Really the terms mean little outside of a relative context - I don;t think it's at all dificult to understand any of the temrs relative to other speakers being discussed. Provided the person reading has an idea of what the person has listened to.

Using the left hemisphere of your brain ( the analytical side) to describe the experience of the right hemisphere of your brain is highly problematic. You are trying to put into words what it is you are hearing. Castle speakers I would describe as laid back or overly polite - both terms i use to mean they lack dynamics - so while nice on small ensemble or solo strings they don;t do much when you put on rock recordings - most all Panel speakers suffer a similar issue for me.

Warm I would assiociate to a speaker that sounds a bit bloomy in the bass(an overextended bass line that seems to drag ever so slightly). Again relative to another speaker where the bass note seems very quick to end before the next note - for speakers a bit of box resonance adds to a speaker's warmth. Some tube gear. On the other hand the more egregious SS grain which is easily heard when using quality speakers - is considerably displeasing and in just about every SS amp at ebvery price point - the best SS amps I've heard are 50-60 watts or less. But with certain speakers a 150 watt Bryston/Krell can work.

Prat is yet another attempt to put a criteria to what it is we're hearing - since all of the measurements that are currently available are so woefully lacking at indicating whether somehting sounds good then it's not wonder they try defining what they're hearing rather than deciphering graphs which make truly lousy speakers look goodon paper.

Frankly i would not buy into a lot of the terms - they're attempts to describe sound - but most are not really on the same page.

The theme is relativity. In fact so is the term High End, Hi-fi, mid fi low end etc. If all you've ever heard in your life is AM radio on a stock truck radio then that;s your baseline - you hear a Bose and suddenly the Bose is HIGH END. then you hear a B&W and the Bose suddenly becomes garbage and the B&W is high end - and so it goes. And even then not everyone will agree.