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Dac Headphone Amplifier

The technology behind the sound - Mp3 Explained

MP3 or MPEG-1 Audio Layer 3 is an innovative Digital Audio encoding format which is meant for consumer audio storage and employs a type of lossy data compression algorithm. This compression helps in reducing the quantity of data required to embody the audio recording. It is that benchmark of audio compression which transfers and plays back music on digital audio players, known as MP3 players.

MP3 files are usually created using settings to the tune of 128 kbit/s which often results in 1/11th size of a CD filed produced from initial Audio Source. MP3 player’s recent evolution in the music format helps users to create personalized music lists and allows them to carry thousands of songs with them. Additionally it contains features like video and photo viewing, alarm and calendar functions and not to forget cell phone and even internet service. MP3 players come in two formats viz., Hard-drive-based players and Flash-based players. Hard drive based MP3 players are of high-capacity and have a capability of 20GB onwards.

While considerable players like Apple iPod Classic can hold nearly 30,000 songs and comes with a 120GB capacity. Flash based MP3 players are shockproof and comes in various storage sizes ranging from 512MB to 32GB. Like other Digital Music formats, MP3 also uses a binary code series containing 1s and 0s, when playing a digital file. MP3 players often employ DAC i.e. digital-to-analog converters to turn 1s and 0s into analog signals which are amplified and broadcast with the assistance of Speakers and headphones.
It is the requirement of all MP3 players that a user’s PC should contain USB 1.1 or 2.0 ports this will help in loading songs quickly onto and off the players. Almost all the MP3 players come bundled with software and drivers which allow users to download the songs from a PC.

While purchasing MP3 players always stick to well-known brands like Apple iPod, Creative Zen, Microsoft Zune, SanDisk Sansa, Sony and Archos. MP3 players come in a diverse array of physical sizes; some are so tiny that they can be accommodated even in your keychain while the other large sizes will hardly fit in your hand. The smaller MP3 players suit people in their routine work or while jogging etc. Most of the MP3 players have 2” to 3.5” screens and weigh usually less than 5 ounces.

About the Author

Sophie Milch currently manages purchasing and inventory control for Comnauts.com. Sophie keeps herself busy by making sure our inventory is filled with quality products, the latest and the greatest. Sophie holds a B.Sc. in Mathematics from the University of Waterloo and is frequent contributor to several technology blogs and magazines. When she’s not working; in typical nerd fashion you can catch Sophie twittering friends, beating down Murlocs in World of Warcraft and watching re-runs of the X-files.

Pyle PHE7AB USB DAC Headphone Amplifier $158.93 USB audio decoding and output for PC functioning as a high quality external USB soundcard. Texas Instruments PCM2706 serves as USB receiver. For better sound quality a Wolfson WM8740 serves as digitaltoanalog convertor (DAC) pairing with a high performance operational amplifier from ADI for the DAC circuit. Builtin headphone amplifier utilizing AD8692 and Texas Instruments TPA6130A as pre and poweramp for high performance good resolution low distortion and powerful output. Standard 3.5mm stereo linein jack for portable amplification with conventional audio source. Dual 3.5mm headphone output jack. Convenient design makes it easy to share music between two listeners. Easy to use digital volume control function with great precision and channel balance. Builtin EQ for 3 levels of Bass Boost. Builtin rechargeable 1050 mAH Liion battery for 80 hours of continuous operation. Quality anodized aluminum satin finish case design small and compact ideal to be wrapped together with digital audio player. User selectable USB charging function to help prolong battery lifespan and lower distortion from power supply circuit. User definable startup volume memory and maximum volume limiter to protect user from hearing damage due to loud volume. Automatic keylock feature. User definable sleep timer function and total runtime display. Output Power: 150mW (16O)16mW (300O). Headphone Impedance Range:16 O 300 O. SNR: =95dB (A weight)on linein =100dB (A weight)on USBin. Distortion:

ASUS Xonar Essence One USB DAC and Headphone Amplifier $599.99 Audio Chipset: C-Media CM6631 Sample Rate: 192KHz Digital Audio: 24-bit SNR: 120dB for Front-out SPDIF In: 1 x Coaxial, 1 x Toslink Other Ports: 2 x 3.5mm RCA jack 1 x 6.3mm RCA jack 2 x Balanced Output (XLR) 1 x USB Input Features: Hi-Fi audio via the world’s first 8x symmetrical upsampling While common upsampling USB DACs just transfer whatever audio source to 192kHz indistinguishably, Xonar Essence One upsamples 44.1 / 88.2 / 176.4kHz input to 352.8kHz and 48 / 96 / 192kHz input to 384kHz in a symmetrical way, preserving the originality of your music collection, also upsample bit-rate to 32bit corresponding to the original contents. (Note: 44.1*8=352.8kHz; 48*8=384kHz) Extreme audio clarity with 120dB SNR The SNR of normal USB DAC is about 110dB. With the extremely high SNR (>120dB), Xonar Essenc...

ESI Dr. DAC Prime $479 Dr. DAC Prime simply has everything you need in order to listen to digital music with pristine audio quality on the road or at your home. It can also be used to import your audio to the digital domain with excellent quality. Dr. DAC Prime works with up to 24bit/192kHz and is not only equipped with both an optical (via the included miniplug-toslink adapter) and coaxial S/PDIF input but also with a full USB audio interface (up to 24bit/96kHz) for bit-perfect audio transfer. Optionally the incoming signal can be upsampled to 192kHz, using a TI SRC4382 high end sample rate converter. The actual analog output signal is generated by a TI PCM1796 DAC with 123dB(a) dynamic range, featuring a full differental output with 3 LME49860NA opamps (8 pin) which are conveniently placed on sockets. The built-in headphone amplifier provides 1/8" and 1/4" connectors. The line output volume can be adjusted or fixed to send out the maximum dynamic range. But Dr. DAC Prime is much more: it provides line inputs (AKM AK5386 ADC with 110dB) as well as optical and coaxial S/PDIF inputs, allowing you to record your own signals with excellent audio quality. Dr. DAC Prime works under Windows XP, Windows Vista, Windows 7 as well as Mac OS X even without the installation of any driver software.

PHA40 - Headphone amplifier $16.99 PYLE PHA40 - Headphone amplifier

PHA80 - Headphone amplifier $59.99 PYLE PHA80 - Headphone amplifier

ART HeadAmp6 Headphone Amplifier $149 ART HeadAmp6 Headphone Amplifier

Art Headamp6 Headphone Amplifier $149 ART HeadAmp6 Headphone Amplifier

Ultimate Headphone Amplifier $278.99 ULTIMATE HEADPHONE AMPLIFIER

Esi Dr. Dac Prime $479 Dr. DAC Prime simply has everything you need in order to listen to digital music with pristine audio quality on the road or at your home. It can also be used to import your audio to the digital domain with excellent quality.Dr. DAC Prime works with up to 24bit/192kHz and is not only equipped with both an optical (via the included miniplug-toslink adapter) and coaxial S/PDIF input but also with a full USB audio interface (up to 24bit/96kHz) for bit-perfect audio transfer. Optionally the incoming signal can be upsampled to 192kHz, using a TI SRC4382 high end sample rate converter.The actual analog output signal is generated by a TI PCM1796 DAC with 123dB(a) dynamic range, featuring a full differental output with 3 LME49860NA opamps (8 pin) which are conveniently placed on sockets. The built-in headphone amplifier provides 1/8" and 1/4" connectors. The line output volume can be adjusted or fixed to send out the maximum dynamic range.But Dr. DAC Prime is much more: it provides line inputs (AKM AK5386 ADC with 110dB) as well as optical and coaxial S/PDIF inputs, allowing you to record your own signals with excellent audio quality.Dr. DAC Prime works under Windows XP, Windows Vista, Windows 7 as well as Mac OS X even without the installation of any driver software.Digital to analog converter (and analog to digital converter)USB audio interfaceHeadphone amplifier

Benchmark Dac1 Pre Stereo Preamp/Dac/Headphone Amp Silver $1595 The reference-quality Benchmark DAC1 PRE stereo preamplifier, headphone amp, and computer audio playback device (USB DAC), use the 24-bit, 192-kHz DAC1 digital-to-analog conversion (DAC) system. The DAC1 PRE is the culmination of years of high-precision analog and digital audio circuit design. Benchmark has achieved unprecedented sonic purity in their pro audio systems through an intelligent engineering philosophyestablish a pristine analog delivery path and eliminate digital distortion artifacts. The Benchmark DAC1 PRE continues this tradition of excellence.With 6 stereo inputs and 4 stereo analog outputs, the DAC1 PRE anchors expansive media systems and provides a pristine audio path from source to amplifier. The 6 stereo inputs include an analog input, a USB computer input, an optical input, and 3 coaxial digital inputs. The output section includes stereo XLR balanced, RCA unbalanced, and 2 headphone jacks driven by Benchmark's HPA2 0-ohm headphone amplifier.The acclaimed Benchmark DAC1 D-to-A conversion system Engineers and audiophiles have grown to rely on Benchmark for critical digital audio conversion for more then 10 years. They are consistently finding themselves engaged in the music when using Benchmark digital analog convertersengaged in a way that is rarely achieved with digital converters.The award-winning DAC1 PRE's superior performance has made it the 'Benchmark' of D-to-A converters. The DAC1 PRE gracefully merges the Benchmark DAC1 conversion system with elegant analog circuitry, Benchmark's HPA2 0-ohm headphone amplifier, and essential features and functions.Jitter-Immune UltraLock Clock System Benchmark's proprietary UltraLock clock system achieves an unprecedented immunity to jitter. Many modern (and expensive) converters suffer from significant jitter-induced distortion. If jitter is not effectively addressed, a converter will generate nonmusical sideband tones and digital distortion. Benchmark's highly regarded UltraLock clock system ensures that jitter is never a problem, even under extreme conditions. Even in the presence of extremely high input jitter, no jitter-induced artifacts can be detected on the outputs of the DAC1 PRE (using state-of-the-art testing equipment by Audio Precision). UltraLock will block more then 12.5 UI of jitter (@ 1 kHz). With the UltraLock clock system, the D/A conversion-clock in the DAC1 PRE is totally isolated from the clock of the digital audio source. The UltraLock clock system easily outperforms most well-designed two-stage PLL designs. The bottom line is this: Benchmark converters will consistently and faithfully deliver truthful audio without jitter-induced artifacts, no matter what variables are present.AdvancedUSB Audio Technology The USB interface of the DAC1 PRE operates with Benchmark's unique AdvancedUSB technology. Unlike many USB equipped D/A converters, Benchmark's AdvancedUSB technology supports 24-bit audio at sample rates up to 96 kHz without the installation of any driver

Tascam MH-8 8-Channel Headphone Amplifier $549.99 Tascam MH-8 8-Channel Headphone Amplifier

Nady HPA-8 - 8-Channel Headphone Amplifier $119.99 Nady HPA-8 - 8-Channel Headphone Amplifier

Behringer Micromon MA400 Headphone Amplifier $21.99 Behringer Micromon MA400 Headphone Amplifier

Nady Hpa-8 - 8-Channel Headphone Amplifier $119.99 Nady HPA-8 - 8-Channel Headphone Amplifier

Behringer Micromon Ma400 Headphone Amplifier $21.99 Behringer Micromon MA400 Headphone Amplifier

PreSonus 4-Channel Headphone Amplifier $129.99 This headphone amplifier features 4 stereo headphone amps that reproduce crisp, clear audio and monitor level control and mute options for simple operation.

Pyle Audio / 4-Channel Headphone Amplifier / PHA80 $64.66 Pyle Audio - 4-Channel Headphone Amplifier - PHA80

Pyle Audio / 4-Channel Headphone Amplifier / PHA40 $30.62 Pyle Audio - 4-Channel Headphone Amplifier - PHA40

Behringer AMP800 MiniAMP 4-Channel Stereo Headphone Amplifier $64.99 Behringer AMP800 MiniAMP 4-Channel Stereo Headphone Amplifier

Live Wire Solutions HA04 4-Channel Headphone Amplifier $49.99 Live Wire Solutions HA04 4-Channel Headphone Amplifier

Live Wire Solutions Ha04 4-Channel Headphone Amplifier $49.99 Live Wire Solutions HA04 4-Channel Headphone Amplifier

Behringer Amp800 Miniamp 4-Channel Stereo Headphone Amplifier $49.99 Behringer AMP800 MiniAMP 4-Channel Stereo Headphone Amplifier

Fiio E7 1.1-inch OLED USB DAC 3.5mm Earphone Volume Booster Power Amplifier (Black) $96.54 - USB audio decoding and output for PX, functioning as a high quality external USB soundcard- Standard 3.5mm stereo line-in jack for portable amplification with conventional audio source- Dual 3.5mm headphone output jack- 1.1 inch OLED LCD- Built-in rechargeable 1050mAH Li-ion battery- Output Power: 150mW (16Ohm); 16mW (300Ohm)- Headphone Impedance Range: 16 Ohm ~ 300 Ohm- SNR: =95dB (A weighted) on line-in; =100dB (A weighted) on USB-in- Distortion:

Asus Xonar Essence One External Sound Box $1143.38 USB DAC & HEADPHONE AMPLIFIER PERPHIFI AUDIO 120DB SNR XLR OUTPUTS

ESI Dr. DAC Nano $99.95 Dr. DAC Nano provides 2 output channels via both analog and a digital optical S/PDIF connection.The analog output features a high quality DAC that handle up to 24-bit/96kHz. The digital output features an optical miniplug connector.Dr. DAC Nano works under Windows XP, Windows Vista, Windows 7 as well as Mac OS X even without the installation of any driver software - perfect Plug & Play.digital to analog converterUSB audio interfaceoptical S/PDIF transmitterheadphone amplifier

Esi Dr. Dac Nano $99.95 Dr. DAC Nano provides 2 output channels via both analog and a digital optical S/PDIF connection.The analog output features a high quality DAC that handle up to 24-bit/96kHz. The digital output features an optical miniplug connector.Dr. DAC Nano works under Windows XP, Windows Vista, Windows 7 as well as Mac OS X even without the installation of any driver software - perfect Plug & Play.digital to analog converterUSB audio interfaceoptical S/PDIF transmitterheadphone amplifier

PylePro PHA40 Signal Amplifier $60.77 4-Channel Headphone Amplifier

Used Behringer Ha4700 Headphone Amplifier @131 01/29/12 $69.99 In Store Used USED BEHRINGER HA4700 HEADPHONE AMPLIFIER @131 01/29/12

Fiio E7 1.1' OLED USB DAC 3.5mm Earphone Volume Booster Power Amplifier (Black) $82.6 - USB audio decoding and output for PX, functioning as a high quality external USB soundcard- Standard 3.5mm stereo line-in jack for portable amplification with conventional audio source- Dual 3.5mm headphone output jack- 1.1 inch OLED LCD- Built-in rechargeable 1050mAH Li-ion battery- Output Power: 150mW (16Ohm); 16mW (300Ohm)- Headphone Impedance Range: 16 Ohm ~ 300 Ohm- SNR: =95dB (A weighted) on line-in; =100dB (A weighted) on USB-in- Distortion:

Samson 4-Channel Headphone Amplifier - Blue $49.99 This headphone amplifier features individual volume control on each output for precise control. An aluminum extrusion chassis and rubber bumper feet provide a durable design.

Pyle Pro PHA80 Signal Amplifier $148.73 4-Channel Headphone Amplifier

Behringer Micromon Monitor Headphone Amplifier $21.99 This monitor headphone amplifier lets you adjust the levels of a microphone and a mixer to help you hear yourself and be in tune with the rest of the band. The 1/4" and 1/8" jacks accommodate most headphones for versatile use.

Amplifier $140.19 Generally, an amplifier or simply amp, is any device that changes, usually increases, the amplitude of a signal. The relationship of the input to the output of an amplifierusually expressed as a function of the input frequencyis called the transfer function of the amplifier, and the magnitude of the transfer function is termed the gain. In popular use, the term usually describes an electronic amplifier, in which the input signal is usually voltage or current. In audio applications, amplifiers operate loudspeakers used in PA systems to make the human voice louder or play recorded music. Amplifiers may be classified according to the input (source) they are designed to amplify (such as a guitar amplifier, to perform with an electric guitar), the device they are intended to drive (such as a headphone amplifier), the frequency range of the signals (Audio, IF, RF, and VHF amplifiers, for example), whether they invert the signal (inverting amplifiers and noninverting amplifiers), or the type of device used in the amplification (valve or tube amplifiers, FET amplifiers, etc.). Author: Miller, Frederic P./ Vandome, Agnes F./ McBrewster, John Binding Type: Paperback Number of Pages: 220 Publication Date: 2009/11/25 Language: English Dimensions: 5.98 x 9.01 x 0.50 inches