User manual POLK AUDIO DX8

[. . . ] · Vented pole piece--lets air circulate over the voice coil to keep it cool and in control even when the bass is really thumping. · 8 Ohm and 4 Ohm versions available--allows you to choose the impedance that suits your personal system design, including exotic isobaric and push-pull types. dX Series dX Series 2 Premium Performance Loudspeakers Premium Performance Loudspeakers 3 Who Is Going To Build Your Subwoofer Enclosure?Since the subwoofer enclosure is so critical to getting the best performance from your dX subs, you should ask yourself the following questions: 1. Do I really enjoy working with my hands? [. . . ] After measuring, subtract 1. 5" from each dimension. This compensates for the thickness of the material you use (simply double the thickness, i. e. : if you're using 3/4" material, subtract 1 1/2"; 1" material, subtract 2", etc), and will give you your usable (internal) dimensions. Record these dimensions here for future reference. dX Series Maximum dimensions Height:__________ inches Width:___________inches Depth:___________inches Usable dimensions (Minus 1. 5 inches)=______inches (Minus 1. 5 inches)=______inches (Minus 1. 5 inches)=______inches Usable volume=________cubic inches Usable volume=________cubic feet Multiply your usable Width x Height x Depth. The product will be the usable (internal) volume of your enclosure in cubic inches. Divide this number by 1728 (the number of cubic inches in a cubic foot). This will give you the internal volume in cubic feet. Divide your internal cubic feet by 2 (only if you are using a pair of dX subwoofers). Compare this number to the chart at the bottom of the technical sheet. Choose the recommended enclosure which is closest in size or that fits your desired type of enclosure. Now that you have all of your needed dimensions, you can begin cutting your wood. From the above chart you can tell how big each piece of wood should be. Here's a sample enclosure: Hole diameter dX8 = 7. 26 dX10 = 9. 30 dX12 = 11. 16 151/2" 14" 291/2" Maximum dimensions 15. 5 Height:__________ inches 29. 5 Width:___________inches 10. 5 Depth:___________inches Usable dimensions 14 (Minus 1. 5 inches)=______inches 28 (Minus 1. 5 inches)=______inches 9 (Minus 1. 5 inches)=______inches 3528 Usable volume=________cubic inches 2. 042 Usable volume=________cubic feet 10 1 /2 " dX Series 28" 6 9" Premium Performance Loudspeakers Premium Performance Loudspeakers 7 By looking at the chart at the end of the technical sheet, you find that this usable volume is slightly more than double the recommended volume for a single dX10, in either a sealed or vented enclosure. Assuming that you will be using a pair of woofers, this will work out well. If you are using a single subwoofer, you can cut your width in half. Since we will be using a pair of dX10 subwoofers, for our sample enclosure, we now need to determine the center divider displacement. This can be figured out by multiplying the height x depth x thickness of the divider (in our enclosure the thickness of the divider will be the same as the rest of our enclosure, 3/4") and subtracting that number from the total usable cubic inches. You now have all the dimensions you need to begin cutting out your wood. The illustration on page 7 shows a diagram of the enclosure with all the panel sizes that need to be cut. After you have cut all of the wood, it's time to start assembling your enclosure. Before you assemble your enclosure there are a few things we recommend doing. You will need to cut out the hole for your Dynamic Balance® subwoofer and your terminal cup, and pre-drill the holes for your screws. The terminal cup is a connector that allows you to plug and unplug the wires from your amplifier into the enclosure. [. . . ] This Warranty is in lieu of all other expressed Warranties. If this Product is defective in materials and workmanship as warranted above, your sole remedy shall be repair or replacement as provided above. be liable to you for any incidental or consequential damages arising out of the use or inability to use the Product, even if Polk Audio, Inc. or a Polk Audio Dealer has been advised of the possibility of such damages, or any other claim by any other party. [. . . ]