My first "true" HiFi speaker project was something I made while in Jr-high in the 60's. Culled from the pages of Popular Electronics, it was called the Cinderella (above pic). A simple speaker project, it used a single small inexpensive woofer and tweeter. It was a good (cheap) way to get closer to the sound of the more popular (and expensive) commercial systems like AR (Acoustic Research) at the time. It introduced me to some basic concepts of speaker design: driver mass, volume, and resonance. And it got me interested in making bigger and better projects in the future.
I replaced the original woofers with the black-coned units (above) years later, after accidentally blowing out the original woofers (oops!). The original drivers can be seen at left on the twins. The original tweeters were also replaced with a paper cone tweeter.
A few months after making the original speakers I made a new version that had 2 woofers and 2 tweeters... the "Cinderella Twin." (left). It used the same speaker, except doubled up for smoother & (slightly) greater dissipation. It also had a slightly larger cabinet. (both are sealed). Both Cinderella projects use a simple 1'st order crossover.
Both large & small cabinets here were made from pine and covered with contact paper. Pine is NOT a good choice for speaker cabinets because it (too easily) expands & contracts with climate. But remember this was my first project and I used what I had available. The grilles were cut-out panel board covered with grille cloth (original Cinderella), and 3-D foam for the Cinderella Twins. They don't look that bad, even today. (not bad for a young punk kid).
I still use these cabinets today, mostly for listening to spoken word on both AM & FM radio broadcasts. They have a very smooth mid-range... none of the deep (un-natural boomy) vocal sound you typically get from FM on most "hi-fi" speakers. I can listen to these speakers all day without tiring of the sound. They are natural sounding and not at all fatiguing. They also don't have the exaggerated sizzle in the tweeters that many other such speakers of this size have. Not bad at all, considering these are such inexpensive (and old) basic speakers.