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Project K622 K622: The Music

Sidebar 1: K622: The Music

K622: Mozart Clarinet Concerto MFSACD017/MFLP017

Antony Michaelson, clarinet, with the Michaelangelo Chamber Orchestra conducted by Robert Bailey
Flute: Andy Findon, Helen Keen
Bassoon: Brian Sewell, Francesca Carpos
Horn: Richard Watkins, David Wythe
Violin: Adrian Levine (concertmaster), Kathy Andrew, Alex Balanescu, Sue Briscoe, Gordon Buchan, Beverly Davison, Ruth Erlich, Jonathan Evans-Jones, Alison Kelly, Pauline Lowbury, Rona Murray, David Ogden, Julian Tear, Paul Willey
Viola: Marina Ascherson, Rachel Bolt, Tim Grant, Rusen Gunes…

Project K622 Who Did What With What

Sidebar 2: Who Did What With What

Producer: John Atkinson
Engineer, analog editor: Tony Faulkner
DSD editing: Finesplice
LP mastering engineer: Stan Ricker
SACD booklet and LP sleeve design: Michaelson Rock
Microphones: Two Neumann M50c omnis on a 27" AEA stereo bar (main pickup), with an AKG C24 crossed figure-8 (clarinet spot) and three Schoeps CMC65ug cardioids (wind spots)
Mike preamps: EAR 824M
Mixing console: Tim de Paravicini custom design
Cables: Mogami (mikes to preamps), Belden 11-way "snake" (preamps to console), van den Hul carbon-fiber (console to…

Krell KAV-300i integrated amplifier

Is Krell risking its reputation? With the KAV-300i, an integrated amplifier that was originally envisaged as an export model, but for which home demand is clearly increasing, the Connecticut-based amplifier manufacturer is dabbling in low-cost territory. Previous Krell amplifiers have been known for their prodigious drive capability. Time and time again, it is found that the true measure of the bass performance of a big speaker isn't realized until a Krell power amplifier is brought into service. But how could an amplifier with a meaty 150Wpc specification and full remote control be built to…

Krell KAV-300i integrated amplifier Page 2

Inside
Inside, the compact, low-profile chassis packs a modest-looking, toroidal, steel-band-shielded transformer. This is rated at 400VA, but to a high-regulation Krell specification. (If this were not the case, that 300W into 4 ohm specification would be well out of reach.) Considerable thought has been given to protection, which in this design is by fuses (the bigger Krells use electronic protection operating via power relays). Gross short-circuit and speaker-fault protection is provided by 12A fuses at the output; these are located beneath the output terminals and user-accessible…

Krell KAV-300i integrated amplifier Page 3

Provided that such an amplifier has been appropriately designed with the right components, it will show a gain in performance compared with similarly specified separates. Within its modest frame, the '300i did show this advantage, allowing it to rival more costly two-box combinations. For readers familiar with my personal numbering system, the KAV-300i scored 22 points (25-30 points defines top amplifier sound). For reference, Krell's pre-1992 power amplifiers, which cost 3-4 times the price of the little '300i, when partnered with a suitable preamplifier, also scored ratings in the low 20s…

Krell KAV-300i integrated amplifier Specifications

Sidebar 1: Specifications

Description: Solid-state, remote-controlled, stereo integrated amplifier with five line-level inputs including one tape loop. Power output: 150Wpc into 8 ohms (21.8dBW), 300Wpc into 4 ohms (21.8dBW). THD: <0.06%, midband, rising to 0.3% at 20kHz. Input impedance: 210k ohms. Input overload: 9V RMS. Maximum voltage gain: 36.1dB. Input sensitivity: 55mV unbalanced, 28mV balanced, for full power, volume control maximum. Output impedance: 0.16 ohms. Power consumption at idle/standby: 50W.
Dimensions: 19" W by 15.5" D by 3.7" H.
Serial number of unit reviewed…

Krell KAV-300i integrated amplifier System

Sidebar 2: System

Several good-quality integrated amplifiers were on hand for comparison at the time of this test. These ranged from the inexpensive Exposure XX to the Musical Fidelity A1000, and included the new, expensive Ensemble Evocco. Reference power amplifiers included the recently discontinued Krell KSA-200s, a Naim NAP250, an Audio Research VT150SE and a Conrad-Johnson MV55. Source components included the Krell KPS-20i/l and KPS-30i CD players, while comparison preamps included an Audio Research LS22 and a C-J PV12. Cables were Siltech, van den Hul, and Transparent. Loudspeakers…

Krell KAV-300i integrated amplifier Measurements

Sidebar 3: Measurements

In line with Krell's design practice of recent years the KAV-300i is a low-feedback design, which means that we shouldn't expect extravagant results for damping factor or its more practical equivalent, output impedance. Nor is exceptionally low distortion likely. Nevertheless, Krell amplifiers aim to deliver clean, neutral power to a range of loudspeaker loads and while this base-level design isn't rated for 1 or 2 ohm duty, it does crack the whip powerfully into 4 and 8 ohm loadings.

Noting that my test sample was a European model with a nominal 230V,…

Oracle CD player

After two decades of motorcycling, I recently achieved a long-held goal by buying a bike built by Bimota, a tiny Italian manufacturer. Although Bimota engages in a wide range of activities, from two-stroke engine design to racing, they're best known for their exotic, hand-built street bikes. They always include the very best components and feature cutting-edge engineering and performance, but what they're truly revered for is their style. Bimotas unfailingly combine shapes, textures, and finishes into motorcycles that are most often referred to as "works of art."

A Question of Style…

Oracle CD player Page 2

Both samples of the Oracle seemed to take an unusually long time to burn in. My usual practice—~200 hours using a mix of music and the burn-in tracks from the Sheffield/XLO Test & Burn-in CD (Sheffield Lab 10041-2-T)—barely scratched the surface. Only after a full month of continuous operation did the Oracle seem to settle on a consistent sound—one that bore little resemblance to its original personality. Once set up and burned in, the Oracle performed flawlessly, but the message to anyone auditioning an Oracle (and to anxious editors) is: Be patient, or you risk not hearing what the…