美国优雅公司最顶级的全频单元, 具有超长的冲程(+/-10MM即20MM),超低的失真,专业音响网站评价(madisound.com):
This is perhaps the best 3" wide range speaker in the world.  This small speaker can go lower, and sound better doing it, than any other 3" we know of. Patented NRT magnet system.
(这可能是世界上最好的3寸全频单元,相对其他3寸单元,这个小喇叭有更低的失真和更好的声音.专利NRT径向磁场系统)

• speaker [´spi:kə]   n.演讲人；代言人   (初中英语单词)
• magnet [´mægnit]   n.磁体；磁石；磁铁   (英语四级单词)