what does "too dark" mean


when you describe a preamp as being too dark what does this refer to?
dpm2340
Think of a portrait photo~on a dark portrait,details you know exsist,fine lines,uneven textures,lashes/brows blended would only just be visible in the most illuminated areas(foward points)outlines/edges less defined,full shape obscurred,background fading to inky black.Seems dark would lack stark detail,less 3 dimensional appearance,yet depth could remain in a raised relief,like a dessert sand dunes after sunset.Mind that this is just a guess based on what "dark" means to me concerning an image/picture.
I agree with Red2 and Mechans. They hit it on the head. Closed-in, overdamped, air truncated, ringing or vibration damped down. Not my kind of sound...sort of dead....
>Or more commonly as Drubin put it, rolled off highs.

Actually, I argued against that as a hard and fast rule. I think you can have extended highs and still have a dark system. My personal vocabulary, YMMV.