What Hi-Fi Russia have published their review of LUMIN S1 in PDF form
During the review they state:
Listen to 'Motets' Bach performed by RIAS-Kammerchor - and you'll hear everything we admired in A1, only more superlatives."
Furthermore, as is the case with the younger model, S1 does not force you to revise your collection in favour of high-resolution.
The Hong Kong company has surprised us all by creating a role model for other High End network player manufacturers