Robert Harley

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Robert Harley  |  Jul 10, 2018  |  First Published: May 01, 1995  |  11 comments
The men behind HDCD (L–R: Pflash Pflaumer, Michael Ritter, Keith Johnson

High Definition Compatible Digital® (HDCD®), the proprietary process for improving the sound of 16-bit digital audio, has finally arrived. More than a dozen digital processors using the technology are on the market, and the professional encoder used to master HDCD discs is following closely behind.

Robert Harley  |  Apr 12, 2018  |  First Published: Jun 01, 1993  |  2 comments
Whoever invented the adage "Good things come in small packages" wasn't into high-end audio. Most high-end products are huge and heavy, with massive power supplies, thick front panels, and battleship build quality. This dreadnought approach is justified if it directly affects the unit's sonic performance (as in the Mark Levinson No.31 transport, for example). In some products, however, the massive build can reflect a shotgun, overkill approach by the designer, or a mere fashion statement.
Robert Harley  |  Feb 06, 2018  |  First Published: Feb 01, 1995  |  24 comments
Someone interested in buying a digital/analog converter today must make tough choices. Not only are there several competing technologies to choose from—multi-bit, 1-bit, hybrid—but every converter also has its own musical signature. When someone buys a converter, they're locked in to both the technology and the sound.
Robert Harley, Thomas J. Norton  |  Jul 15, 2016  |  First Published: Apr 01, 1990  |  0 comments
The DQ-12 is the latest loudspeaker from Dahlquist employing their "Phased Array" technology, first used in 1973. The company was formed that year by Jon Dahlquist and Saul Marantz to produce the DQ-10, a loudspeaker that enjoyed a long and successful life. When I sold hi-fi in a retail store in the late 1970s—we stocked Dahlquist speakers—the DQ-10 was among the more prominent audiophile speakers, prized for its imaging abilities.

In 1976, Carl Marchisotto joined the company, designing support products for the DQ-10 including a subwoofer, variable low-pass filter, and a passive crossover. Jon Dahlquist is no longer actively involved with the company; Carl has now assumed the engineering responsibilities at Dahlquist and is the designer of the latest group of Phased Array loudspeakers (footnote 1). This new line, introduced at the Winter 1990 CES in Las Vegas, encompasses three models: the $850/pair DQ-8, the DQ-12 reviewed here, and the $2000/pair flagship, the DQ-20i.

Robert Harley  |  Jun 09, 2016  |  First Published: Feb 01, 1991  |  1 comments
Back in 1970, one Julian Vereker decided to record some musician friends in his house in Salisbury, England. Using standard, off-the-shelf electronics and tape machines, he was startled at how dissimilar the recording was to the sound of live instruments. As a result, he started designing his own recording electronics, including a recording console, of which he sold several to local broadcast facilities.
Robert Harley  |  May 14, 2016  |  First Published: Sep 01, 1990  |  4 comments
The philosophy promoted by many mainstream stereo magazines (and thus often the belief of the general public) is that one should spend a minimum amount of one's hi-fi budget on electronics and front ends, and a maximum amount on loudspeakers. Since all electronics sound alike and it's the loudspeaker that really produces the sound, the highest overall performance is obtained by putting expensive loudspeakers at the end of a chain of inexpensive electronics. Cables? Don't waste your money.
Robert Harley  |  Apr 13, 2016  |  First Published: Dec 01, 1995  |  0 comments
Of all the products I've reviewed or auditioned, a select few jump out as "best buy" recommendations. Almost universally, such products are liked by a wide range of audiophiles, and seem to match well sonically to many systems. Moreover, these products all have outstanding value; they offer a higher level of musical performance than you'd expect from the price.
Robert Harley  |  Apr 05, 2016  |  First Published: Jun 01, 1992  |  2 comments
The night before I started to write this review, PBS began a five-part series on computers called "The Machine that Changed the World." The first episode described the development of the ENIAC (Electronic Numerical Integrator and Accumulator), the first electronic computer. The ENIAC used 18,000 vacuum tubes, had over 500,000 solder joints, required a room 30' by 50', had to be physically reprogrammed with patch cords to perform different tasks, and packed less computing power than today's $4.99 pocket calculator.
Robert Harley  |  Jan 25, 2016  |  First Published: Sep 01, 1990  |  4 comments
Now Hear This (NHT) was founded to produce low-cost loudspeakers a breed apart from the mass-market variety often found at the lower price points. Co-founder Ken Kantor has a long history in the hi-fi business as a designer at Acoustic Research, NAD, and as a design consultant to some large Japanese manufacturers. NHT's line ranges from the $180/pair Model Zero to the $1200 Model 100.

At $480/pair, the Model 1.3 is midway in NHT's product line. Finished in a gloss-black high-pressure laminate, the 1.3 is elegant, even beautiful, and is distinguished by its unusual angled front baffle. This design means that the rear baffle is nonparallel to the driver, thus reducing the amount of internal cabinet energy reflected back toward the woofer. This is said to improve imaging and midrange purity by reducing comb filtering. In addition, the angled baffle puts the listener directly on-axis with the loudspeakers pointing straight ahead. This increases the ratio of direct-to-reflected sound reaching the listener and further improves imaging.

Robert Harley  |  Dec 18, 2015  |  First Published: Sep 01, 1990  |  0 comments
The Tannoy E11 ($349/pair) is the company's least-expensive model in a wide range of consumer loudspeakers. Tannoy is most often known for its professional models, especially their nearfield, dual-concentric monitors that have become de rigueur on the top of recording consoles. The E11 is a two-way, ported design with a 6.5" woofer and 1" dome tweeter. Both drivers are manufactured by Tannoy, instead of being sourced from a driver manufacturer. The woofer is made from a polyolefin co-polymer, a plastic material with high rigidity and good self-damping properties. To improve power handling and increase sensitivity, the voice-coil is edge-wound on a Kapton former. The surround appears to be made of butyl rubber.

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