I'm in the process of upgrading my gear with Audio Research products. I feel that the Oppo as it is stock will not be as revealing and detailed as the AR cd9 I heard. I was wondering if a tube mod to the Oppo would add any sonic benefit in those areas. Currently I can't swing a cd9 and the preamp/ amp purchase. Not to mention there is no SACD and DSD support with the CD9. So, I guess I will know better when the preamp/ amp update is done.
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