Menu
Forum
What's new
New posts
Live Activity
Search forums
Members
Registered members
Classifieds Member Feedback
Car Audio Discussion
General Car Audio
Car Audio Build Logs
Car Audio Equipment
Subwoofers
Speakers
Amplifiers
Head Units
Car Audio Help
Wiring, Electrical and Installation
Enclosure Design & Construction
Car Audio Classifieds
Car Audio Classifieds
Car Audio Wanted
Classifieds Member Feedback
Gallery
New media
New comments
Search media
SHOP
Shop Head Units
Shop Amplifiers
Shop Speakers
Shop Subwoofers
Shop eBay Car Audio
Test
Forum
Search
Search titles only
Search titles only
Log in / Join
Search
Search titles only
Search titles only
What's new
New posts
Live Activity
Search forums
Members
Registered members
Classifieds Member Feedback
Menu
Reply to thread
Forum
Car Audio Help
Enclosure Design & Construction
Need help tuning port low for a fixed volume box
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Message
<blockquote data-quote="bigbang" data-source="post: 3208871" data-attributes="member: 576408"><p>The only way I know how to lower a port tuning frequency is by enlarging a box, I don't know any other calculations. I want to place a pair of 10's in a port slotted box tuned to 25 Hz. The catch is the box must be a certain size for my trunk configuration. I want the response pretty linear between 25-60 Hz, with the roll-off occuring below 25 Hz because I personaly cant hear much below that point. I know that in a choice between high efficiency, small box size, and low end extension you cant have all three, so I am willing to lose alot of efficiency, my box is of fixed external dimensions, and my goal is reasonably flat output down to the mid 20's. I'm assuming that since the manufacturer frequency responce is rated down to 22 Hz my goal is realistic. Its a tough question but I'm totaly serious about it, and any help would be greatly appreciated. If its an unlikely idea or theres a better option out there please explain. I had them in a sealed box but I think this is a better option to keep the lows on par with the upper range. Thanks.</p><p></p><p>Box: Face 13" x 35 1/4" (About 3.15 ft^3 internal, ports must be on face)</p><p></p><p>Depth 15 1/2" (External dimensions, cannot be changed)</p><p></p><p>Subs: 2x Audiobahn AW1006T</p><p></p><p>Flame Q's (Don't laugh, I got a good deal a long while back)</p><p></p><p>Fs: 35.2 Hz</p><p></p><p>Qts: 0.72</p><p></p><p>Vas: 12 liters or 0.42 ft^3</p><p></p><p>Qes: 0.89</p><p></p><p>Qms: 3.93</p><p></p><p>EBP: 40</p></blockquote><p></p>
[QUOTE="bigbang, post: 3208871, member: 576408"] The only way I know how to lower a port tuning frequency is by enlarging a box, I don't know any other calculations. I want to place a pair of 10's in a port slotted box tuned to 25 Hz. The catch is the box must be a certain size for my trunk configuration. I want the response pretty linear between 25-60 Hz, with the roll-off occuring below 25 Hz because I personaly cant hear much below that point. I know that in a choice between high efficiency, small box size, and low end extension you cant have all three, so I am willing to lose alot of efficiency, my box is of fixed external dimensions, and my goal is reasonably flat output down to the mid 20's. I'm assuming that since the manufacturer frequency responce is rated down to 22 Hz my goal is realistic. Its a tough question but I'm totaly serious about it, and any help would be greatly appreciated. If its an unlikely idea or theres a better option out there please explain. I had them in a sealed box but I think this is a better option to keep the lows on par with the upper range. Thanks. Box: Face 13" x 35 1/4" (About 3.15 ft^3 internal, ports must be on face) Depth 15 1/2" (External dimensions, cannot be changed) Subs: 2x Audiobahn AW1006T Flame Q's (Don't laugh, I got a good deal a long while back) Fs: 35.2 Hz Qts: 0.72 Vas: 12 liters or 0.42 ft^3 Qes: 0.89 Qms: 3.93 EBP: 40 [/QUOTE]
Insert quotes…
Verification
Post reply
Forum
Car Audio Help
Enclosure Design & Construction
Need help tuning port low for a fixed volume box
Top
Menu
Home
Refresh