全频扬声器
**Explanation of changes:**
- Removed "段" (segment/range) from "全频段" to produce the more standard and concise professional Chinese term "全频扬声器" (full-range loudspeaker).
- "全频" is the established formal term in professional audio Chinese, appearing in technical documentation and product specifications across the industry.
- This maintains appropriate B2B register while improving brevity and technical accuracy.
