Perplexed on how single driver speakers can cover such a large Hz range

My 2 cents:

- Most speakers under $2k have junk crossovers, resonant cabinets and mismatched drivers. You're losing a lot of detail in the midrange and you don't even know it. It's only clear after you listen to a decent pair of single driver speakers. 

- Most speakers with the exception of true "full-range" towers don't extend past 50Hz. So the whole "fullrange drivers can't do bass" argument is so ignorant to the fact that most speakers use midrange drivers for bass. Most speakers benefit from a sub. Nobody is going to convince me that Harbeth P3SR or KEF LS50 have deep bass. 

- If you live in a reasonably sized flat you're not going to push the volume to night club levels. My guests often complained that the music was too loud on my small single driver speakers. But the same could be said about a large Bluetooth speaker. How much volume do you need? 

These factors have convinced me to buy the Closer Acoustics OGY blind and I have no regrets. Just find me a better (new) speaker under $2k. The midrange, treble and imaging is step up from the KEF LS50 Meta. The bass is fast and punchy thanks to the transmission line. But don't expect deep full-bodied bass. You can get that from a subwoofer. 

I'm also surprised by the enthusiasm surrounding coaxial drivers which exhibit a lot of the same problems as single driver speakers: doppler effect, weaker bass due to smaller speaker excursion (the woofer cone acts as a horn, a moving horn is problematic). And on top of that, coaxial drivers have crossovers and the multiple drivers aren't moving at the same speed causing a time delay. 

@ronboco Yes, I am very much a budget-conscious consumer. I watch a lot of reviews and GR Research stood out to me. There was something appalling about seeing cheap crossover parts, drivers and flimsy cabinets on major brand speakers, some of which costed thousands. I was still rocking the Klipsch RP600M which I loathed since day 1 (They suck). So yeah, I figured that I’d look into single driver speakers with sturdy cabinets and no crossover to muck things up. At least most of the money will go into the drivers and the cabinet. 
 

I visited a shop in Paris which sells a bunch of single driver speakers (unbranded DIY kits) alongside Atohm and Davis Acoustics speakers. The speakers based on the Audax AM21 driver were brilliant. I gotta say that the Atohm and Davis Acoustics speakers sounded veiled next to the Audax AM21 which were just faster and more immersive. I didn’t get the AM21 since they were a bit too large for my tiny living room. 

Years later I experienced a few other speakers with multiple drivers and they were just great. I could happily live with the KEF LS60 but the price is eye-watering and they exhibit an overly “clean Hi-Fi” sound at times. At the very high end you get to have a larger sense of scale/depth/volume and way better bass. But I personally don’t feel like my single driver speakers are bested in the midrange/treble/detail categories. 
 

You could assume that my hearing isn’t great, and that wouldn’t be far fetched. So my end game setup is very attainable. I’d like to be the village idiot in that conversation, or the average person at the very least. 

@andrei_nz I hope you could listen to single driver speakers someday. Yes, string instruments (especially guitars) sound way better on single driver speakers. Vocals sound more clear and natural too. This sealed the deal for me as I listen to a a lot of folk/country music.