Why "bookshelf" sspeakers?

Bookshelf speakers is a term that was used 50 years ago. Many large speakers of that era including JBL , Advent, KLH, ADS, AR, etc. used that label for any speaker that could be placed on a shelf. Your 5Ts are called stand mount not bookshelf speakers.  Using the word bookshelf speaker a misnomer!

The term bookshelf speaker is now an anachronism in a hi-fi context. Even back in the day there were plenty of "bookshelf" speakers that were never designed to be used close to a wall  -e.g. LS 3/5a's etc.

Because of place...

Small room now...

But i need one with a porthole because when they are modified they sound nearer to bigger speakers ... So much i dont need subs...

The soundscape encompass my listening position with imaging more than good and a soundstage outside of the speakers plane encompassing my listening position ...

So much even it it is not as good as in my past listening dedicated room with big speakers i dont miss them too much ...I appreciate their qualities and anyway my circonstances had changed and i enjoy headphone at their top level also in my listening post ...

Better to have headphone and speakers than just one choice...For sure bigger speakers in an acoustic room will beat all headphones ... But my K340 are not far from top speakers even for bass...

I will never own a bigger room after 72 years old ...I must had decrease my house size...

It is better to own small bookshelves acoustically optimized than big speakers not optimized... I say it by experience ...Then it is not so much about the size as about how you use them ...

For sure they differ optimized or not but small optimized one may be  way better than many big speakers right out of the box...Choose them well ...

"Bookshelves" were a compromise at one time. They were cheaper and easier to position for people living in small spaces, easier to move, and were compared to standard speakers themselves which were wide baffle boxes with either three-way or hybrid horn designs. College students could afford a pair of Bose 301s, but big JBLs, Klipschorns or Cornwalls were out of the question. Bookshelf speakers were compared to "monitors" which were understood at that time as meant for professional installations  and had industrial finishes. "Tower" speaker designs did not really come into common popularity until the late1980s with high-end companies like Boothroyd Stuart Meridian. The design leaders of the time included Bang & Olufsen whose small cabinet models combined fine design and materials with excellent sound. Popularity of sat-sub arrangements came even later once passive subwoofers were replaced by reliable and affordable powered subs that were available. So "bookshelves" weren't really displacing tower speakers or floorstanders as they are known now.

Lower cost at the expense of dynamics. Monitors/book shelves are not for me. I value big dynamics above all things in audio. Dynamics is what make music sound real.