自以為發現新大陸之前最好先google調查一下
比如說這篇討論450h無法選配ML音響的文章
https://bit.ly/34kNAOC
裡面有提到ML 17支喇叭和10支喇叭的分布
https://imgur.com/gallery/0Tw0NzS
只有ML才會在後門有雙喇叭，否則後門的配置為上方一個5.5cm喇叭，下方一個導管出口
(雙圓圈表示那裡有兩個)，這樣一組算1個喇叭，總數10個也沒騙人。
而且這個5.5cm喇叭配導管的東西喔 是Pioneer引以為傲的技術
Pioneer還特別發新聞稿宣傳，新NX用了自家的高端科技:
https://jpn.pioneer/ja/corp/news/press/index/2638/rel=__2
看不懂日文來看英文，Pioneer是怎麼解釋這個喇叭+導管的
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.
簡單地說 Pioneer認為這樣做低音相當於16cm的喇叭而且高音表現更好。