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

Hi Inna,  In general,  not absolutes... 8 inch woofers that go down well, don't go out well in the midrange. That's why you see so many 5 or 6 inch 2 ways, the smaller drivers go out in the midrange better. Again no absolutes,  I have certainly seen very good 8 inch 2 ways.... so now bass... anyway you look at it,  larger drivers move more air and increase the impact.  so yes, in my opinion, in general, an 8 inch 2 way is fine for a small to medium room and also yes,  a couple of 10's would do it.... If they go down well.

I have very nice 6" woofers in mine, sub is for movies only.

The trick isn't the electronics, it's the room acoustics. A lot of people try to get more bass with bigger speakers, and it sounds terrible.

A well designed 6 or 8" woofer in a good enclosure, with proper room acoustic treatment is a real marvel not enough get to hear.

Best,

Erik

My monitors have a 7" mated to a 1" and I have all the bass I need. It helps that my room is about 10’ X 15’ so I get very usable bass down to the mid 30Hzs. It’s only down 4-6 dbs by then so I can clearly hear and feel it. Just ask my neighbors. :-)

All the best,
Nonoise

Hi Tim. I would think that 8" driver is overall a good compromise. 7" is not enough for bass and 10" won't do for midrange. The unattainable ideal is one driver, right? Well, big electrostatics, but that's different, we are talking about dynamic speakers.

Erik, let's assume that room acoustics and wall current are done right.
I would say that my 8"/1" with 120 watts/ch Redgum integrated amp go down to low 30s in a pretty good fashion. Vifa drivers. But that's still only $1.5k speakers with $1.7k integrated. I can imagine that the same speakers would do much better in every respect with, say, class A Gryphon or older Rowland or Lamm hybrid, and many others. Not to mention better speakers with better drivers.