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MP3 Accessories

Speakers

Speakers Article

Digital speakers are an impractical but venerable technology, having been the subject of experiments by Bell Labs as far back as the 1920s. The design is simple; each bit drives an independent speaker driver. Increasingly significant bits drive speakers of twice the area of the previous (often in a ring around the previous driver). A value of "1" causes that driver to be driven to full amplitude; a value of "0" causes it to be completely shut off.

There are two problems with this design which has led to it being abandoned as impractical for the present. For a reasonable number of bits (required for adequate sound reproduction quality), the size of the system becomes very large. Secondly, due to analog digital conversion, the effect of aliasing is unavoidable, so that the audio output is "reflected" at equal amplitude in the frequency domain, on the other side of the sampling frequency, causing an unacceptably high level of ultrasonics to accompany the desired output.

The term "digital" or "digital-ready" is often used for marketing purposes on speakers or headphones, but these systems are not digital in the sense described above. Rather, this is a somewhat deceptive marketing tactic, in which the manufacturer is trying to capitalize on the popularity of digital sound recordings and equipment.

Speakers Items

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WHITE FOLDABLE SPEAKER DOCK FOR CREATIVE ZEN VISION M

$4.99
New iPod Nano Portable Docking Station Speakers SEALED!

$6.95
BLACK DESKTOP USB DOCK SPEAKER for IPOD CLASSIC TOUCH

$6.87
Portable Zipper Bag Case Amplifier Speaker for iPod MP3

$45.00
NEW PORTABLE DOCK SPEAKER FOR APPLE IPOD MINI NANO MP3

$7.11
iBlaster Express iPod/MP3 Portable Speaker - Black

$6.99
WHITE FOLDABLE SPEAKER DOCK FOR CREATIVE ZEN VISION M

$4.99
Portable Mini Bass Speakers for iPod Nano Video Touch

$20.50
APPLE SPEAKER FOR IPOD NANO VIDEO Touch iPhone Classic

$4.99
NEW PORTABLE DOCK SPEAKER FOR APPLE IPOD MINI NANO MP3

$6.90
NEW - HANNAH MONTANA SPEAKER SYSTEM FOR IPOD FREE SHIP

$31.99
Brand New MP3/iPod Nano Speaker/Portable Docking System

$6.99
Logitech mm22 Portable Speakers for iPod

$30.00
AS-IS Logitech AudioStation iPod Speaker System

$0.99
MP3 EXTERNAL SPEAKER CASE

$0.99
Battery Powered Speakers System for iPod Touch/Classic

$2.49
ILIVE PINK PORTABLE IPOD BOOMBOX DOCK STATION SPEAKERS

$44.90
New iPod Nano Portable Docking Station Speakers SEALED!

$6.95
Altec Lansing MHP306 MUZX-Series Earbuds with "Buddies"

$0.99
NEW PORTABLE DOCK SPEAKER FOR APPLE IPOD MINI NANO MP3

$7.11
Battery Powered Speakers System for iPod Touch/Classic

$1.99
Dock Station Speaker for itouch iphone ipod nano mp3 #1

$6.87
Twin Hexagon Wooden Framework Speakers for MP3/4 Player

$20.00
New BLACK Stereo Speaker Dock For Apple iPhone iPod MP3

$6.88
Altec Lansing im500 Speaker System for iPod nano

$10.50
Power Tour Stereo Amp & Speakers

$0.99
New iPod Nano Portable Docking Station Speakers SEALED!

$6.95
New iPod Nano Portable Docking Station Speakers SEALED!

$6.95
Battery Powered Speakers System for iPod Touch/Classic

$1.99
Mini Portable Stereo Speaker for iPod / NANO 2 / MP3

$0.01
AM/FM 2.1 iPod dock, Supports iPod Touch and 3g Nano

$40.00
PORTABLE SPEAKERS FOR IPOD MP3 MP4 NOTEBOOK LAPTOP PC

$1.99
Docking Station Speaker for iPOD MINI VIDEO NANO -WHITE

$6.97
Jabra Klipsch S5010 Stereo Speaker Ipod MP3 Phone Dock

$7.99
AS-IS Logitech AudioStation iPod Speaker System

$0.99
black DOCKING STATION TRAVEL SPEAKER for All IPOD MP3

$6.87
SONIC IMPACT i-P23 ROXY SPEAKERS FOR APPLE IPODS NEW

$30.01
New iPod Nano Portable Docking Station Speakers SEALED!

$6.95
LOGITECH SPEAKERS FOR iPOD with BASS BOOST NEW!!!!

$9.99
GLOBAL MP3 SPEAKER SYSTEM FOR IPOD MP3 PLAYERS

$0.99
STEREO IPOD DOCK WITH CD PLAYER REFURB

$19.99
IPOD ALARM CLOCK DOCKING STATION IMODE IP200

$24.99
Mini Portable Stereo Speaker for iPod / NANO 2 / MP3

$1.75
PORTABLE DOCKING SPEAKER FOR iPOD MINI/NANO/VIDEO/MP3

$4.99
Mini Portable Stereo Speaker for iPod / NANO 2 / MP3

$1.00
NEW WITHOUT BOX - I DREAM Speaker Pillow for the IPOD!!

$0.99
NEW PORTABLE DOCK SPEAKER FOR APPLE IPOD MINI NANO MP3

$7.29
Mini Portable Stereo Speaker for iPod / NANO 2 / MP3

$1.00
NEW DOG Speaker For Laptop Desktop Computer iPOD Zune

$3.99
JBL On Stage II Speaker for iPod w/ Remote Control!

$10.00
Altec Lansing iM600 iPod Docking System

$58.00
PORTABLE DOCKING SPEAKER FOR iPOD MINI/NANO/VIDEO/MP3

$4.99
New iPod Nano Portable Docking Station Speakers SEALED!

$6.95
New iPod Nano Portable Docking Station Speakers SEALED!

$6.95
NEW GPX SA208S Portable Speaker for iPod Shuffle - Sil

$24.69
New iPod Nano Portable Docking Station Speakers SEALED!

$6.95
JBL On Stage Micro Portable IPod Speakers (#7036-881)

$8.00
NEW PORTABLE DOCK SPEAKER FOR APPLE IPOD MINI NANO MP3

$6.87
NEW PORTABLE DOCK SPEAKER FOR APPLE IPOD MINI NANO MP3

$7.11
New iPod Nano Portable Docking Station Speakers SEALED!

$6.95
BLACK DOCK STATION SPEAKER FOR IPOD NANO VIDEO MINI MP3

$8.99
KNG AMERICA FUNKIT DJ ANIMATED IPOD SPEAKER SYSTEM

$50.00
NEW PORTABLE DOCK SPEAKER FOR APPLE IPOD MINI NANO MP3

$7.11
NEW Logitech AudioStation iPod Speaker 970217-0403

$79.99
BLUE DOCK STATION SPEAKER FOR IPOD NANO VIDEO MINI MP3

$8.99
Orange Snail Easy Carry USB 3.5mm Music Audio Speakers

$9.00
NEW PORTABLE DOCK SPEAKER FOR APPLE IPOD MINI NANO MP3

$7.29
2000W 5.1CH Video Game 6pcs Led Speaker for Ipod Video

$39.99
Mini Portable Stereo Speaker 4 iPod Nano Photo Video

$3.99
NEW APPLE SPEAKER FOR IPOD NANO 1/2/4/8GB VIDEO/MP3/MP4

$6.87
iPod Docking Foldable Portable Speaker Nano Photo SP4

$4.99
Mini Amplifier Speaker Black 4 IPOD NANO MP3 MP4 Video

$3.99
Creative TravelSound 500 Speakers New Sealed

$69.99
JVC™ KS-SB200 SPEAKER SIRIUS® iPod/ZUNE COMPATIBLE NEW!

$7.97
Altec Lansing im600 Digital Speaker System for iPod

$29.00
BLACK Stereo Speaker Dock For Apple iPod Touch iTouch

$6.87
MP3 Player 3.5mm HiFi RCA dock retractable audio cable

$1.99
New Hi-Fi Dual Channel iPod mp3 CD Speakers Colour LED

$9.99
iPOD SOUND 2X PLUS HIGH QUALITY PORTABLE SPEAKER SYSTEM

$7.99
PORTABLE DOCKING SPEAKER FOR iPOD MINI/NANO/VIDEO/MP3

$6.87
New iPod Nano Portable Docking Station Speakers SEALED!

$6.95
FOLDABLE MINI USB SPEAKER FOR IPOD VIDEO IPHONE TOUCH

$3.33
FOLDABLE MINI USB SPEAKER FOR IPOD VIDEO IPHONE TOUCH

$3.33
APPLE SPEAKER FOR IPOD NANO VIDEO Touch iPhone Classic

$4.99
Super Mini Sound Box Speaker

$9.99
New BLACK Stereo Speaker Dock For Apple iPhone iPod MP3

$6.88
New Ultra IPod 2.1 Audio System with Subwoofer

$25.00
Insignia Portable Boombox for iPod with Remote-White

$10.50
NEW JENSEN JP500 SPEAKERS

$35.99
JBL on time Music Time Machine Alarm Clock for ipod

$89.99
Logitech mm50 Portable Speaker for ipod

$22.51
NEW PORTABLE DOCK SPEAKER FOR APPLE IPOD MINI NANO MP3

$6.90
iHome2go Portable iPod Speakers

$5.00
Curtis iMode IP215B Black iPod Dock Speaker Alarm Clock

$34.99
iPod Docking Foldable Portable Speaker Nano Photo SP4

$4.99
BLACK Portable Docking Station Speaker for iPOD NANO

$6.87