The box below will accept an MM phono cartridge level input directly -OR- a line level signal from your existing phono preamp. In the latter case you will need a 3.5mm to stereo RCA adapter cable.
Pro-ject Optical Box E will take line level input (from your phono preamp output), or it will take a MM cartridge level input directly. The product page is linked below. There is a link on the product page for the Owner's Manual which describes the technical details. The box has user selectable 48-KHz or 96-KHz output over Optical.
If needed you can find dozens of these 3.5mm to
stereo RCA adapter cables on Amazon.
P.S. If you're planning to digitize vinyl LP's to a computer there's an entirely different solution I can post.
