What is a Subwoofer?
A subwoofer is a crucial component of a complete audio system because it delivers lower frequencies between 20 – 200 Hz, which traditional two-channel or surround sound setups can't produce on their own. In fact, subwoofers are responsible for the .1 in a 7.1 sound system to deliver all the low-frequency effects.
Subwoofers work seamlessly with the rest of your sound system as one unit, so you never miss a beat.
How Do They Work?
A subwoofer speaker uses large drivers called woofers to produce deeper sounds. These woofers are typically enclosed in a wood or plastic structure and look like any other speaker. The subwoofer then uses the large woofer and a built-in amplifier that powers the signal to produce deeper, cleaner bass.
But to reproduce high-quality sound, they have to deal with the crossover (when sound transitions from speaker to speaker) and phasing, which deals with the timing differences from identical signals.
- Low-Pass Crossover: The frequency where your speakers begin to roll off and the subwoofer beings to produce bass notes. Subwoofers work best when you set your crossover to 10 Hz above your speaker's lowest frequency range.
- 0/180 Degree Phase Switch: Woofers work best when they move forward and backward while in sync, but the bass cancels out if they are out of phase. If that happens, you can use the switch to "dial-in" your subwoofer.
Why Do You Need One?
As we said before, a subwoofer lets you feel the sound in your chest or down your spine instead of simply hearing it. And if you have a glass of water nearby, you can even see it when the sound causes the water to ripple. But there's more to it than that, and once you've experienced that deep bass, you won't want to go back. For instance, subwoofers will:
