It starts quietly enough, with a simple falling-fifth motif, but the first movement of Sergei Rachmaninoff's neglected Piano Sonata 1 develops into a work of epic proportions nearly 40 minutes in length, with haunting melodies, massive dynamic contrasts, and lush, sensual harmonies.

<B>Scene the First.</B> You are sitting in a concert hall, dead center, row M; the cellist walks on to the stage, sits down and starts to play the prelude to the first of <A HREF="http://www.stereophile.com/musicrecordings/1192yoyoma">Bach's solo cello suites</A>, that intricate unfolding of a rhapsodic melodic line within the tight framework of an implied chordal structure. Melody, harmony, rhythm&mdash;none exist at any one point of time in this most exquisite of Bach's solo instrumental writing, yet the skill of the composer, coupled with the artistry of the musician, allow you to perceive the abstract as reality.

If any single link in the audio chain should be free of sonic personality, it's the preamplifier. Though a preamplifier's basic job description is "source selector with volume control," from hi-fi's earliest days preamps have been the designated dashboard: the more dials, switches, and lights, the better. All that control came at the cost of quiet, transparency, and tonal neutrality. Still, the quixotic quest for the mythical "straight wire with gain" continued to lead to minimalist designs, including impractical unbuffered "passive" preamps, in which cable length, thus capacitance, affected frequency response.

If any single link in the audio chain should be free of sonic personality, it's the preamplifier. Though a preamplifier's basic job description is "source selector with volume control," from hi-fi's earliest days preamps have been the designated dashboard: the more dials, switches, and lights, the better. All that control came at the cost of quiet, transparency, and tonal neutrality. Still, the quixotic quest for the mythical "straight wire with gain" continued to lead to minimalist designs, including impractical unbuffered "passive" preamps, in which cable length, thus capacitance, affected frequency response.