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Laptop/battery/USB/toslink/jitter


atomheart
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Hey neighbo(u)rs-

 

Here are jitter measurements from three reviews that can provide a little insight into how a battery-powered source (i.e., laptop) can help fight the war on jitter...

 

Scroll down to the jitter measurements of each page.

 

http://stereophile.com/digitalprocessors/cambridge_audio_azur_dacmagic_da_converter/index3.html

 

http://stereophile.com/digitalprocessors/wavelength_cosecant_v3_usb_digitalanalog_converter/index5.html

 

http://stereophile.com/digitalprocessors/ayre_acoustics_qb-9_usb_dac/index6.html

 

Switch-mode power supplies, typical of most for laptops, are the worst culprit; but even 120 hz (and/or other 60 hz multiples) can creep into jitter as well using non-SMPSs, unless carefully designed.

 

I use these...

http://www.radioshack.com/product/index.jsp?productId=2103979

...when having to listen to the laptop in non-battery-powered mode.

 

Chris

 

AC conditioning: 2x Cinepro Powerpro10 balanced power transformers[br]Source > MonarchyDIP2496 > TacT2.2x(w/mods) > LavryDA11 > Bryston4B-ST > GradientHelsinki1.5[br]Sources: MBP3,1/10.5.8(w/160gbSSD,6gbRAM) - iMac9,1/10.6.2(w/8gbRAM) - RokuHD - LGbh200[br]S/W: Playback- Amarra-mini, Pure Music; Ripping- XLD

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