compact tube amp and in wall speaker

Yes, looking at ML electromotion in walls that have ribbon, but I am not married to them. The speakers will be built into the bookshelf with their own wood enclosure matching the shelving. I would also consider a compact bookshelf speaker but my max height is 11 inches and max depth 13 inches icluding cabling. I am taking into consideration the subwoofer comment and could add that on the lowest shelf if it is small enough, but my concern is not enough power to drive the main speakers with a tube amp and also limited height and depth. I expect a subwoofer would have its own amplifier. I may have to give up on something, maybe the tube if I want good sound volume. I was considering the Jolida from a size standpoint (and tube look). If I get a efficient in wall or bookshelf, will 10 tube watts drive high 80's low -90 dB speakers?

@Atmasphere, thanks for the suggestion on the Lowthers. They look like an interesting project and I understand what you are suggesting, but they seem outside my price range, but I also understand they may compensate for a costlier amp. Have you built enclosures for them yourself?

"The speakers will be built into the bookshelf with their own wood enclosure matching the shelving. I would also consider a compact bookshelf speaker but my max height is 11 inches and max depth 13 inches icluding cabling."

You need to do some experimenting. Putting a bookshelf speaker in a bookshelf will have a huge impact on how it sounds. I know that sounds silly, but the vast majority of bookshelf speakers were never meant to be put in a bookshelf. Maybe get a cheap pair of Pioneer or Polk from Best Buy just to see what you're getting into. You can always return them, or trade up to the ML in walls you first mentioned.

@Zd542: yes, the more I get into this design, I realize compromises of what is a lifestyle type situation where I'm trying to get much better quality.I though maybe someone may have dealt with similar situations. Again appreciate the feedback as it helps sort the issues.

Audiouny, I would really opt against installing in-wall speakers in a bookshelf. They were not designed to be installed that way and will sound awful. Also, the money spent having a carpenter build them in will be better spent on better bookshelf speakers.
Go look at nice little bookshelf speakers that are either front ported or not ported. Rear ported will never work. For an amp, look at a tube hybrid like a peachtree.