Vimberg Speakers

I have always wondered why some speaker manufacturers design their speakers as 4 ohm rather than 8 ohm speakers.  Since 4 ohm require about double the current this limits the kind of amplifier you need to drive them and I would imagine a 4 ohm is less efficient and perhaps they tend to generate more distortion.  Kind of like driving a 600 horsepower car at 65 mph vs driving a 300 horsepower car at the same speed.  Is there an advantage for designing a 4 ohm speaker knowing this.  I wonder if then a 4 ohm speaker provides a more dynamic response.  An 8 ohm speaker would I would think require turning up the volume much less than using 4 ohm speakers.  This also said, I wonder why amplifier and receiver manufacturers do not talk more about current/amperage verses watts when current is actually the most important specification.  Amplifier manufacturers usually try to hide the specifications for amperage numbers because the numbers are lower than watts.  Hope you do not feel this to be a stupid question.  This certainly gives away my being a beginner compared to knowledge and experience this group has.  This said, I have been amazed by the knowledge this group has.  I have also been amazed by the willingness to teach and share their knowledge.

@willmacc, it's always hard to listen to evaluate a system as something so simple as speaker cable or the room itself can totally ruin the experience, so if you don't have previous experience with the components or the place, you don't know what you're listening to...
Thanks for your suggestion for the Falcon, I will see if I can hear them somewhere but from my experience, I have never been keen on ribbon tweeters.
@larry5729, they do list their specifications on their page
https://vimberg.de/mino/
They sell for about 26K euros in Europe for the ceramic tweeter and basic finish. Add 2k for piano lacquer and I think about 8k for Diamond tweeter.
Concerning your question, I don't find it stupid since I am wondering the same thing. I think in HIFI, it's always a matter of compromises. They probably do this to achieve something else on another level.
@audiotroy 
So for you, a good setup would be lumin x1 - T+A PA 3100 - Vimberg Mino? When will you receive the Amea?
Would you recommend something else with similar spirit?

Agree with you Steph. Only heard these once, wd like.to hear again in another system.  I have the same midrange drivers as the Mino in a set of speakers at home and can only say they def need a warm side of neutral set up. Currently use a tube pre w class D power, which works pretty well.

@soix
I actually did write to Jeff Fritz, thanks for the advice.
For those interested he published my mail as well as his response

https://www.soundstageultra.com/index.php/feedback

If you guys like the sound of Accuton drivers, another company that uses these is Estelon.  I heard these some years back at the So Cal Audio show and was mightily impressed.  I think it was the model XB on demo.  But the XA and models up the line have gotten rave reviews.