Do we really need anything more than 8" woofer and 1" tweeter for medium size room?

We never did discuss Transmission Line enclosures either, or dual woofer scenarios.

Dual woofer's aren't quite as good as more diameter inches, but they don't hurt. :)

Eric i beg to differ ... I have adagios two 6.5 underhung transmission line . They share different frequency i have had probly 40 pairs if spkrs in 30+ yrs . There killer and go to 30 hz ribbon tweeters 2way 

@oleschool

Not sure what you are differing to. ;)

I was making two different statements.  One, noting that we didn't really discuss transmission lines yet as another way to get more out of smaller drivers.

All things being equal, 2 drivers does not double the bass though. :)

Best,

Erik

     What i was getting at is i believe two smaller drivers are more accurate then one massive 12"  imo. I believe my spkrs produce great bass ,placement is big but better then some 10" ive had .. Moving massive air no .But transmission designs works well  my ole dcm time frame 2000ripped they were small multi driver transmission lines too . Jmho if low end is lacking  40hz down let the sub do that hard and specific work 
respect..

@oleschool is right, but I think the issue isn’t small vs. large, it’s more about bass limiting.

I can set up 15" subs with any planar speaker and make them sound lightning fast. They will have measurably deeper bass, lower distortion and less compression than small driver alternatives.  However, "proper setup" is a really gigantic pain in the ass. It's like the mythical girl next door. Often read about, rarely dated.

Speakers with multiple small woofers (which I like) tend to have more dynamic range, but also, less deep bass (i.e. higher -3dB or -10dB points). That keeps them out of trouble where larger speakers would require much more effort to make sound as good.

So, goes back to my own reasons for being in the small woofers are beautiful camp. Nothing wrong with giant subs, it’s the setups that tend to fail.

Erik