I still have a system with 6 Bozak woofers, 4 Bozak mids and 24 Bozak tweeters that will blow you out of the room. Imaging ? Nah --- not much. Bottom end? Definitely. Satisfaction quotient ? Truly enjoyable ! It provides a LOT of fun but not if you are a true "Audiophile". If you are, you will tear the system to shreds with "informed" opinions ! Relax ! If it sounds good ---- it IS good !Stereophile reviewed some fully restored Bozak Concert Grand B410s a little over 10 years year. They looked past modern audiophile concerns and were very favorable about these. An excerpt from the conclusion:
Conclusion
You read about speakers that perfectly image but have limited bass, or hyperdetailed speakers that, over time, fatigue the listener. But the Bozak Concert Grand does everything well while not excelling at any one sonic parameter. I believe this is its greatest strength. It is dynamic beyond belief, with gobs of musical detail and harmonic richness. A pair of them are magical in their ability to deliver space and ambience cues, but they image more like what you hear at a concert—not "pinpoint" imaging, but a more blended sound. And the speaker has extraordinary but not superfast bass. The Bozak Concert Grand is the most musically satisfying loudspeaker I’ve heard. It may be the best non-horn vintage speaker you can own.
However, no way would these Concert Grands fit on the OP's bookshelf space. But they are definitely "vintage" in its most favorable connotation.