Two Main Types of Car Stereo
Image source: www.car-audio-uk.blogspot.com
There are two main types in the stereo universe namely Sound Quality and Sound Pressure Level.
Sound Quality refers to just that — a very linear response that’s not boomed and is very controlled, especially when listening to complex songs.
An SQ System generally uses a smaller woofer and requires a smaller enclosure. A sealed enclosure would typically work best for this application.
Sealed enclosures are also known as “Acoustic Suspension” enclosures. When a speaker is placed in a sealed enclosure, the pressure becomes trapped in the box and restricts the cone movement, so the air inside the enclosure acts as a spring. The smaller the enclosure, the more pressure is exerted against the cone under movement.
The real advantage is that they just consume less space, not to mention they’re easier to design and construct. Choosing a sealed enclosure will give you clean and accurate bass with good low-end extension.