I just experienced exactly that. My speakers are 12" 3 way. I've been looking for a smaller speaker that can best them, and have come up empty.
Most recently, I auditioned a pair of ATC SCM20P. Having heard the 50s and being told that all ATC speakers share the same sound, I had great expectations. And they are great sounding speakers but just don't have the scale of sound I'm used to.
Since my existing speakers are JBL, I also auditioned a pair of 4309s, the 6.5 inch version of the 4349 which is a great speaker. And they too, are great sounding speakers overall but just sound small.
The ATC SCM50s only have 9 inch woofers but sound as large as mine so maybe there's just a threshold of size for that big sound. The wavefront a larger woofer puts out is recognized by our hearing as representing a bigger scale of sound.