Description: Single-box digital-to-analog converter. Formats supported: all PCM audio codecs (AIFF, WAV, MP3, etc.). Sampling rates directly supported: 44.1, 48, 88.2, 96kHz. Digital input: USB type A, male plug (hardwired). Analog output: 3.5mm stereo phone jack. Maximum output voltage: 2V RMS. Minimum headphone impedance: 12 ohms. Maximum headphone output power: 150mW.
Dimensions: 2.5" (65mm) L by 0.675" (17mm) W by 0.375" (10mm) thick. Weight: 0.77 oz (22gm).
Serial Number of Unit Reviewed: Not found.
Price: $249 (2012); $149, v1.2 (2014).…
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Sidebar 1: Specifications
Sidebar 2: Associated Equipment
Analog Sources: Garrard 301, Thorens TD 124 turntables; EMT 997, Ortofon TA-210, Schick tonearms; EMT TSD 15 70th Anniversary & OFD 25 & OFD 65, Ortofon SPU pickup heads; Denon DL-103, Miyabi 47 & Mono, Ortofon 2M cartridges.
Digital Sources: Halide DAC HD, Wavelength Proton USB D/A converters; Apple iMac G5 computer running Apple iTunes v.10.2.2, Decibel v.1.0.2; Sony SCD-777ES SACD/CD player.
Preamplification: Auditorium 23 Standard (SPU version), Hommage T2, Silvercore One-to-Ten step-up transformers; Shindo Masseto preamplifier.…
John Atkinson also wrote about the DragonFly in October 2012 (Vol.35 No.10):
I compared the CEntrance DACPort LX ($299.95) with AudioQuest's new $250 DragonFly, reviewed elsewhere in this issue by Art Dudley. Levels were matched to within 0.1dB at 1kHz, and for the test track I used a mix I had done a couple of years back of a song called "New York Afterparty," from Heroes of the Open End, the band for which Stereophile's Ariel Bitran plays lead guitar. The backing features two electric guitars and synth, overlaying drums and bass. I had tried in the mix to recreate some of the phat low…
Sidebar 3: Measurements
I measured the AudioQuest DragonFly with Stereophile's loan sample of the top-of-the-line Audio Precision SYS2722 system (see www.ap.com and the January 2008 "As We See It"); for some tests, I also used my vintage Audio Precision System One Dual Domain. I received two samples of the DragonFly: one from initial production, the second following a running production change in which a slight modification was made in the operation of the digitally controlled analog volume control.
With the DragonFly connected to one of the USB ports of my MacBook Pro, the Mac…
On September 27, 2012, Stereophile Contributing Editor and choral conductor Erick Lichte was appointed Artistic Director of Vancouver's Chor Leoni Men's Choir, effective September 2013. Lichte previously served as the ensemble's Associate Conductor under founder and current Artistic Director, Diane Loomer, C.M. In that capacity, Lichte conducted the choir's close to 60 members to Europe this past summer, where they won 12 major awards at the 51st Seghizzi Concorso Internationale Di Canto Corale in Gorizia Italy.
Lichte's appointment follows a string of prestigious conducting positions…
A highlight for me of Stereophile's 2011 equipment reviews was Kalman Rubinson's report on Sony's SS-AR1 loudspeaker in July. I had been impressed by this unassuming-looking floorstander at the 2009 Rocky Mountain Audio Fest, when, courtesy Ray Kimber, I had used a pair for my "Loudness Wars" demonstration—and was equally impressed when I used another pair for a dem of my recordings at Massachusetts retailer Goodwin's High End, in summer 2011. The SS-AR1 costs $27,000/pair and combines a full frequency range with an uncolored, detailed midrange, sweet-balanced highs, and excellent dynamics. "…
As I mentioned in my September 2011 review of Musical Fidelity's AMS100 amplifier, I use, as a reference for midrange purity, a 1998 recital by the late mezzo-soprano Lorraine Hunt Lieberson, accompanied by pianist Roger Vignoles (CD, Wigmore Hall Live 0013). The SS-AR2s sounded superbly natural with this album; Lieberson's rich, creamy-toned performance of the aria "E Viva Ancora," from Handel's opera Ariodante, was uncolored, with apparently unlimited dynamic expression.
Nor was the SS-AR2's superlatively natural way with voices restricted to those of women. Not only was there a lack…
Sidebar 1: Specifications
Description: Three-way, reflex-loaded, floorstanding loudspeaker. Drive-units: 1" (25mm) soft-dome tweeter; 5" (130mm) sliced-paper-cone midrange; two 6.5" (165mm) aluminum-cone woofers. Crossover frequencies: 300Hz, 4kHz, with multiple slopes. Frequency range: 42Hz–60kHz. Sensitivity: 89dB/2.83V/m. Nominal impedance: 4 ohms. Power handling: 100W maximum.
Dimensions: 37.625" (980mm) H by 11.125" (280mm) W by 16.25" (410mm) D. Weight: 84 lbs (38kg) each.
Finish: Wood Grain Piano.
Serial Numbers of Units Reviewed: 0200109 & '110.
Price: $20,000…
Sidebar 2: Associated Equipment
Analog Sources: Linn Sondek LP12 turntable with Lingo power supply, Linn Ekos tonearm, Linn Arkiv B phono cartridge.
Digital Sources: Ayre Acoustics C-5xeMP & DX-5 universal players; Apple 2.7GHz i7 Mac mini running OS10.7, iTunes 10, Pure Music 1.86; Shuttle PC with Lynx AES16 soundcard & dual-core AMD Athlon processor running Windows 7, Foobar 2000, Adobe Audition 3.0; Halide DAC HD, Musical Fidelity V-DAC II, AudioQuest DragonFly, CEntrance DACport LX, Logitech Transporter, dCS Debussy, Mark Levinson No.30.6 D/A converters; Ayre Acoustics QA…
Sidebar 3: Measurements
I used DRA Labs' MLSSA system and a calibrated DPA 4006 microphone to measure the Sony SS-AR2's frequency response in the farfield, and an Earthworks QTC-40 for the nearfield and spatially averaged room responses.
My estimate of the SS-AR2's voltage sensitivity was slightly higher than the specified 89dB, at 90.5dB(B)/2.83V/m. However, while the impedance is specified as 4 ohms, the magnitude drops below 4 ohms for most of the lower midrange (fig.1). The minimum magnitude is 2.6 ohms at 110Hz, and there are also current-hungry combinations of 4 ohms…