You'll of course need a phono amp. You didn't say what Wadia unit you have, nor is your system posted. But if your Wadia has digital inputs, I'd recommend a high quality analog-to-digital converter (like the Wadia 150) to receive the output of your phono amp and you'll be all set; and without the need for either a Bolder ($$ ;--) preamp, or a more expensive (and probably noisier) phono amp with volume controls.
Phono preamp directly into amp?
It's been a quite a few years since I've owned a preamp. I've been running my Wadia through balanced cables directly into my Boulder 1060 and would like to play some vinyl again. Do I really need a preamp or is there a phono preamp(mm&mc) with a volume control that has balanced(XLR) outputs that I can run directly into my amp?