Vintage vs Modern speakers.

Altec A7 does sound much better than i expected.

I picked it up only three weeks ago.

It give effortless dynamics and nuanced bass with wide and deep soundstage.

Although Altec does not sound boxy, I could notice more holographic imaging through my modern speaker Lansche 4.1 which I had been using since 2006.

I am happy to have both.

I will play each depending on music and my mood.
Altec seems to work better with Jazz and rock music although it is not slouch with Classical music.

I think Altec A7 sounds more like live music.

The holographic imaging through Lansche 4.1 may be exaggerated effect which can not be heard at live concert.

But audiophiles tend to enjoy such holographic imaging.

I am happy to have both.

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I morphed both low sens and high sens together, Best of both worlds , separate cabinets  but one   cohesive meshed soundstage.
Best of both designs. 
Could I be happy with only 1 single WBer,
Sure i could,
 Could  I be happy with a  single low sens speaker?
No never again.
 I could not, will not.
But both together, provided the low sens midwoofer is very well behaved. 
This is the caveat, the lone condition. 

Lansche 4.1 is also high efficiency speaker (99db/w spec but real no is around 94db) which can be drive by low power tube SET amp

Thus I am driving two speakers with tube amplifiers.

But they sound slightly different.

Altec with 99db/w efficiency give no strain even if I raise the volume to ear aching level.

What I hear in both speakers is called
Resonances
Most folks , as yourself, have absoluetly no issues with resonances.
All speakers have soem degree of resonances. 
Some more, others less. I tend towards the very lowest possible resonances throughout the entire midrange say 200hz-5khz-6khz.
This is where my ears perk up intensive and alert to this mid zone. 
Place you speakers in a  smaller room and then you will be able to more detect  these  resonances = aka The Nasties.

As i say, most audiophiles fall in love with a certain speaker and have no issues with the resonances, they somehwo block these nasties out or just accept the good with the bad. Or they have not heard a spaeker with very low resonances thus have no reference point to compare.
I have past reference speakers thus I know what  designates acceptable level of resonances and what should be a  reject. 
Few speakers qualify for my acceptable level of resonances.

My speaker system still in development has shown extremely low level of resonances and I have futher developments to work out over the comming 6 months. 
It will  be the finest speaker on the planet, within the parimeters of this size and design and in most categories of critque.
If we give points to each quality ina  speakers voice, I think my design will come out top dawg.
Your 2 speakers have more SPL,  and so, you get high points there.
Mine will offer slightly less SPL but will have superior midrange etc etc.
All due to  thanks to recent developements  in WBer  designs. 
No I could not come around to either of your speakers. 

https://www.css-audio.com/single-post/2019/09/04/understanding-distortion