, 1993  |  0 comments
I find quite appealing the image invoked by Museatex to describe its Real Time Ripple Effect (RTRE) loudspeaker line: a stone rippling the surface of a "still pond on a warm summer afternoon." Replace the stone with a voice-coil attached to the center of a stretched Mylar diaphragm and you begin to get a glimpse of the RTRE technology's conceptual beauty and promise. The idea of cohesively covering at least the midrange and treble with a single driver, without crossover filters, quickens my audio pulse.
Dick Olsher  |  Feb 19, 2013  |  First Published: Dec 01, 1989  |  0 comments
666rm9amp.jpgDo you believe in beginner's luck? If so, some of your personality traits should be quite predictable. Let's see. You're very likely an optimist with a "bull-market" mentality, play the lottery, and, most important, bought a CD player within a year of its introduction, or a solid-state amp in the '60s. You're apt to mail in a profusion of bingo cards (you know, the kind Stereo Review is full of) and spend hours perusing specifications in the hope of finding a kernel of truth in all of that chaff. You'd particularly be appalled at that fellow I ran into the other day, who had bought an AR-1 in 1956 and waited another decade before buying another speaker—just to make sure stereo wasn't a fad. Hey, relax, I won't turn you in; the mere fact that you're reading Stereophile is sufficient reason for redemption.
Dick Olsher  |  Mar 02, 2017  |  First Published: Dec 01, 1992  |  1 comments
666near50m.jpgNew England Audio Resource's NEAR-50M is a cyborg: metal innards in a wooden body. It represents NEAR's top statement in the firm's Metal Diaphragm Technology speaker line, which features the "NEAR-Perfect" driver cone. Metal—in this case an anodized aluminum alloy—is much more rigid than paper or plastic. Hence, a driver with a metal cone acts more nearly as a true piston. When it comes to loudspeaker cones, breaking up is not hard to do. When that happens, the cone flexes in a complex pattern, generating harmonic distortion. A typical plastic or paper 8" woofer may experience its first breakup mode at a frequency as low as 500Hz. The NEAR 8" metal-cone woofer's first breakup mode is said to be well above 2kHz, and their 4" metal-cone midrange does much better than that.
Dick Olsher  |  Jan 17, 2008  |  First Published: Jun 17, 1987  |  0 comments
The Ohm Walsh 5 displaces the Ohm F at the top of the Ohm line, and the current Walsh 5 production run represents a "limited edition" of 500 pairs worldwide. There's even a certificate of authenticity—hand-signed by Ohm Acoustics President John Strohbeen—packed with the speakers that makes it all official. I think that this is more than a clever marketing gesture and clearly demonstrates Ohm Acoustics' pride in their new flagship loudspeaker.
Dick Olsher  |  Jun 11, 2020  |  First Published: Mar 01, 1995  |  44 comments
The Aleph Null, or 0, represents Nelson Pass's maiden product under the Pass Laboratories banner. When he left Threshold several years ago, Pass had the luxury of starting over with a clean slate, and decided immediately that he wanted to design a single-ended MOSFET amp. The result is aptly named after Georg Cantor's first transfinite number: Aleph Null, the gateway to higher-order infinities. Just as Cantor's transfinite mathematics stretched minds with its novel conceptual view of the infinite, the Pass Aleph 0 tantalizes the imagination with a new dimension in the future of solid-state amplification: a single-ended output stage.
Dick Olsher  |  Feb 24, 2012  |  First Published: Jun 01, 1990  |  0 comments
Ten seconds to ignition. Relax, buckle in, and welcome to Stereophile's Good Times time machine. Flux capacitors fully energized. Ignition. Not to worry, that slight tingling sensation is perfectly normal. Roll back your calendar to...June 28, 1933. We're at the Eighth Annual convention of the Institute of Radio Engineers in Chicago. Harry Olsen is on the podium, describing a new wide-range cone loudspeaker for high-fidelity sound reproduction.

Quiet, please, Mr. Olsen is about to describe the disadvantages of multiple–drive-unit systems. "The radiating surfaces must be separated by a finite distance, with the result that this system will exhibit peculiar directional characteristics in the overlap region where the sound radiation issues from both sources. To reduce this effect to a minimum, the overlap region must be confined to a very small range which requires an elaborate electric filter system for allocating the frequency bands of the units. The greater space required for the two loudspeakers is another important factor. The cost of two separate field structures and vibrating systems will be considerably greater than that of a single unit."

Dick Olsher  |  May 09, 2014  |  First Published: Aug 01, 1984  |  0 comments
It has been my experience that $400 or thereabouts is about the least one can pay for a pair of speakers with the expectation of audiophile-calibre sound.
Dick Olsher  |  Jun 11, 2006  |  First Published: Apr 11, 1984  |  1 comments
Small enough to fit in a shoebox, these little darlings from England almost manage to redefine the state of the art in very compact monitor design (footnote 1). Here's a speaker that isn't as neutral as the BBC LS3/5a compact monitor, but that does manage to equal or exceed that venerable design in most respects.
Dick Olsher  |  Oct 10, 2017  |  First Published: Aug 01, 1987  |  1 comments
High fidelity took a giant step forward in 1956 with Peter Walker's introduction of the Quad ESL. Walker's research efforts had been motivated by his firm belief in the superiority of the electrostatic dipole over the box loudspeaker, but actually to take the economic plunge and market such a speaker was surely an act of bravery. After all, those were the pre-stereo, pre-audiophile days of the mid '50s, and the public's tastes and expectations were relatively unsophisticated. The average front end was abominable by today's standards, so that making definitive assessments of loudspeaker quality was a difficult task at best.
Dick Olsher  |  Jul 18, 2013  |  First Published: Nov 01, 1992  |  1 comments
Designer Dr. Roger West got his first taste of electrostatic transducers many years ago during a stint with Janszen (remember the Janszen tweeter?). To realize the potential of the full-range electrostatic loudspeaker (ESL), he and Dr. Dale Ream formed a new company dedicated to ESL research and development. West describes this company, Sound-Lab Corp., as "the electrostatic speaker specialists."

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