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Car Audio Help
Enclosure Design & Construction
design help for 2 SKAR SDR 15"s in a ported tuned to 33hz.
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<blockquote data-quote="mrpep" data-source="post: 8765085" data-attributes="member: 661076"><p>So According to Skar I need 3.75 c/ft. each sub and that's 7.5 c/ft. for both. The sub displacement is .875 each so 1.75 for both. So 9.25 c/ft. box, am I correct? I am also looking for 32 / 33hz.</p><p></p><p> I have a box design of :</p><p></p><p>38w x 26d x 16h = 9.15 c/ft.</p><p>Now I need a port. Can someone help me with a port? The subs would go up and the port back. I have put a lot of info below from the website and my vehicle. Can someone help? I would really appreciate it, thanks. </p><p></p><p>Info:</p><p>Vehicle: 2006 Toyota Highlander / suv</p><p>available space is: 38 wide x 18h x 26 deep</p><p>Type of music: mainly Hip Hop ( anything with deep bass really)</p><p>Power: one extra battery</p><p>Cables: 4 gage OFC</p><p>Amp: Alpine PDX1000.1</p><p>Head unit: Pioneer AVH2550NEX</p><p>Tune: 33hz ( this is what the mfr. is calling for it looks like)</p><p>Bracing: I was thinking a 1" diameter wood rod if necessary</p><p></p><p>Subwoofer specs:</p><ul> <li data-xf-list-type="ul">15-inch Dual 2 Ohm Voice Coil Configuration</li> <li data-xf-list-type="ul">Peak Power: 1,200 Watts</li> <li data-xf-list-type="ul">RMS Power: 600 Watts</li> <li data-xf-list-type="ul">Competition Grade Pressed Paper Cone</li> <li data-xf-list-type="ul">High Roll Foam Surround</li> <li data-xf-list-type="ul">Advanced Air Flow Cooling System</li> <li data-xf-list-type="ul">2.5" High Temperature Copper Voice Coil</li> <li data-xf-list-type="ul">Motor Weight: 97 oz</li> <li data-xf-list-type="ul">Frequency Response: 20 - 250 Hz</li> <li data-xf-list-type="ul">Sensitivity: 85.9 dB</li> <li data-xf-list-type="ul">Fs: 29 Hz</li> <li data-xf-list-type="ul">Re: Dual 2 Ω</li> <li data-xf-list-type="ul">Qms: 6.05</li> <li data-xf-list-type="ul">Qes: 0.75</li> <li data-xf-list-type="ul">Qts: 0.67</li> <li data-xf-list-type="ul">Mms: 299.0 gr</li> <li data-xf-list-type="ul">Nref: 0.247%</li> <li data-xf-list-type="ul">Cms: 0.11 mm/N</li> <li data-xf-list-type="ul">Bl: 16.36 n/a</li> <li data-xf-list-type="ul">Vas: 84.85 L</li> <li data-xf-list-type="ul">Sd: 754.7 cm²</li> <li data-xf-list-type="ul">Xmax: 13.5 mm</li> </ul><p></p><p><strong>RECOMMENDED ENCLOSURE SPECIFICATIONS</strong></p><ul> <li data-xf-list-type="ul">Recommended Sealed Volume: 2.95 ft³</li> <li data-xf-list-type="ul">Recommended Ported Volume: 3.75 ft³</li> <li data-xf-list-type="ul">Recommended Port Area: 42.0 in²</li> <li data-xf-list-type="ul">Recommended Tuning Frequency: 33 Hz</li> <li data-xf-list-type="ul"><em>Enclosure recommendations above do not include subwoofer, bracing, and port displacement</em></li> </ul><p><strong>SUBWOOFER MEASUREMENTS</strong></p><table style='width: 100%'><tr><td>Cut-out Diameter</td><td>13.99"</td></tr><tr><td>Mounting Depth</td><td>7.62"</td></tr><tr><td>Total Height</td><td>8.75"</td></tr><tr><td>Outside Diameter</td><td>15.39"</td></tr><tr><td>Magnet Diameter</td><td>6.00"</td></tr></table></blockquote><p></p>
[QUOTE="mrpep, post: 8765085, member: 661076"] So According to Skar I need 3.75 c/ft. each sub and that's 7.5 c/ft. for both. The sub displacement is .875 each so 1.75 for both. So 9.25 c/ft. box, am I correct? I am also looking for 32 / 33hz. I have a box design of : 38w x 26d x 16h = 9.15 c/ft. Now I need a port. Can someone help me with a port? The subs would go up and the port back. I have put a lot of info below from the website and my vehicle. Can someone help? I would really appreciate it, thanks. Info: Vehicle: 2006 Toyota Highlander / suv available space is: 38 wide x 18h x 26 deep Type of music: mainly Hip Hop ( anything with deep bass really) Power: one extra battery Cables: 4 gage OFC Amp: Alpine PDX1000.1 Head unit: Pioneer AVH2550NEX Tune: 33hz ( this is what the mfr. is calling for it looks like) Bracing: I was thinking a 1" diameter wood rod if necessary Subwoofer specs: [LIST] [*]15-inch Dual 2 Ohm Voice Coil Configuration [*]Peak Power: 1,200 Watts [*]RMS Power: 600 Watts [*]Competition Grade Pressed Paper Cone [*]High Roll Foam Surround [*]Advanced Air Flow Cooling System [*]2.5" High Temperature Copper Voice Coil [*]Motor Weight: 97 oz [*]Frequency Response: 20 - 250 Hz [*]Sensitivity: 85.9 dB [*]Fs: 29 Hz [*]Re: Dual 2 Ω [*]Qms: 6.05 [*]Qes: 0.75 [*]Qts: 0.67 [*]Mms: 299.0 gr [*]Nref: 0.247% [*]Cms: 0.11 mm/N [*]Bl: 16.36 n/a [*]Vas: 84.85 L [*]Sd: 754.7 cm² [*]Xmax: 13.5 mm [/LIST] [B]RECOMMENDED ENCLOSURE SPECIFICATIONS[/B] [LIST] [*]Recommended Sealed Volume: 2.95 ft³ [*]Recommended Ported Volume: 3.75 ft³ [*]Recommended Port Area: 42.0 in² [*]Recommended Tuning Frequency: 33 Hz [*][I]Enclosure recommendations above do not include subwoofer, bracing, and port displacement[/I] [/LIST] [B]SUBWOOFER MEASUREMENTS[/B] [TABLE] [TR] [TD]Cut-out Diameter[/TD] [TD]13.99"[/TD] [/TR] [TR] [TD]Mounting Depth[/TD] [TD]7.62"[/TD] [/TR] [TR] [TD]Total Height[/TD] [TD]8.75"[/TD] [/TR] [TR] [TD]Outside Diameter[/TD] [TD]15.39"[/TD] [/TR] [TR] [TD]Magnet Diameter[/TD] [TD]6.00"[/TD] [/TR] [/TABLE] [/QUOTE]
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design help for 2 SKAR SDR 15"s in a ported tuned to 33hz.
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