We should reject hard-to-drive speakers more often

To reject hard to drive speakers would be to reject many a great sounding speaker. Some speakers that appear hard to drive from a quick glance at basic specs, turns out they are easier to drive than first thought. All depends on where the dips in impedance exist, among other parameters/measurements take the JBL 4309’s for instance....they look to be a difficult load @ 4 ohms and 87 db...however , in real world listening conditions, they are seemingly a pretty easy speaker to drive, based on most positive reviews I’ve read about them.

Pretty much any speaker will PLAY with lower power, but also most good speakers, even "efficient" ones, will sound better with more power (this has nothing to do with the accuracy of the reproduction chain, of course; "loud" does not mean "accurate", obviously.. 

Anyway, Maggies will play OK with low power, but if you want the MOST out of them, more is better,and there is no thing such as "too much" unless you have an amp that misbehaves.  I would guess that is true with any "inefficient" speaker.

Match your hardware to your speakers.  Low "watt" tube amps/integrated will drive your "efficient" speakers nicely, I am sure.  ARC makes a couple, as do others, I am sure.

Cheers!

I’ve generally been keen on having speakers that are higher sensitivity.

Recently, I built a pair of Seas coax speakers. 4 ohm, 80dB efficient. 
Driving them with a 30w class A amp wit( a large power supply 

Not where my sonic interests are - or so I thought.

These things sound amazing! 
 

Don’t get me wrong. I very much want to build a 15” 100dB coax set up in a coffin sized box, drive them with a SET. But, that’s not an option at the moment. And these low sensitivity speakers have shown me just how good inefficient speakers can sound when powered accordingly.

Im less reluctant to consider difficult speakers after listening to these for the past several months.

@bdp24 is spot on!

There are plenty of people enjoying their "hard to drive" speakers likely with no idea they’re hard to drive. They somehow managed to buy an amp that works (i.e. just about any decent amp)...for shame! Don’t they sit through endless egomaniac John DeVore youtube videos? (and maybe pay through the nose for a plywood box with 2 drivers because, hey man, it's 10 ohms) Or read every tedious tech review attached to Stereophile reviews? You mean they just sit there and enjoy music and have NO IDEA their speakers are horribly flawed? Wow man...what a shame...