SEALED SECTION SIZE IN A 4TH ORDER BOX
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- čas přidán 26. 08. 2020
- I talk on this big topic on sealed subwoofer box size in a 4th order subwoofer box build.
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I got 6-18’s and they do great and sound best at 2.6 per.
Love your content. Cheers from, Ohio.
Love it
NICE!!!
IAM thinking on doing a box like your for 8 ,8in sub but i don't where to start
thanks for sharing...👍👍👍🇹🇹🇹🇹🇹🇹...
do you have a breakdown of how and why you choose the loading wall size? i am starting a 4th order build for an old skool spl challenge and want to get the best spl result for what i have.
Every cabin and build is different so no one answer. I start always around 75-90% cone area for port to shrink. Bigger ratios that are peaky should even be bigger then that at times I’ve learned.
@@JacobViral2 thanks i will be testing soon
thanks ive been wandering about that and couldn't find anyone willing to explain it i have a 6 15s that I've been waiting to go 4th order with and just didn't have enough info the box I run now will only kill the lows but not the upper end say 60 and upso time for a redesign
Hi, Iam interested have you tried ported vs bandpass 6th or 4th order? Wich is better for low hertz like 25-35hz
@@Skydeeppearls6th is better for the 20 to 40 hz range
Curious, when measuring say 25" of port length, would you measure in the middle of the port or from one edge to another Jacob? Also thanks for the info bout the sealed vs ported
Port length goes based on the center of port for length and same for ports that have multiple turns.
@@JacobViral2 I always thought this was the case, kept second guessing things n haven't gotten a straight answer till I figured id check with you. So thanks for making it clear. Keep up the good work its appreciated. There's tons to learn far as car audio goes at least
I'm running a sp4 v1 12 in a 3 to 1 4th powered by a w 4500. My sealed section was 1.5 and I couldn't play lows very well, I shrunk it to 1.1 and the lows got better but there still falling off around 27 hz might try shrinking ported from 3 cubes to 2.5. Portef tuned to 45
Nice still decent bandwidth. What did you meter?
@@JacobViral2 144 at 38 hz, bandwidth is great, it does peak really high around 37, still lots of tweaking to do
Isit worth sound deadning a normal ported box from inside?
if leaky yes, also could adjust the frequency response slightly and afew tenths of db louder potentially.
The bottom of the sealed section should be where the plexiglass is. Then the box would have a more "horn" effect. High peaks but not so musical tho.. it chould gain a whole db
Great video but I’m wondering why 5.8 to 1? I’ve heard of up to 3 to 1 but people say they are sloppy and peaky. I want to have a decent band width because I listen to a variety of music and want to build a 4th order for a SQ HDC3 12 that I have. Space isn’t an issue it’s for an Astro van.
I had the space and I always love atleast 4-5:1 ratio for a high loud peak to make it a lot louder for the power then most systems comparable. This build did a 156db+ on glass.
This isn’t for sound quality. This is a peaky disaster
@@johnviera3884it isn’t really a disaster, it was built for burp not bandwidth so he’s accomplished exactly what he wanted.
Man I need your knowledge , I want to do a dual 15 4th order for my 2002 Yukon xl so badly I want as wide of a frequency range I can have I listen to metal and rap.
Feel free to message me on Facebook/Instagram jacobviral
Can sealed section be bigger than vented section? Like 119 liters sealed and 26 liters vented netto volumes.
Yes that is called negative ratio 4th and usually results in louder lows
Hey jacob how many watts do u think the fi audio Q ferrite series could handle? They are rated for 1750rms
Depends on the enclosure but in general I would always say rated power clamped in the correct built enclosure. Some people have thrown over 2k to them while others under 1k with no issues just how the enclosure routes for the sub.
If you put polyfill in the sealed section will it make a difference in performance
It can help act as a slightly bigger enclosure and bring more low end response as the waves travel slower but overall I never had an interest or gain from it.
But would it be a 3:1 optimal
bigger ratio the better but lose bandwidth
@@JacobViral2 What's the recommended 12" port size relative to the fourth order ratio?
@@evynt9512 Most do 40-60% of cone area, so 45-68sq in of port?
@@JacobViral2 Simply: "L X W", How do people build variants, such as the compression? SPL Meter and a few principles?
Man I wanna do this so freaking bad
It’s a fun project
I have a 2012 f150 my trucks peak is around 45hz but my 4th order for my 2 sundown sa15's is 5.1 on the sealed side and 14.9 cu ft on my ported side 2.5- 1 ratio rear tuned to 47 port tuned to 24hz and plays down to 18hz and up to 50hz with a taramps md3k @1ohms I'm getting 146.0 db @37hz check out my build on my channel