Bigger drivers = bigger soundstage

Agreed Duke, thank you for clarifying what I wrote.

In terms of size yes, but the question is WHY the larger driver sounds better. "Saturation" is the best term (for me to understand). The larger drivers are quicker to beam in comparison to their smaller counterpart. That part being a higher frequency driver.

EX: 3 way, front fire. TMB arrangement, rear port Box speaker

IF the XOs design accommodate the drivers, properly and the sensitivity of the drivers is CLOSE (very close <5%). The larger driver is gonna out gun the smaller drivers.. It is as simple as that.. This is from the Speaker box as a complete assembly.

I’m not accounting for a room in any way, only from the actual box and it’s components.

I’ve built speakers and learned, "pick your drivers well". What does that mean? Woofers are woofers.. They work well where the test well. Just because a manufacture claims a driver works from 20 hz to 600 hz
doesn’t make it work well within THEIR test parameters (they lie a LOT). It is ALWAYS dependent on the crossover points with the parameters of a PHYSICAL driver size. 6 - 12" drivers have limitations because of physical size, It doesn’t matter how far you move a cone beaming will occur because of physical size.

Upper and LOWER limits. Don't push 5" drivers to 20hz it's not gonna happen.. Don't push 12" drivers to 2500 hz it physically does not work well.

Today a LOT of the newer speaker drivers are pushed beyond what a physical driver of that size can do because of "BEAMING". Yet because of DEEP throw (HE) drivers, we see it all the time. That is where the dispersion effect falls short. I call it saturation depletion, exacerbated by poorly designed, and untreated room surfaces.

In other words, bigger is better if it’s designed correctly. Every step BACKWARDS, from that position in a simple box speaker, diminishes it’s ability to out perform is SMALLER brother (sister). Apples for apples.

That’s just my long winded BUT simple way of saying WHY..

Large two way speakers, don’t get me going....:-)

I can get all teckie if you want LOL

Regards

Driver size has nothing to do with anything though.

Driver size (physically) is the answer to the OP question. The manufacture, SEEMS to hold to the same principal, without knowing the OPs actual speakers...

The physical size of a typical cone / basket speaker is the only physical limitation of the actual driver... (materials may very) AGAIN 5" drivers don’t do 20 hz any more that 12" drivers do 2500 hz well. I don’t care how well it’s manufactured or wave guide added. They (12") are limited physically.. to lower frequencies, just like smaller drivers are limited to higher frequencies..

The exception is multi driver application.. lobing is an issue then..BUT by careful design (length of the array) in comparison to room height, and XO design ALL of that is just that, "designed into the speaker.". A bad design goes a long ways. Just like a good one does...

Correct driver and application ARE the way to better sound..from the "BOX" perspective only... Nothing else.. No rooms, equipment, cables, tweaks, bad hearing, good hearing, or a change of dippers, matter. ONLY the correct application of a given driver..

When I say correct, I mean I check if the driver lives up to the manufacture claims.. maybe 50% of the one I’ve tested do. Seas is one of the best cone drivers I’ve ever used, just a fact for me.. I wish I could afford their drivers in every build.. Just top notch..

Driver manufactures have been trying to design past it for years... It is just a physical fact... THUS.. Planars... Convex Domes, Rings, and Electro Stats...

I’m not just another pretty face, I’m actually kinda smart...ebm (self proclaimed of course). I know, I can build a better speaker enclosure than most of the older designs.. the newer CnC stuff.. Tough to hand craft some of the designs.. Really no need to . It is mostly window dressing anyway...

Aluminum, @Corian and exotics being the exception..$$$$$ I remember a single log (TREE) went for over 1.2 million just for the veneers. 30 years ago.. I though I spent money that day.. 8-900.00 dollars.. LOL I was just blown away.. For a church build of all things..

Regards

My speakers use a 12" driver, have 360 degree dispersion, a wall to wall soundstage, and can be tuned to any room large or small. They are special! Just saying.