Balanced/Neutral
Venture Electronics Monk Plus
- Transparent Smoke
Yincrow X6
- Black
- Blue
7 Hertz Acoustics Salnotes Zero
- Black
- Celeste
- White
- Mecha
- Orange
Knowledge Zenith ED3M
- Blue
- Red
A sound signature which is balanced/neutral/even across the frequency range, can also say that no frequency range covers/overlaps the other frequency range.