Your initial impression will be "why do these sound normal? There's nothing special about these speakers... They are so expensive".. But just hold on and keep listening...as you go through your music you start noticing details that hadn't noticed before... The tracks will show every defect they have. The vocals will be crystal clear. I have monitoring headphones (ATH M50x) and these speakers are on par with the headphones when it comes to mid range and treble. However the bass is subdued (which is a good thing). If you want thump in your music you need sub woofer. These are not for you. If you want to do casual listening, these are not for you.
However if you mix tracks and know exactly what you are listening to and want to modify your tracks...these are the speakers for you.
Connectivity: Each speaker unit has its own power so you'll need 2 extra wall outlets. You'll need external soundcard or audio interface (for example Focusrite Scarlett 2i2). You'll need 2 TRS to TRS cables (one for each channel) or 2 TRS to XLR cables for connecting speakers to the audio interface.
You'll laptop/desktop internal sound card and the 3.5mm jack won't power these speakers.
In addition you'd probably need isolation pads and might want to sound proof your studio for best results.
If all this sounds like too much work, you probably don't need these speakers.
Sound quality: In terms of sound quality, these are a tad better in showing the mid range and treble frequencies than ATH M50x. However M50x has brilliant tight bass. And such bass can only be achieved by sub woofers (Yamaha HS8S). I got these for 27.8k from local dealer in my city. Please check prices offline before you purchase pro audio equipment online because pro equipment is usually sold through dealer channels and we might get wholesale prices offline.
Expected performance level. Good even sound across the frequency range. I guess it uses the LM 3886 audio amplifier chip which is rated very well. As monitors go, despite the premium we pay in India, it is sound value.