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 Packburn 323A Audio Noise Supressor Vinyl Restoration Audiophile Processor 323 A US $995.00 
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 M-Audio Audiophile 24 96 4x4 Audio Card with MIDI 9900-50765-00 US $149.95
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 M-Audio Audiophile 192k High Definition 4x4 Audio Card w MIDI 9900-50768-00 US $239.95
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 M-Audio 9900-50768-00 Audiophile 192 Hi-Def Aud Card US $89.99
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 M-Audio US41750 Audiophile 192 Hi-Def Aud Card 9900-50768-00 US $89.98
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 Crown Amp PSA-2 Stereo Pro Audio Audiophile Amplifier 915 W, OC-150, rack, + US $1,200.00
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 M-AUDIO AUDIOPHILE FIREWIRE US $75.00
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 M-AUDIO AUDIOPHILE 2496 US $50.00
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 M-Audio Audiophile 192 PCI Interface US $179.00
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 Audiophile 192 - High-Definition 4-In/4-Out Audio Card with Digital I/O and MIDI US $176.82
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 Audiophile 2496 - 4-In/4-Out Audio Card with MIDI and Digital I/O US $103.14
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 M-Audio Audiophile 192 192kHz sampling rate, digital I/O, balanced analog I/O US $95.00
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 ART USBPhonoPlus V2 - Audiophile Computer / DJ Interface - USB Audio Interface US $147.95
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 Behringer UFO202 Audiophile USB Audio Interface with Phono to Line Preamp US $58.20
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 M-Audio Audiophile 192 High-Def 4-In/4-Out Audio Card US $179.00
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 M-Audio Audiophile 2496 4-In/4-Out Audio Card w/ MIDI US $99.00
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 Audio-Technica ATH-W1000X Audiophile Wooden Headphone US $543.21
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 M-Audio Audiophile 2496 Hi-Quality 24-96 PCI Audio/MIDI US $110.63
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 M Audio Delta Audiophile 2496 Professional Audio Card US $112.96
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 M Audio AudioPhile 2496 4 In /4 Out Professional Audio Card with MIDI US $129.99
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 Behringer UFO202 U-Phono Audiophile USB Audio Interface US $33.99
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 M-Audio Audiophile 2496: Soundcard and Interface 1/4 in-1/4 out 24-Bit 96KHz NEW US $76.74
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 Behringer U-PHONO UFO202 Audiophile USB/Audio Interface w Phono Preamp US $33.49
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 M-Audio 9900-50768-00-Audiophile 192 Hi-Def Aud Card - Kit US $99.73
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 M-Audio Audiophile 192 Pro Audio Recording SOUND CARD US $179.99
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 M-Audio Audiophile 2496 PCI Digital Audio Card US $99.00
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 M-Audo - Audiophile 192 - 4x4 Audio Card With Digital I/O And MIDI US $179.99
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 M-AUDIO AUDIOPHILE 2496 PCI SOUND CARD 2 in/2 out, 24-bit/96 kHz S/PDIF and MIDI US $99.00
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 M-AUDIO AUDIOPHILE 2496 PCI SOUND CARD NEW $6 US SHIP US $99.00
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 M-Audio Audiophile 2496 24-bit 96KHz PCI Interface Card FREE NEXT DAY AIR! US $79.00
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 M-Audio Audiophile 192kHz Audio Interface PCI Card+MIDI FREE NEXT DAY AIR! US $99.00
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 M-Audio Audiophile 192 PCI Digital Audio Card New US $89.99
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 M-Audio Audiophile 192 kHz PCI Audio Interface MIDI NEW US $139.00
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 Audio-Technica ATH-A700 Audiophile Closed-back Dynamic Headphones US $120.00
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 Audio-Technica ATH-A900x Audiophile Closed-back Dynamic Headphones #ATH-A900X US $240.99
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 Antex SC2000 Audiophile Professional AES Digital Balanced Audio Production Card US $69.99
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Audio Audiophile
A Look At Some Of The Latest Wireless Audio Toys
Newest wireless audio devices such as iPods, wireless headphones and cell phones support latest wireless protocols. These protocols are supposed to cut the cord and provide perfect high-fidelity audio. We will look at some of the newest devices to learn which applications they work for.
A number of products are available with wireless already built in while some others, particularly streaming audio products, frequently have optional wireless functionality. Latest touch-screen iPods and iPhones already have WiFi and Bluetooth built in.
The Bluetooth protocol is a fairly low-cost option. However, its limitations have an impact on high-quality audio applications and are often ignored.
1) Limited operating range
The range of Bluetooth devices is generally just 30 ft. This excludes Bluetooth from multi-room applications.
2) Inadequate data transmission capacity
Bluetooth reliably supports data transmission rates of roughly 1 Mbps only which is not adequate for uncompressed CD-quality audio. For that reason Bluetooth utilizes audio compression. This is less critical however for compressed audio such as MP3 audio but excludes Bluetooth from use in high-quality audio applications.
3) Audio latency
The signal sent via Bluetooth will undergo a slight delay of a minimum of 10 ms. This is for the most part because of the audio compression. While being uncritical for MP3 players, this delay may be a problem for video and other real-time applications.
4) Lacking multi-headphone support
Bluetooth is relatively limited in regard to supporting streaming to numerous headphones. Streaming to several headphones is useful for several people wanting to listen to the same transmitter. This is less of a problem for MP3 player applications.
Another common protocol is WiFi which supports uncompressed audio but also has drawbacks simultaneously streaming to multiple receivers. It is practical for streaming music from a PC as a result of the high availability but is in general not used in wireless headphone products due to the relatively high power consumption of WiFi.
While newest-generation wireless speakers and wireless amplifier products utilize proprietary digital technologies, entry-level products frequently still rely on FM transmission which is noisy and has high audio distortion and high susceptibility to radio interference.
More advanced wireless protocols are based on digital formats which get rid of audio degradation and incorporate advanced features like error correction to deal with interference from competing wireless devices.
Advanced wireless amplifier products support uncompressed digital audio streaming to maintain the original audio quality. A few of these protocols permit streaming to an infinite number of wireless amplifiers which is convenient for whole-house audio distribution.
Some of these protocols support low-latency audio transmission which assures that the audio of all speakers will be in sync in a multi-channel application. These wireless audio transmitters generally work at 2.4 GHz. There are also some devices such as Amphony’s line of wireless audio products which work at 5.8 GHz. Products that work at 5.8 GHz have less competition from other wireless devices than those utilizing the crowded 2.4 GHz frequency band.
Wireless amplifiers offer different levels of audio quality, output power and standby power. Wireless Class-D amplifiers usually have standby power of 5 Watts or less and a power efficiency of greater than 80% but sometimes high audio distortion. It is crucial to pick a wireless amplifier with low audio distortion. This will ensure good sound quality. High-quality amplifiers have audio distortion of 0.05% or less.
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