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woofer Definition:
A loudspeaker created to reproduce bass frequencies.
Subwoofer Selection Tips
When deciding to upgrade your audio system, adding a subwoofer can produce massive results. Adding volume at sub frequencies is like adding a third dimension to your music. Whether you're considering building a new audio system, or just adding one (or more) subwoofers to your factory system, this addition will give you the single, largest sonic improvement. Simply adding even a little bass will make a HUGE improvement.
I'll never forget my first experience listening to the heart-pumping sound of bass. I was listening to my friend's newly-installed system (he had a couple of 12's with a decent size amps), and it was literally shocking how natutal it sounded, how you could actually feel the music. I was completely amazed that you could actually feel the impact of the woofers. From that moment on,[link widoczny dla zalogowanych], I've been a car audio fanatic.
Choosing a subwoofer can be difficult. There are a few questions that you should ask yourself before actually running out and buying woofers.
What quality of sound are you looking for?
There are two main camps in the sound world: Sound Quality (SQ) or Sound Pressure Level (SPL).
Sound Quality alludes to just that.. An SQ System generally uses a smaller woofer and requires a smaller enclosure. A sealed enclosure would typically work well for this application.
SPL, alternatively, is for you Big Bass Lovers. If you're like me, and like a lot of impact with your music (extended bass response and 3 dB more efficient gain), then you're probably looking for a ported enclosure.
Sealed enclosures are also known as Acoustic Suspension enclosures. When a speaker is put 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 tinier the enclosure,[link widoczny dla zalogowanych], the more pressure is exerted against the cone under movement. With a sealed enclosure of predetermined volume, we can also predict the cut-off frequency and Q* of the system.
Sealed enclosures will also forgive minor mistakes in design (up to 10 percent),[link widoczny dla zalogowanych], without major effects on sonic performance.
The real advantage is that they just consume less space, not to mention they're simpler to design and construct. Choosing a sealed enclosure will give you clean and accurate bass with good low-end extension.
Ported enclosures are very similar to a sealed enclosure in construction, but feature an additional opening for an attached port. This allows the rear-radiated energy to be phase inverted (matched in time) and to become in phase with the energy from the front of the speaker cone, essentially doubling the effective cone area.
The main disadvantage with a ported enclosure is that the design and construction are not very forgiving of errors. Unlike a sealed box, you must determine a number of different parameters: the box volume, tuned frequency, port area,[link widoczny dla zalogowanych], and port length. But, the advantage is huge you'll get more output with the same number and size of woofers.
However, with all of that additional output there's always a trade off. More bass naturally means more space.
You're probably wondering, can a ported enclosure sound as good a sealed enclosure? The answer is, yes, but it's different in that it will have a slight peak around the tuning frequency (35 Hz) and roll off very quickly. Both types of enclosures have true supporters. What you use really boils down to your application and how they load in your vehicle.
How much space are you willing to give up?
Now, that you've clarified your music tastes, you'll need to decide which one of the enclosures will fit your needs and your vehicle.
Before you make your purchase, it's also a important to find out how much air space and what type of enclosure is required for your dream woofers. Most manufacturers will ha
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