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Where do you place the sub? In the bottom of the trunk? Because my audio installer says that the trunk is "sealed" and the sub will not work... And he doesn't want to install the sub in that way. He says that only a sub like this, placed under the passenger seat, will work:
Is it right?
My IS has stock audio and no sub...
You should think twice about that IMO. The trunk being sealed is what gives a sub that kick in the back of the head feeling. If you put it under the seat it would be a totally different kind of sound, like a pick-up truck (their only option). The whole car would vibrate with the sub and that may be your preference, I like having the punch when a kick drum is hit or the bass is hit hard.
I like having the punch when a kick drum is hit or the bass is hit hard.
Me too!
But I don't like when people outside of the car can hear a lot of that sound...
A good way could be to install the sub in the original position of ML. What is the size of that sub?
You should think twice about that IMO. The trunk being sealed is what gives a sub that kick in the back of the head feeling. If you put it under the seat it would be a totally different kind of sound, like a pick-up truck (their only option). The whole car would vibrate with the sub and that may be your preference, I like having the punch when a kick drum is hit or the bass is hit hard.
Subs in the trunk are horrible. I sound comes through the rear seats, which colors it badly. If you do this, I recommend a very low cross-over frequency, like 75 Hz.