Apple's iPod came of age in the fall of 2003, when, with the release of iTunes 4.5, the player was no longer restricted to lossy compressed MP3 or AAC files. Instead, it could play uncompressed or losslessly compressed files with true "CD quality"; users no longer had to compromise sound quality to benefit from the iPod's convenience.

Enter Astell&Kern. At the beginning of 2013, this brand from iRiver, a Korean portable media company, introduced its AK100, a portable player costing a dollar short of $700 and capable of handling 24-bit files with sample rates of up to 192kHz.

The only thing better than a review that writes itself is a product with a compelling story. Although the latter asks a little more of us here, it's usually the more enduring pleasure.

So it goes with the new AX-5 amplifier ($9950) from Ayre Acoustics, in which designer Charles Hansen has both revived an overlooked technology from a half-century ago and brought to market a more affordable embodiment of one of his own most well-received products.

For over three decades, I have felt compelled to turn people on to music. Throughout my career as a DJ, all of my endeavors have been linked by the desire to spread the joy of listening to records, in the hope that people would feel something like the emotional resonance I feel. My Classic Album Sundays adventure—see www.stereophile.com/content/classic-album-sundays-bellwether— was born from this lifelong dedication to musical curating, and propelled by a eureka hi-fi moment.

For all those who hold dear the notion that jazz has seen its best days—that, like classical music, it now lacks star power (no more Birds, Mileses, or Coltranes on the marquees), has already said much of what it had to say, and what's left is merely esoteric noodling or soulless bop-by-rote mopping up—there is Terence Blanchard. Once the archetypal sideman, this New Orleanian contemporary of Donald Harrison and Wynton Marsalis has become a successful leader. His poise, generous spirit, and workaholic lifestyle —not to mention his instantly recognizable trumpet tone—have quietly made him one of the leading figures in today's jazz mainstream.