Reductions of 25% to 24% in volume requirements are possible. Make sure that you add the volume displaced by the driver and bracing to arrive at a final enclosure volume. If you plan to stuff the enclosure, use 0.75*Vb as the net volume for the enclosure. When you add stuffing to the enclosure, the resonance frequency should decrease. The trick is to set your subwoofer’s volume, and you can do it in just a few seconds. Fast forward to 2:53 in the video above to follow along—the rest is a showcase of a specific subwoofer. CarAudioFabrication teaches you the basics of subwoofer box or enclosure volume. Learn how to adjust a variable to properly design the volume of the sub box.
The Dual® 12-inch Dual Bandpass Subwoofer Enclosure. If 10-inch diameter subwoofer drivers are a good fit for your vehicle, the Pyramid® 10" 1000W Dual Bandpass Speaker System comes with neon rings around the drivers, silver polypropylene cones, and rubber insulation. Stepping up to 12-inch diameter size, choices increase.

The ported boxes can be much larger than sealed boxes. Playing a subwoofer below the tuned frequency and power handling will produce a very poor sound and will damage the subwoofer. Do not lower the port below the manufacturer’s recommended frequency, this will only make things a lot worse. An enclosure with a port tuned to a specific

Step 3Connect The Ammeter. For getting the resonant frequency you just have to connect your ammeter (AC and DC measurer) to the subwoofer and amplifier. Remember:- The positive wire of the ammeter should be in the electric socket and the rest should be connected to the subwoofer and amplifier in a series fashion. You have two Kicker CompR 8" subwoofers and you want the right amp for them. They are DVC 4-ohm subs rated at 300 watts RMS each. Two 300 watts RMS subs together need a maximum total of 600 watts RMS. Using the chart in Step 2, 2 DVC 4-ohm subs can be wired together to form a 1-ohm, a 4-ohm, or a 16-ohm load.
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How sharply volume effects the power consumption has to do with the architecture of the amplifier. If it is a efficient class D, then power consumption will be some minimum bias plus a large component proportional to volume. If it's a class A, then the bias level will be much higher with a smaller remainder that goes up with volume.
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    • subwoofer box volume requirements