自以为发现新大陆之前最好先google调查一下
比如说这篇讨论450h无法选配ML音响的文章
https://bit.ly/34kNAOC
里面有提到ML 17支喇叭和10支喇叭的分布
只有ML才会在后门有双喇叭，否则后门的配置为上方一个5.5cm喇叭，下方一个导管出口
(双圆圈表示那里有两个)，这样一组算1个喇叭，总数10个也没骗人。
而且这个5.5cm喇叭配导管的东西喔 是Pioneer引以为傲的技术
Pioneer还特别发新闻稿宣传，新NX用了自家的高端科技:
https://jpn.pioneer/ja/corp/news/press/index/2638/rel=__2
看不懂日文来看英文，Pioneer是怎么解释这个喇叭+导管的
https://bit.ly/34pZF50
Based on an acoustic analysis in the vehicle interior, the rear door is
equipped with a highly efficient bass reflex loudspeaker, which has a
mid-high-frequency loudspeaker at the top of the door and a channel that
optimally arranges the low-frequency exit at the door, for the first time in
Lexus under the door. This structure enables a low frequency reproduction
equivalent to a 16 cm wide range speaker and a high frequency reproduction
higher than that of the same full range speaker although it is a 5.5 cm small
diameter speaker and is a wider band reproduction realized with a
loudspeaker. In addition, the mid-high range reproduced from the upper part
of the door realizes a sound image and stage feeling in a high position, and
at the same time, the low range reproduced from the lower part of the door
realizes rich bass.
简单地说 Pioneer认为这样做低音相当于16cm的喇叭而且高音表现更好。