Tube stage for CD player?


I have a Harmon Kardon CD player that is o.k. but the sound I get from vinyl is so much better. Is there a tube device that I can insert between the CD player and the pre-amp? I have a 12ax7 triode pre-amp with a Son of Ampzilla power amp. The CD player puts out a 2v signal and that's what I want from the Tube based link. I would just like to run the CD signal through another set of tubes. My phono stage uses 12ax7's. Is there something simple out there? Thanks.
jw94055
Go with a Jolida JD-100. The tube is just after the dac and it does not contaminate the signal with op-amps and other active devices. Sound is sweet, dynamic and very palpable.
Tube Buffer http://www.space-tech-lab.com/BufferPage.html
Great products and service
E mail me if you have more questions
second the musical fidelity x-10d and upgrade the tubes to sovtek e88cc . worlds better than the standard philips 6922