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In Reply to: Re: DIY CD Transport posted by Adam Reed on January 14, 2003 at 12:23:02:
Wonderful!!!CD-ROM usually comes with 4X, 10X etc...how are these spec comes into the selection criteria? the lower the better or the faster the better? how about DVD drive?
PC CD-ROM used 4-prong molex providing +12V and -5V(?). Do the CD-ROM used both rails or either one? AT power supply may be too noisy for audio purpose...
In general is the quality of PC CD-ROM superior or inferior when compared with the drive inside a CD player? I suspect computer grade is a bit more demanding than audio grade...
Follow Ups:
The CD-Rom needs both 5V and 12V. The case of the 52X says the requirement is 1.6A for each but if I remember right it's more like 1.2A at 5V and 200mA for the 12V.Doesn't an audio run at 1x no matter what the max rating of the drive?
And BTW: the Creative 52X is very quiet.
cheers
Adam
It's going to be the external DAC and the clock it references that determines the sound quality. My impression, perhasps false is that CD-ROM units are sometimes a bit noisy mechanically so you may want to watch for that. If I were doing this I would build my own regulated audiophile type power supply. The switching supplies that are used with PC's are switching supplies and noted for putting out RF.
Yeh...ARAIK...lower speed CD-ROM's are less noisy...IIRC the clock a DAC refers to is inside the CD-ROM?
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