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

@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

    x2 eric,
      It's always a preference thing.I have had and was a maggie salesman i had smg 1,2.3a 3c 1,6qr .Biamped ,cj krell,tandbreg,luxman etc all i mean all benefited from a sub or two.I had 3c biamped tube top cj with two sunfires 8" in a treated room it was killer.If i put ac/dc on well not so much again nothing beat my ole' cerwin vegas with 12" pushed with my bridged crown 300s for that when i tryed to break windows as a younger man.My love for smaller drivers came with the ads i had two 8" then DCM (transmission design,highly underated spkr)proac 2c man i loved them with quicksilvers and  subs too...(almost always sunfires )
      That being said the newer trend toward single driver speakers intrigues me.I am very interested to hear the emerald physics with there 12" the big zu are great too.
 Again just me but all being eqaul in a great room smaller usually means more acurate thats why planers kick ass but need to be reinforced down low. 
 Until you break out the A.E black card then all bets are off.Unforntunatley my A.E card would be black only if i spray painted it.  ;-)

Yeah, not too many have that card but still quite a number.
Don't remember his name, there is a French designer who makes great drivers used in some esoteric speakers. That driver goes down to about 40hz and up as far as you can see or hear. I think, it's 10" driver but not sure. The quality of that driver really impressed many people. I even watched an interview with him. Basically, he is a one man operation. Old world craftsmanship.