Fritz Speakers

I've never read anything negative about Fritz speakers.

I have listened extensively to both the Carrera and the Carbon 7 mk II and they're both lovely speakers. I cannot recall about the "low listening" element.

However, your question raises another one for me, namely,

"Don't speakers perform differently at low levels depending on the amplifier driving them?"

If the answer to that question is "yes" than without knowing which amplifiers people are using to drive the Fritz, I'm not sure you're collecting useful information.

I have the Fritz Carrera BE speakers.  They are the best low volume speaker I have owned.  I can't imagine ever selling these speakers...they are just that good. 

I would advise inquiring about a Xover upgrade I owned 2 pair ,and the drivers 

are excellent ,Xover is done good but so much better with top quality parts 

instead of $2 resistors, ask for Path audio ,they are $30 each but I believe only 2 resistors ,and for capacitors the VH audio Odam capacitors , check them out 

it will add maybe $6-700 more but worth every penny . 
This applies to most any brand  speaker under $15,000 they always skimp on the quality I have modded speakers mainly for friends and family for over 20 years your Sonic purity and details are improved for sure , ask about the option.

rule of thumb when a company will not show or describe the Xover or say proprietary it’s BS .you just want to know the brand name of the parts ,and all these parts would fit , go to VH audio and check and look up Path audio resistors , parts connecxion carry the resistors , and for speaker terminals don’t settle for cheap brass connectors , the WBT next gen speaker terminals are only $40 each , essential for best sonics they are gold  over Copper.

I have the Fritz Rev 7 SE and they sound excellent at low volume.  I usually listen at 40-70 db depending on the hour of the day.  They disappear regardless of volume and have outstanding soundstage and imaging as well.  They are a bit laid back, at least in my system, but I like that as I can listen without fatigue for hours.  I listen to a wide range of musical styles and genres and they work well with all of them.   I am running them with an MA8900 and Denafrips Pontus II.  Wonderful speakers, smooth and very well balanced.