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External HD Changing the quality of the sound?

Hi everyone! It's my first thread i start in this community and i'm willing to go far in the journey of Hi-Fi audio :)
So i was wondering, is it real that if you put your audio file in an external hd it lower the quality on the outline?
I still don't have dac to test it so i wanted to be sure before putting my library in it, since my external hd is a 2tb and the one i have in my imac is a 500gb and is full...
Also, is it true that the type of connection used for my hd is changing the quality (usb 2.0, usb 3.0, firewire800)?
I know how it could affect it, i just want to know if it is all true?
freb03

Showing 1 response by audioengr

audioengr
3,282 posts
 
Adding an external HDD or RAID does one thing for sure: it adds yet another ground-loop to the system. This alone can cause SQ degradation if you are not careful. The power cords should be heavy and use the same outlet as the computer. Adding in power conditioners can help or hurt here depending in their design.

I have a Firewire RAID attached to my Mac Mini and it has no audible effect. Cheap firewire cable.

Steve N.
Empirical Audio
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