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In high-end circles, the sonic repute of integrated-circuit op-amps (from "operational amplifier") is, at best, checkered. Of course, the expertise with which they are used and the parts they're used with can make all the difference. For example, my DIY preamplifier design, "AMP-02," published in Hi-Fi News & Record Review in 1989–90, and my earlier (1983–84) AMP-01 (footnote 1), I used the better IC op-amps of the time throughout. Both units were thought to outperform cost-no-object commercial units of the time that employed discrete transistors and even tubes, and only indicate what's possible.

The $1200 D-105u, the top of Luxman's CD-player line, is novel in its twin-triode vacuum-tube amplification in the analog output stage. This configuration is said to provide high linearity with low distortion and that hard-to-quantify musicality found in tubed products. In addition, the D-105u incorporates an anti-vibration laser pick-up mechanism and a high-mass magnetic disc clamper, the latter feature said to mass-load the disc center to minimize spindle-motor microvibration, thus improving tracking accuracy for lowest error rate.

We're 30 years into a cartridge design revolution, particularly at the top end of the market, where manufacturers charge upward of $10,000 for their best efforts: prices that well-off consumers have amply proved they are willing to pay. There doesn't seem to be an innovation end in sight.

In February 1994, when I reviewed the pricey ($12,900 with amplifier) Sennheiser Orpheus headphone system—HE 90 headphones and HEV 90 D/A processor/amplifier—I commented that the company had a similar, but less expensive, alternative available: the HE 60 headphones combined with the HEV 70 amplifier. At the headphone end, the HE 60s aren't so different from the HE 90s furnished with the Orpheus system. Both are extremely lightweight and supremely comfortable—even for long listening sessions (I logged up to four hours without a break on the HE 60s). In fact, the less-expensive HE 60s are about 100gm—4 ounces—lighter than the HE 90s.

Apart from the Beatles and Hendrix I heard in my audiophile father's basement, one of my earliest rock'n'roll memories involved a multipurpose record player at school. In third grade, six of us were moved as a separate group to a round table to watch a filmstrip in a darker part of a large, open-plan classroom. A clunky old record player in a self-contained carrying case with a half-dozen headphone jacks sat on the table.

The catastrophic February 6 fire at the factory where Apollo Masters produced LP-mastering lacquers—flat aluminum discs covered with nitrocellulose lacquer—will be old news by the time this column gets to you, but the repercussions of the loss will be ongoing for at least the next year and probably beyond.

The email from Herb Reichert was intriguing. "I am, with great difficulty writing about HoloAudio's new two-chassis May DAC," he wrote. "It is death quiet and very natural. It makes every recording sound non-digital."

Once Herb had finished writing his review of the HoloAudio for the August issue's Gramophone Dreams column, I sped to his Bed-Stuy bothy and grabbed the May DAC, both to get it on my test bench and to take a listen for myself.