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Message: <blockquote data-quote="mrpink" data-source="post: 1300452" data-attributes="member: 25241">Hello,In my truck, installing the subwoofer amp (and thereby taking the load off the Sony amp) was the biggest difference-maker. Then the door speakers, and I did the Forscan EQ-disable as the last step. Please note that low frequency (subwoofer) wavelength needs DISTANCE to become audible. The larger the subwoofer surface (or diameter), the MORE distance it will need for you to hear it. When you hear people's subwoofers pumping and booming as they drive by, that is an indicator that they're using subwoofers that are too LARGE. Their sub wavelength only becomes audible OUTSIDE of their car cabin. Inside, the driver is actually LACKING bass <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile    :)" loading="lazy" data-shortname=":)" />)))Therefore, in a sedan, a double 8" will present you with more bass than a double 10" or a single 12". I don't have the exact calculations in front of me, but two 10" drivers have a combined resonating surface of about 15". This wavelength needs MORE distance (before hitting a wall) to become audible then what a car cabin can offer. So, bass will be heard by the people at the bus-stop 10 feet away, but not by the driver.Unfortunately this basic principle has been overlooked even at car-audio shows throughout the eighties and nineties (where the most knowledgable installers used to present their work)... Even there, "the bigger the sub the better" belief was dominating the scene. We need to keep the bass INSIDE the car.I'd recommend two 8", or a single 10" for an F150 cabin. Anything bigger is for a bus, not for a car.If done right, you'll have overwhelming deep bass inside, while people on the street will NOT hear your music playing.Doing it right will involve:-chosing the right subwoofer driver as for size, frequency response, roll-off, impedance, and sensitivity-chosing the right sub amp that will work together in technical synergy with the driver-choosing the proper subwoofer housing to match the subwoofer's internal volume requirement-internal treatment of the subwoofer cabinet with proper filler material and bracing-blending the subwoofer output with the rest of the speakers, including signal timingsorry i gotta go... will finish later</blockquote>

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