I resolved to heed my own advice about assumptions. No more…

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Description: Two-way, reflex-loaded, stand-mounted loudspeaker. Drive-units: 1.25" beryllium-dome tweeter, 7" doped-paper–cone woofer. Crossover frequency: 2.06kHz. Frequency response: 42Hz–35kHz, ±3dB. Nominal impedance: 8 ohms. Sensitivity: 87dB/W/m. Power handling: 200W.
Dimensions: 15.2" (390mm) H by 10.2" (260mm) W by 16.9" (430mm) D. Weight: 37.9 lbs (17.2kg).
Finishes: Silver or Piano Black with Pioneer Birch side panels.
Serial Numbers Of Units Reviewed: B0770027 A/B.
Price: $2795/pair. Approximate number of dealers: 60. Warranty: 3 years…
Digital Sources: Ayre C-5xe and Muse Polyhymnia universal players, McIntosh MS750 digital music server.
Preamplifiers: Ayre K-1xe, Conrad-Johnson ACT2.
Power Amplifiers: Musical Fidelity Nu-Vista 300; Portal Audio Paladin monoblocks.
Integrated Amplifier: Ayre AX-7e.
Loudspeakers: Dynaudio Confidence C1.
Cables: Interconnect: Shunyata Research Aries & Antares. Speaker: Shunyata Research Lyra.
Accessories: Ayre L-5xe line filter; Furutech eTP-609 distribution box; APC APCS15 AC line conditioner; Furutech RDP panels, RealTraps Mini…
The Usher Be-718 was both less sensitive than average and less sensitive than specified, at an estimated 85dB(B)/2.83V/m. Offsetting the speaker's need for voltage, however, is an impedance modulus that remains above 6 ohms throughout the bass and midrange, and drops below 6 ohms only briefly in the treble (fig.1). Only a combination of 5.7 ohms magnitude and –41° electrical phase angle at 2.5kHz keeps the Usher from being rated an easy load for the partnering amplifier to drive.
The traces in fig.1 are free from the small wrinkles that would hint at the…
But when I was asked about good headphones at a Lunar New Year celebration held by the clan of my buddy Jeff Wong, the conversation actually got going. Two other discussions paused as people concurred that they were getting disgusted with the sound of the ubiquitous white iPod earbuds. For once, I wasn't the geekiest guy at…
A…
Description: Lightweight, sound-isolating, in-ear headphones with four balanced armatures, passive crossover, and 1/8" stereo minijack. Frequency range: 10Hz–16.5kHz. Sensitivity: 119dB/W/m. Impedance: 18 ohms. Noise isolation: –26dB. Optional accessories: spare cables, metal carrycase, wax-removal tool, earmold cleaner, disinfectant wipes.
Dimensions: Cable lengths: 46" (1.18m) or 64" (1.64m). Weight: 1 oz (28gm).
Serial Number Of Unit Reviewed: 9027-3.
Price: $1150, plus custom earmold fee; includes personalized carrying case. Approximate number of…
Digital Source: Apple iPod.
Headphones: Ultimate Ears UE-10 Pro, Shure ES530.
Headphone Amplifiers: HeadRoom Micro, Ray Samuels Emmeline The Hornet & Emmeline The Tomahawk.—Wes Phillips
Keith Howard is writing an article for Stereophile about assessing the frequency response of headphones. Unfortunately, I lack the necessary hardware to follow his example. I did measure the electrical impedance of the Ultimate Ears UE-11 Pros, however. To ensure the correct acoustic loading, the review samples were inserted in Wes Phillips' ears. The results are shown in fig.1. I had understood that the UE-11s are easier to drive than the UE-10 Pros, which WP reviewed in October 2006; however, the '11's impedance at low frequencies averages 10.5 ohms compared…
As can be seen in "Letters" this month, some readers take exception to this series of reviews: "I know of no-one . . . who really gives a damn about $400…