The distinct UE sound signature provides pure, undiluted audio with a wide-open soundstage and a remarkable level of detail in all your music.

ENGADGET: Logitech unveils lineup of UE headphones for in, on and around your ears (hands-on)

In terms of pure sound, then, there's more focus on exactly what's played, and listening to the intimate dialogue among these three fine musicians, it's clear that cellist Alisa Weilerstein comes from a special family and a special musical circumstance.

NPR: Family Affair, and Dvorak's Invited

Samsung's 7.1 Channel Home Theater System (model HT-F9750W) was created to be the perfect counterpart for Samsung's 2013 TVs, with a Gallium Nitride (GaN) amplifier that delivers pure sound, and design and usability features that bring home a totally seamless experience.

ENGADGET: Samsung introduces its CES audio hardware, claims a world first

The original was recorded in 1965 with a pure Motown sound.

FORBES: Irrational Games Makes Serious Misstep with 'BioShock: Infinite' Soundtrack Offering

The phenomenon that is Beats by Dre is testament to the fact that, for a large number of people, pure, untouched sound isn't of primary concern.

ENGADGET: blogger-avatar

The MOMENTUM's sound is like its design: pure and unadulterated.

ENGADGET: Sennheiser launches the Momentum retro-cans and CX890i earbuds

Samsung's Vacuum Tube Soundbar (model HW-F750) resolves consumers' desire for pure power and warm, natural sound by integrating a vacuum tube amplifier into a soundbar for the first time.

ENGADGET: Samsung introduces its CES audio hardware, claims a world first

Parrot engineers added a proprietary algorithmic processor to this system: the Sound Flex, which respects the musical for a pure and perfectly balanced musical image.

ENGADGET: Parrot Zikmu Solo reaches US in November, makes a tower of wireless sound yours for $999

Now, using the Pure i-20, and its built-in DAC, recordings sound just as good as CDs played on my very respectable NAD C542 compact disk player (my other not-too-new components are a NAD 7100 stereo receiver and Paradigm Studio 20 v. 4 speakers).

FORBES: How to Get True High-End Audio From Your iPhone