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Loudspeakers and Subwoofers

The highly regarded Joseph Audio line of loudspeakers owes much of its uniquely smooth yet detailed sound to the company's Infinite Slope Crossover, an ingenious driver integration technique that applies very steep rolloffs to minimize overlapping frequencies. According to designer Jeff Joseph, a key benefit of this approach is that it permits him to use metal drivers for the midrange and woofers without the characteristic ringing and harsh peaks that such drivers tend to exhibit near their crossover regions. To demonstrate this, Jeff displays a pair of before and after waterfall plots showing the impact of the Infinite Slope Crossover on the same drivers, smoothing out the unwanted spikes. "You get all the advantages of metal drivers-all the detail and clarity-without the drawbacks," he said.

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After developing the latest generation of the Infinite Slope Crossover design for his company's flagship Pearl ($20,000/pair, shown above), Joseph adapted it for revised "Mk2" versions of his lower-priced speakers. Shown here from left to right, the floorstanding RM22si ($2,500/pair), the RM7si minimonitors ($1,800/pair), and the RM33si "Mini-Pearl" ($7,500/pair).

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New from Von Schweikert Audio, the dB-99 loudspeakers ($6,000/pair) are a high-efficiency design created specifically for use with those low-power single-ended triode (SET) tube amplifiers that enjoy a devoted audiophile following nowadays. Click for a Larger Image
Named for its efficiency rating, the dB-99 employs a highly-sensitive Audax driver for its midrange, making it a viable dynamic cone alternative to the horn designs usually paired with SET amps. Per designer Albert Von Schweikert's predilection for the enveloping spatial quality of planar-type loudspeakers, the dB-99 also includes a rear-firing ambience driver with adjustable potentiometer. For even greater efficiency, a top-of-the-line version of this loudspeaker, the dB-100 ($10,000), adds an active bass module with built-in 600 w.r.m.s. amplifier and adjustable volume control, which can be driven directly from the SET amp source with no need for external crossover. Click for a Larger Image
Also now in production from Von Schweikert Audio are the TS-350 surround speakers, at $2,000/pair. Voice matched to the company's current VR-series to make a complete home theater package, the TS-350s continue the switchable tripole/dipole design introduced in Von Schweikert's previous surround models. The design gives listeners the choice between a more discrete sound (with all drivers operating in phase) and more spatial envelopment (with a dipolar setting). However, in the new versions the toggle control is located on the rear panel, making switching-on-the-fly impractical for wall-mounted installations-these are intended more for set-it-and-forget-it setups. As of yet there's still no sign of an update to Albert's spectacular full-range floorstanding surround models& but hope springs eternal. [] Click for a Larger Image

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Latest additons 1st February 2002:

Sherbourn Technologies P7/1000
Sherbourn Technologies 5/1500A
DTS In-Car Audio Demonstration
DTS Multimedia Demonstration
Philips Pronto Remote Controls
Philips DVD+RW Recorders
Simaudio Titan & W-5 Amplifiers
WAVAC Audio Lab Model HE-833
conrad-johnson PV-12L & 17LS
conrad-johnson GAT
Quad ESL-989 & Verity Audio Tamino
Avantgarde Acoustic Duo & Uno
NHT Evolution Loudspeakers
NHT Evolution Theory & Design
Joseph Audio Loudspeakers
PS Audio Ultimate Lab Power Cable
PS Audio Power Director & Juice Bar
PS Audio Classic 250 & HCA-1 Amps
Morel Applause & Octave
Anthony Gallo Acoustics Due
Miller & Kreisel Multi-Platform
Miller & Kreisel Column Surrounds
Lamm Industries L2 Reference
Vacuum Tube Logic TL 2.5.1
McCormack Audio MAP-1 Processor
Cary Audio CAD-88 Amplifier
Toshiba Blue Laser Prototype
Draper Revelation & Hi-Def Gray
NHT Evolution Subwoofers
Von Schweikert Audio dB-99

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Show report last updated: 1st February 2002 ~ 368 original images on-line.


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