Are you ripping with Exact Audio Copy using the bit-perfect secure options?
http://blowfish.be/eac/Setup/setup1.html
I've accidentally made rips without using these settings, and I always know when that happens because they sound terrible. If you don't have bit-perfect rips, that could easily explain why your transport sounds better than your USB input.
http://blowfish.be/eac/Setup/setup1.html
I've accidentally made rips without using these settings, and I always know when that happens because they sound terrible. If you don't have bit-perfect rips, that could easily explain why your transport sounds better than your USB input.