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Stereophile December 2020

Every month Stereophile magazine offers authoritative reviews, informed recommendations, helpful advice, and controversial opinions, all stemming from the revolutionary idea that audio components should be judged on how they reproduce music.

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AVTech Media Americas, Inc.
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12 Edities

in deze editie

7 min

Iused DRA Labs’ MLSSA system and a calibrated DPA 4006 microphone to measure the Bowers & Wilkins 705 Signature’s frequency response in the farfield, and an Earthworks QTC-40 mike for the nearfield and in-room responses. I measured the impedance with MLSSA, checking the results with Dayton Audio’s DATS V2 system. I used the formula in a 1994 JAES paper by Eric Benjamin to calculate with Microsoft Excel what UK writer Keith Howard has called the “equivalent peak dissipation resistance” (EPDR).1 Bowers & Wilkins specifies the 705 Signature’s sensitivity as 88dB/2.83V/m; my estimate was within experimental error of that figure, at 87.6dB(B)/2.83V/m. The 705 Signature’s impedance is specified as 8 ohms. The impedance magnitude (fig.1, solid trace) stays above 8 ohms in the midrange and mid-treble region, with minimum values of 5…

8 min
déjà lou

It’s déjà vu all over again in New York City. 1988: The bankrupt Fear City NYC of the 1970s had given way to the go-go ’80s, with many missing the fruits of the Wall Street boom. AIDS ravaged the city, unabated, and a rash of violence and crime fueled by the crack-cocaine epidemic made for a grim underbelly of urban blight and neglect. 2020: A global pandemic runs rampant, killing thousands of New Yorkers, accompanied by an economic collapse (except on Wall Street) and social unrest. The crime rate spikes. People are fleeing the city, and there’s a strong sense of sliding backward into chaos. In 1988, the late, great Lou Reed surveyed the scene, retreated to his New Jersey country house, and turned out a masterpiece of an album, New York. Reed’s…

1 min
associated equipment

Analog source Linn Sondek LP12 turntable with Lingo power supply, Linn Ekos tonearm, Linn Arkiv B cartridge, Channel D Seta L phono preamplifier. Digital sources Roon Nucleus+ file server; Ayre Acoustics C-5xeMP universal player; PS Audio PerfectWave Direct-Stream D/A processor and MBL N31 CD player/DAC, Ayre Acoustics QA-9 A/D converter. Preamplifier MBL Noble Line N11. Power amplifiers Parasound Halo JC 1+ monoblocks. Integrated amplifier NAD M10. Loudspeakers KEF LS50, Marten Oscar Duo. Cables Digital: AudioQuest Vodka (Ethernet), AudioQuest Coffee (USB), DH Labs (1m, AES/EBU), Esperanto (S/PDIF). Interconnect: AudioQuest Wild Blue (balanced) with Parasounds, AudioQuest Fire (single-ended, with NAD). Speaker: AudioQuest K2. AC: AudioQuest Dragon Source & High Current, manufacturers’ own. Accessories 24" Celestion loudspeaker stands; Target TT-5 equipment racks; Ayre Acoustics Myrtle Blocks; ASC Tube Traps, RPG Abffusor panels; AudioQuest Niagara 5000 Low-Z Power Noise-Dissipation System (amplifiers)…

1 min
calendar of industry events

ATTENTION ALL AUDIO SOCIETIES: We have a page on the Stereophile website devoted to you: stereophile.com/audiophile-societies. If you’d like to have your audio-society information posted on the site, email Chris Vogel at vgl@cfl.rr.com. (Please note the new email address.) Please note that it is inappropriate for a retailer to promote a new product line in “Calendar” unless it is associated with a seminar or similar event. CALIFORNIA Friday evenings, 5–7pm: The San Francisco Audiophile Society hosts a virtual Happy Hour via Zoom. This is open to anyone who’d like to join them to talk about hi-fi and whatever else is on your mind. They have special guests from time to time; John Curl is a regular. They have also instituted monthly vinyl and digital discussion forums. For more information on this and other…

1 min

Description Solid-state, mono power amplifier. Input: 1 balanced (XLR). Output: 2 pair custom, gold-plated binding posts. Input impedance, balanced (20Hz–20kHz): 10k ohm. Output impedance: 0.0075 ohm. Gain: 31dB. Bandwidth: 0.3Hz to 350kHz, −3dB. Input sensitivity: 592mV. Dynamic range: 110dB. THD+N: 110dB. Output power (at 1% THD+N, class-A): 55W into 8 ohms, 110W into 4 ohms, 220W into 2 ohms (all 17.4dBW). Power supply capacity: 440,000μFpc. Power consumption, high bias: <0.5W idle, 350W standby, 1350W maximum. Dimensions 18.5" (470mm) W × 9.45" (240mm) H × 18.11" (460mm) D. Weight: 99.2lb (45kg) each. Shipping weight: 126lb (57kg) each. Finish Brushed black anodized aluminum and black polished acrylic. Serial numbers of review samples 1612PPA+B. Designed and built in Denmark. Price $45,980/pair. Approximate number of US dealers: 13. Warranty: 2 years parts and labor. Manufacturer Gryphon Audio Designs ApS,…

11 min
the classical voice

How to explain the power that trained operatic voices hold over many of us? For me, the pull began days after I was born, when acoustic 78s of tenor Enrico Caruso and coloratura sopranos Amelita Galli-Curci and Luisa Tetrazzini played in the background. There was something about the way the dramatic-to-the-core Caruso sang, as if his life depended on it, while the high-flying coloraturas skipped lightly through impossible strings of notes. It moved me like little else. The magic of classical vocal artistry revolves around the ability to seduce with sound while conveying a wide variety of human emotions through voice alone. Rare is the artist like Cecilia Bartoli who can sound joyful one minute, wracked with pain the next, and furious 20 bars later. Many singers can demonstrate multiple emotions…