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2 Soundqubed HDC3.0,15's box build ideas and opinions
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<blockquote data-quote="Beatin2door" data-source="post: 8356627" data-attributes="member: 664842"><p>I estimated my enclosure volume to be roughly 10.6 cubes before my port and sub's go in. This should give me close to 9 cubes I'm thinking after port and suabs. I estimated the displacement of each sub to .22 I couldn't find the actual displacement , and with a port measuring 14.875 tall 7.5wide and 18 inches deep it should displace 1.4 cubes. I added 1.5 inches to port wall width to account for 2 3/4inch thick port walls. My outside enclosure demensions are 16 3/8 tall, 39 inches across the front, and 34.5 inches deep. Soundqubed told me with 133 square inches of port I would need a 18 inch long port wall for 34hz tuning. Does this sound about right? Here's my problem i can't make my box any wider or taller or its not going to slide in to the trunk from the back seat, I can go deeper. I estimated the woofers to be 15.75 inches in overall diameter and because I need both sub's and port on the baffle this leaves me with a port that can be no wider than 7.5 inches and no taller than 14 7/8 which only gives me 111 square inches of port opening. I know this is gonna affect tuning so I will have to change my port wall length to keep the same tuning and the change in port length will affect my box volume.What effects will the narrower port opening have on the output of the box. I guess I could angle the the front of my box so my sub's are angled slightly towards each other to allow for a wider port between the subs. This would mean designing another box.</p></blockquote><p></p>
[QUOTE="Beatin2door, post: 8356627, member: 664842"] I estimated my enclosure volume to be roughly 10.6 cubes before my port and sub's go in. This should give me close to 9 cubes I'm thinking after port and suabs. I estimated the displacement of each sub to .22 I couldn't find the actual displacement , and with a port measuring 14.875 tall 7.5wide and 18 inches deep it should displace 1.4 cubes. I added 1.5 inches to port wall width to account for 2 3/4inch thick port walls. My outside enclosure demensions are 16 3/8 tall, 39 inches across the front, and 34.5 inches deep. Soundqubed told me with 133 square inches of port I would need a 18 inch long port wall for 34hz tuning. Does this sound about right? Here's my problem i can't make my box any wider or taller or its not going to slide in to the trunk from the back seat, I can go deeper. I estimated the woofers to be 15.75 inches in overall diameter and because I need both sub's and port on the baffle this leaves me with a port that can be no wider than 7.5 inches and no taller than 14 7/8 which only gives me 111 square inches of port opening. I know this is gonna affect tuning so I will have to change my port wall length to keep the same tuning and the change in port length will affect my box volume.What effects will the narrower port opening have on the output of the box. I guess I could angle the the front of my box so my sub's are angled slightly towards each other to allow for a wider port between the subs. This would mean designing another box. [/QUOTE]
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