By Sage Switzer. Car Audio. Published at Sunday, May 20th, 2018 - 12:23:54 PM.
We've heard systems from Kicker, Helix, and JL Audio demonstrated with an onoff switch, and the difference in sound quality is astounding. Factory system upgrade packages are available for a wide variety of vehicles, and they're a great option if you don't want to go through the hassle of replacing the factory radio.
Because bandpass boxes are super efficient within that range, they tend to boom. Their aggressive sound is great for rap, reggae, and hard rock. Not all subwoofers work well in bandpass boxes, though; consult our product information or call one of our Advisors to be sure.
You'll need to impedance match your sub amp and sub. It would be a shame and a waste of money to buy a couple of subwoofers and an amplifier, for instance, only to find out that the amp can't run the subs because wired together, their impedance would be too low for the amp to run without overheating. Remember, if you're adding a sub to a factory system, get a subwoofer amp with speaker-level inputs, so it can get its signal from the factory speaker wires.
A more economical way to upgrade your sound system without changing the factory receiver or speakers is to get a compact 4-channel amp to boost the power for your front and rear speakers. The Alpine KTP-445U Power Pack and the Clarion XC1410 4-channel amp are two examples of amplifiers that are small enough that they can be installed behind many dashboards and powerful enough to dramatically increase the quality and clarity of your sound. Both of these amps, as well as many others available at Crutchfield, feature inputs that can handle the high-level signal from the vehicle's factory speaker wiring. Look for an amplifier with "speaker-level inputs" as one of its features if you want to add it to a factory system.
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