The speaker uses a 20 watt high-performance, low-distortion digital amplifier to deliver energy efficient sound.

ENGADGET: Klipsch LightSpeaker makes whole home audio as simple as screwing in a light bulb (hands-on)

You also get a small digital amplifier with a stereo headphone jack.

CNN: Up close and personal with the Mac G4 Cube

Other new features include a new digital amplifier, a Bluetooth remote, and a settings memory to remember your source, volume and EQ levels for next time.

ENGADGET

This flagship HTS incorporates Samsung's proprietary vacuum tube and digital amplifier, as well as the latest in Smart TV features to create the best entertainment experience available.

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

The Griffin Twenty is a compact digital amplifier that brings the magic of AirPlay to a pair of bookshelf or floor-standing speakers, so you can beam audio wirelessly from a computer, iPhone, iPad or iPod Touch.

WSJ: Stereo Sound, Rekindled

After recently having presented its first digital headphone amplifier, the audio specialist Sennheiser announces at IFA 2012 that it will also launch an analogue version of the device, available in the U.S. later this fall.

ENGADGET: Sennheiser unveils HDVA 600 analog headphone amp, asks for $1,600

Direct Drive Image Light Amplifier, while DLP stands for Digital Light Processing.

ENGADGET: D-ILA and DLP: what are they? HD

Case in point: the Icon iDo integrated digital-to-analog converter (also called a DAC) and integrated amplifier is geared specifically toward Apple portable devices like the iPhone and iPad.

FORBES: How Nuforce is Reinventing High-End Audio for the Digital Age