Here are some that I got from this
website. Very helpful.
1. Warmth: A listening term. The opposite of cool or cold. In terms of frequency, generally considered the range from approx. 150Hz-400Hz. A system with the "proper" warmth will sound natural within this range.
2. Bright: Listening term. Usually refers to too much upper frequency energy.
3. I don't know, I haven't ever really seen that term used here.
4. Transparency: Listening term. An analog that can be best "pictured" in photography. The more "transparent" the sound, the clearer the auditory picture. (I am pretty sure this is what you are talking about by "thin")
5. Leaking sound??? Others can hear the music you are playing on your headphones.
6. I honestly don't know that one myself.
7. Balanced: Referring to wiring: Audio signals require two wires. In an unbalanced line the shield is one of those wires. In a balanced line, there are two wires plus the shield. For the system to be balanced requires balanced electronics and usually employs XLR connectors. Balanced lines are less apt to pick up external noise. This is usually not a factor in home audio, but is a factor in professional audio requiring hundreds or even thousands of feet of cabling. Many higher quality home audio cables terminated with RCA jacks are balanced designs using two conductors and a shield instead of one conductor plus shield.
8. Just what it sounds like, you can here all parts of the music. (ie. you can hear all the instruments)