I measured the PS Audio BHK Signature preamplifier with my Audio Precision SYS2722 system (see the January 2008 "As We See It"). The gain with the volume control set to its maximum of "100" was 9.8dB, balanced input to balanced output; 3.7dB, unbalanced input to unbalanced output; and 9.7dB, unbalanced input to headphone output. The unity-gain setting at the line outputs would be between "79" and "80" on the front-panel display, except that that isn't possible; the balanced gain at "80" was 0.33dB. Both sets of inputs preserved absolute polarity (ie, were non-…
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As much as I delight in pagan dreams of sweetly perfumed garden nymphs, I'm embarrassed to admit that my mind also drifts in pleasant reveries whenever I hear the words research and development in the same sentence. I am by nature a greasy gearhead. The idea of taking well-considered steps of engineering to analyze and possibly improve the operation of any electrical or mechanical system never fails to get my imaginative juices flowing. This is why I've spent decades fascinated by perfectionist audio: I like watching and participating in its edgy, eccentric evolution.
So it's perfectly…
I took a deep breath, pulled the bunker shades down, and listened to Lou Reed croon "Waiting for the Man" and execute long sloooow guitar licks that seemed so "I'm feeling g-o-o-o-o-o-o-d . . ." stretched out. An hour passed. I completely forgot to call Sphere back.
"Heroin (Version 4)": I'm addicted to musicians who can play simple guitar rhythms and jack me up into pulsating delirium. Through Sony's splendidly vivid-sounding MDR-Z1R headphones, Lou Reed's hyper-strummed, screaming, droning guitar, plus Maureen Tucker's poetic-eccentric drumming, were like a needle in my arm booting…
Ken Micallef auditioned the Wharfedale Diamond 225 in June 2017 (Vol.40 No.6):
In my review of Volti Audio's Rival loudspeaker, elsewhere in this issue, I recall how New York City turntable technician Michael Trei, who contributes to our sister magazine Sound & Vision, correctly recalibrated my Kuzma Stabi S turntable and Stogi S tonearm. That lit a fire in my vinyl-stuffed belly. I began a frenzy of LP cleaning. I bought one of those cute Pro-Ject Align It cartridge-alignment tools. For fun, I set up jazz drummer Dan Weiss's virgin Dynavector 10X5 cartridge. Lately, I've been…
Everyone knows that world-class analog and digital sources are the bedrock of all fine audiophile systems. Everyone also knows that a happy relationship of amplifier, speakers, and room makes audiophiles smirk Aren't I lucky? Fewer among us are aware that the upper limit of sound quality an audio system can deliver will be established by whichever audio contraption we use to select our sources and adjust their volume.
A hi-fi system with too little gain or an impedance mismatch (especially at the interfaces of the selector switch and volume control) can sound dim or hesitant. A system…
The next day, I played this LP through this system for one of my measurements-oriented audiophile friends. At the end of the concerto, he looked at me and said, "That's not an amp!" To my quizzical expression he responded, "That's a second-harmonic generator!" Sheepishly, I admitted that the sound might be a little rich in even-order harmonics, but then asked him, "What else could sort and display this complex music in such a tactile, spacious, satisfying way?" Timpani were far back but completely fleshed out, still weighty and accurately toned. Piano was front right, solid, and frantic, all…
One year ago almost to the day as I write, Peachtree Audio invited me and other members of the audio press to the New York City retail shop Stereo Exchange, where various announcements regarding the brand were bundled, by the company's Jim Spainhour and David Solomon, under the virtual banner "PEACHTREE 2.0." Among the news: Peachtree, based in Bellevue, Washington, would now be manufacturing their nova integrated amplifiers in Canada—the company's previous offerings were all made in China—and they'd signed up a new design and engineering team.
Smiles were smiled and drinks were drunk,…
Sidebar 1: Specifications
Description: Tubed, dual-mono, line-level preamplifier. Tube complement: four 12AU7, two 5AR4. Inputs (all RCA): 4 pairs line-level, 1 pair home-theater bypass, phono optional. Outputs (all RCA): 2 pairs variable, 1 pair fixed. Gain: 12dB. Input impedance: 100k ohms. Output impedance: 2800 ohms. Input sensitivity: 200mV.
Dimensions: 14.5" (370mm) W by 8" (200mm) H by 15.5" (390mm) D. Weight 37.5 lbs (17kg).
Serial number of unit reviewed: D6442852.
Finish: Gray lacquer.
Price: $2199. Approximate number of dealers: 60. Warranty: 2 years, limited;…
When listening resumed, the nova300 sounded considerably less dry, if not quite tube-like, though a trace of treble grain remained audible. But that was offset by exceptionally good musical momentum and at least decent sonic color, both of which I heard in the nova300's portrayal of "At the Meeting House," from Julian Lage and Chris Eldridge's Close to Picture (CD EP, no label, no catalog number). The Peachtree presented the two acoustic guitarists in a manner that emphasized the lightness and delicacy and precision of their flatpicking, as opposed to presenting a meaty or corporeal sound.…
Sidebar 2: Associated Equipment
Analog Sources: Palmer 2.5 turntable, Audio Origami PU-7 tonearm, AMG Teatro, Mighty Cala Sound TNT 15 cartridges; Analogueworks Zero turntable & tonearm, Ortofon 2M Black, Hana EL, Zu Denon 103 cartridges; Roksan Radius 7 turntable and tonearm, Corus Silver, Dynavector 20X2L cartridges.
Digital Sources: Mytek HiFi Brooklyn, Schiit Audio Yggdrasil DACs; Integra DPPS-7.2 DVD-A player (used as transport).
Preamplification: Rogue Audio RP-1 line-level preamplifier; Dynavector P75, Lounge Audio LCR Mk.III, Parasound Halo JC 3+, Tavish Design Adagio…