HD-Players sound best, when fed with high resolution music files. Here you’ll find some proven sites for downloading high resolution music:
2L Download portal of the audiophile Labels 2L
eClassical Provider of a purely classical program across major and minor labels
Hd-Klassik Pure classical program of smaller labels with an audiophile focus
Hd-Tracks German site of America's largest provider with a large cross-selection of all genres and labels
HighResAudio Top- German provider with a large cross-selection of all genres and labels
Linn The audiophile music label Linn offers its own productions for download
Onkyo Music Japanese provider with a reasonable cross-selection of all genres and labels
Pristine Classical Remastering experts, offering purely classical recordings mostly from the mono and 78-era; some absolute treasures
ProStudioMasters American provider with a focus on studio master files
Qobuz Largest French provider with a large cross-selection of all genres and labels