I’ve never tried the Oppo direct but I find it very digital sounding (in a bad way) and that is through a VAC preamp. So, I don’t think any preamp is going to help. If you like the sound direct, stick with what you have.
I would suggest a better player or add an outboard dac that sounds better and reinsert your preamp. That said, it’s your ears not mine that count.
I would suggest a better player or add an outboard dac that sounds better and reinsert your preamp. That said, it’s your ears not mine that count.