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
Plans for an SPL Box, optimum tuning frequency? Trying to pass 150dB
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="RSDXzec" data-source="post: 8244920" data-attributes="member: 638347"><p>Working on designing an SPL box to compete with, the system belongs to my friend but we're trying to pass the 150dB mark.</p><p></p><p>Equipment is 4 American Bass XFL 15"s and 2 APSM-1500's, the subs will certainly be underpowered because the car will get upgrades later on to push more power and get more amps, however I'm trying to see how far I can get on this power with these subs.</p><p></p><p>So far from some basic calculations it's looking like 16.7cf internal before port displacement and with a quick design I did it seems I can get 15.55cf internal after port tuned to 46hz with 248 in^2 of port area.</p><p></p><p>Now his current system is 2 XFL 15"s on only 1000watts and we managed to pull off 141.6dB at 49hz in a ford festiva</p><p></p><p>(looks like this <a href="http://photos.carsguide.news.com.au/cgphotos/specs_photos/5DO.jpg" target="_blank">http://photos.carsguide.news.com.au/cgphotos/specs_photos/5DO.jpg</a>).</p><p></p><p>The current box is 6.5cf internal after port tuned to 32hz with very little port area because we struggled to fit it in the boot (something miserable like only 57in^2) so by no means an SPL box.</p><p></p><p>My question is, if the loudness peaked at 49hz with that box should I tune slightly lower like 46hz then play say a 50hz tone to get the max SPL out of this car? I know maximizing volume and port area are common sense but knowing which frequency to tune to and play for SPL is something I haven't dealt with before, I usually make music boxes.</p><p></p><p>Cheers.</p></blockquote><p></p>
[QUOTE="RSDXzec, post: 8244920, member: 638347"] Working on designing an SPL box to compete with, the system belongs to my friend but we're trying to pass the 150dB mark. Equipment is 4 American Bass XFL 15"s and 2 APSM-1500's, the subs will certainly be underpowered because the car will get upgrades later on to push more power and get more amps, however I'm trying to see how far I can get on this power with these subs. So far from some basic calculations it's looking like 16.7cf internal before port displacement and with a quick design I did it seems I can get 15.55cf internal after port tuned to 46hz with 248 in^2 of port area. Now his current system is 2 XFL 15"s on only 1000watts and we managed to pull off 141.6dB at 49hz in a ford festiva (looks like this [URL="http://photos.carsguide.news.com.au/cgphotos/specs_photos/5DO.jpg"]http://photos.carsguide.news.com.au/cgphotos/specs_photos/5DO.jpg[/URL]). The current box is 6.5cf internal after port tuned to 32hz with very little port area because we struggled to fit it in the boot (something miserable like only 57in^2) so by no means an SPL box. My question is, if the loudness peaked at 49hz with that box should I tune slightly lower like 46hz then play say a 50hz tone to get the max SPL out of this car? I know maximizing volume and port area are common sense but knowing which frequency to tune to and play for SPL is something I haven't dealt with before, I usually make music boxes. Cheers. [/QUOTE]
Insert quotes…
Verification
Post reply
Forum
Car Audio Help
Enclosure Design & Construction
Plans for an SPL Box, optimum tuning frequency? Trying to pass 150dB
Top
Menu
Home
Refresh