A device that accepts a small signal and outputs a larger signal that generally matches the waveform characteristics of the input. Amplifiers are available to boost electrical and optical signals. See amplifier classes, Class D amplifier and PWM.
 | Reproduced with permission from Computer Desktop Encyclopedia. Copyright (c) 1981-2009 The Computer Language Company Inc. All rights reserved. |
Additional Resources
- Onkyo SKS-HT870
- Onkyo is known for having speaker expertise, even though it's not primarily a speaker company. That's because of Onkyo's success selling home-theater-in-a-box systems HTIBs, which combine a speaker system and an AV receiver in a single box, taking some of the confusion out of putting together your own system. The...
- Product reviews 2009-10-30
- Trick or Treat: Five spooky gadgets and accessories for Halloween
- If orange isn't your favorite color, there are plenty of other quirky, spooky ways to spruce up your gadget collection this Halloween. Here are five gadgets and accessories that would otherwise be considered odd, if it weren't time to celebrate All Hallows' Eve. ...
- Blog posts 2009-10-30
- Onkyo HT-S7200
- Photo gallery:Onkyo HT-S7200"True" home theater fans may look down on home-theater-in-a-box systems, but sometimes that elitist attitude is unwarranted. The Onkyo HT-S7200 may technically be an HTIB, but that's just because it comes in a giant box; the system is composed of two separate components, the SKS-HT870 7.1 speaker package...
- Product reviews 2009-10-27
- Tritton AX900
- Among all the video game accessories available today, no other market seems to be expanding as rapidly as the video game headset. With most current-generation consoles able to produce 5.1 surround sound, finding a headset solution to handle such a request is now much easier than before. We've tested a...
- Product reviews 2009-10-22
- Ultrasone Edition 8
- We've reviewed a number of Ultrasone headphones over the years--everything from iPod-inspired iCans to the luxurious HFI-2200s. But the new Edition 8s are, in so many ways, a very different Ultrasone. First, the Edition 8s have, according to Ultrasone, a completely original design that doesn't share any parts with...
- Product reviews 2009-10-21
- Gadget Gal's daily deals: Acer Aspire One netbook, Sony CyberShot digital camera, KEF PicoForte 1 iPod speaker
- A KEF PicoForte 1 iPod speaker system, an Acer Aspire One netbook, and a Sony CyberShot 12.1-megapixel digital camera. Here are your daily deals for Friday, October 16, straight form the Gadget Gal: 1. Get the KEF PicoForte 1 Speaker System for iPod for $99.88 at OneCall. ...
- Blog posts 2009-10-16
- Sennheiser HD 800
- Model changes at the upper end of Sennheiser's headphone line don't happen very often. The previous flagship--the still available HD 650s--were introduced in 2003, and remain in the line. Their predecessor, the HD 600s, came out more than a decade ago, and are still popular with audiophiles. I've reviewed both,...
- Product reviews 2009-10-15
- Grado PS1000
- Grado is one of America's oldest hi-fi companies. In the 1950s it manufactured phono cartridges, turntables, and speakers. While Grado still makes a full line of highly regarded cartridges (budget-priced all the way up to high-end models), it's perhaps better known today for its headphones, which spring from the professional...
- Product reviews 2009-10-15
- Tritton AX 720
- Among all the video game accessories available today, no other market seems to be expanding as rapidly as the video game headset. With most current-generation consoles able to produce 5.1 surround sound, finding a headset solution to handle such a request is now much easier than before. We've tested...
- Product reviews 2009-10-14
- A brain-computer interface that communicates thoughts between people
- New research from the University of Southampton has demonstrated that it is possible for communication from person to person through the power of thought alone. Looking to take brain-computer interfaces BCI to the next level, Dr. Christopher James from the University’s Institute of Sound and Vibration Research,...
- Blog posts 2009-10-06
- LaCie and Cabasse join forces to release Sound2 hi-fi speakers
- LaCie, a company that normally provides integrated storage solutions, announced today that it has teamed up with Cabasse, a company well-known for its high-quality hi-fi sound systems, to introduce the LaCie Sound2 high-end speakers. The speakers are intended to be used as computer...
- Blog posts 2009-09-30
- Gadget Gal's daily deals: Philips universal remote, Logitech keyboard, Kodak EasyShare digital camera
- A Philips 8-device universal remote, a Logitech diNovo keyboard, and a Kodak EasyShare 10.2-megapixel camera. Here are your daily deals for Wednesday, September 16, straight from the Gadget Gal: 1. Get the Philips SRU8008/27 Prestigo 8-Device Universal Remote with 1.4-inch LCD for $19.99 today only at...
- Blog posts 2009-09-16
- Sony Ericsson MBS-100 portable Bluetooth speaker
- Sony Ericsson's MBS-100 portable Bluetooth speaker has no problem being noticed. If you didn't know better, you'd swear the little $69 speaker orb might be an eyeball plucked from some giant alien crustacean, or a Venusian satellite that fell to earth. The softball-sized speaker stands 3.5 inches tall by 4...
- Product reviews 2009-08-27
- Should Apple make its own TV?
- yes!I have been looking for a smart tv for a while and it came only as a PC connected to a big monitor.Somebody has to break the ice, and, if it's Apple, more power to them.No!Can you imagine an Apple TV:It will be priced twice as much as any other...
- Discussion threads 2009-08-21
- M-Audio Studiophile AV 30
- The M-Audio brand name may mean more to musicians and music producers than gamers and iTunes junkies, but all you really need to know is that the company makes one of the best-sounding PC and multimedia speakers you can buy. Unfortunately, those speakers are called the Studiophile AV 40, they...
- Product reviews 2009-08-13
- Linksys DMC250 Director - Wireless-N Music Player w/ Integrated Amplifier
- Cisco Media Love Cisco's home media solution with their Media Player/Director and Media Hub. Not to forget the part that the speakers are supposed to be Harmon-Kardon OEM-ed and they can rock the house at full volume. There were a few hurdles in getting it all started and needed couple...
- Discussion threads 2009-08-07
- Panasonic SC-BT300
- Photo gallery:Panasonic SC-BT300Panasonic released one of the first Blu-ray home-theater-in-a-box HTIB systems in 2008, the SC-BT100, but we didn't bother to review it. The reason: it was still a Profile 1.1 disc player and its high price tag made it easier to put together a great system of separate components...
- Product reviews 2009-08-03
- El Kameleon JVC EXAD KD-AVX77 media player
- When we last saw JVC's El Kameleon car audio receiver, we awarded it our Editors' Choice award for its innovative interface and expandability. However, we wished that the unit featured a touch screen instead of a touch pad. With the new El Kameleon KD-AVX77, we get our wish. The new...
- Product reviews 2009-07-31
- Sonos Bundle BU250
- Photo gallery:Sonos Bundle BU250Sonos is back for 2009 with a new version of its signature Digital Audio System. Like earlier iterations of the Sonos product, the new "Bundle 250" allows you to wirelessly access your computer's digital music collection as well as a wide range of Internet radio and streaming-audio...
- Product reviews 2009-07-28
- Logitech Speaker System Z320
- Logitech has four new PC speakers for 2009 ranging in price from $69.99 to $129.99. None of the new speakers are USB-powered and all feature what the company calls "360-degree sound," which "helps project audio evenly in all directions." The Z320 speakers reviewed here are relatively compact, measuring about 7.5...
- Product reviews 2009-07-23
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