By Sage Switzer. Car Audio. Published at Thursday, April 05th, 2018 - 18:58:35 PM.
Powering a subwoofer — Subwoofers require significantly more power than a brand-name or factory in-dash receiver can provide. A separate amp is a necessity. I want to add some oomph to a factory system.
Free-air systems save space and have flat frequency response. The woofer must be specifically designed for free-air use. The lack of a box makes them more convenient to install, but their power handling levels are usually much lower than their boxed counterparts.
Get alerts for sudden dangers. Alpine’s HCE-C305R camera with Active View offers an added degree of safety over ordinary cameras: alerts for moving objects behind and to the sides of your vehicle. You’ll see the items outlined and tracked as they move across your screen, and hear audible alerts that increase in frequency as threats get closer to your vehicle. Four different viewing modes ensure you’ll have all the angles covered. Plus, it's a universal fit—it works with any brand of aftermarket receiver with a camera input.
Many crossovers have extra input terminals to allow bi-amping. Instead of driving the woofer and tweeter with a single channel of amplification, you actually connect two sets of cables, with each set carrying the signal from a separate amplifier (or amp channel). This way, both low-frequency drivers (woofers) and high-frequency drivers (tweeters) receive dedicated amplification. Look for this feature if you're planning to put together a serious high-performance system.
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