I have the VK-3i with built-in phono stage. John_1 is on the money. Pop the top off the case and you'll find the phono stage card located toward the back of the unit. The card sits up vertically and indeed has a slider switch for the MM/MC settings. If you want a picture of the card, you can find it at this link http://www.balanced.com/products/phono/. This pic is tiny but could help you. Write me at [email protected] if you have add'l questions. Good luck!