The 4th order thread

[RangerDangerV2 5,000+ posts]

Yeah, when competing a huge ratio would be better because of rise for me (MECA is classified by cone area + fuse rating, could run a tiny fuse with that kind of rise) but I'm not too concerned with competing right now. I'm just tired of being limited to a trunk build and want to switch it up and possibly get louder. Most of my listening is music at full tilt for long periods of time while driving lol
2 Zv3 10s with a huge ratio on a ton of power would absolutely rape everyone else in the trunk class

its not as easy as I make it look lol. 4th orders take a good amount of work in both design and build to make them do work. I designed mine at least 20 times until I was happy

 

[SounDrive Pro Seller]

its not as easy as I make it look lol. 4th orders take a good amount of work in both design and build to make them do work. I designed mine at least 20 times until I was happy

Yeah I get that as well. A musical box isn't going to perform as well as a burp box either lol

I'm just adding this to the list of things to do.... There's plenty of things in front of it... like ultracaps //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif and upgrading my rear suspension before it blows out

 

[RangerDangerV2 5,000+ posts]

Yeah I get that as well. A musical box isn't going to perform as well as a burp box either lol
I'm just adding this to the list of things to do.... There's plenty of things in front of it... like ultracaps //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif and upgrading my rear suspension before it blows out

my "burp" box plays flat within 2db from 25-60hz lol if thats not flat then I dont know what is

 

[SounDrive Pro Seller]

my "burp" box plays flat within 2db from 25-60hz lol if thats not flat then I dont know what is

I'm jealous... lol

 

[RangerDangerV2 5,000+ posts]

I'm jealous... lol

the power of the 4th order! lol

 

[anubis]

more simple terms, typically, large rear= lots of low end, but lacks on the higher end from what I have seen, and the opposite applies for smaller rear ends. But I am a fan of my Fc being in the 45-48hz range for daily. I am not the best at explaining things, because I cant really put them into simple terms very well. hopefully everyone understands this. Also, I am no 4th order master, I dont have all of the answers, but I do know a good amount, mostly from testing, and educating myself. So please, if anyone else has some things that they would like to add, feel free to do so, I could always use some more information!

What is Vb?

 

[Buck 5,000+ posts]

Yeah I get that as well. A musical box isn't going to perform as well as a burp box either lol
I'm just adding this to the list of things to do.... There's plenty of things in front of it... like ultracaps //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif and upgrading my rear suspension before it blows out

Getting that spoiler under control lol.

 

[SounDrive Pro Seller]

Getting that spoiler under control lol.

I'd remove it but it would be a PITA to get everything looking right... (And I would have to install and wire a third brake light)

Maybe I'll just jb weld it to the trunk. Lol

 

[Buck 5,000+ posts]

What is Vb?

Box volume.

 

[noble brown]

so im starting to turn some numbers... Vb, where do i pull this number from. specs for my type r's is pretty conservative and also im assuming I would use sealed specs, right? and is the correct units to use for Vas liters?

 

[Buck 5,000+ posts]

so im starting to turn some numbers... Vb, where do i pull this number from. specs for my type r's is pretty conservative and also im assuming I would use sealed specs, right? and is the correct units to use for Vas liters?

Vb can vary drastically depending on your goals and the woofer. All of the t/s parameters basically determine box size as far as maximum goes. This is ported box size.

Most 10's it's about 1 cube.

Most 12's it's about 1.5-2.5 cubes.

Most 15's it's bout 3-5 cubes

Most 18's it's 5-8 cubes.

 

---------- Post added at 04:12 PM ---------- Previous post was at 04:12 PM ----------

 

For the type r's you can do 2-2.5 tuned all over the place depending on what you want.

 

[RangerDangerV2 5,000+ posts]

Vb can vary drastically depending on your goals and the woofer. All of the t/s parameters basically determine box size as far as maximum goes. This is ported box size.
Most 10's it's about 1 cube.

Most 12's it's about 1.5-2.5 cubes.

Most 15's it's bout 3-5 cubes

Most 18's it's 5-8 cubes.

 

---------- Post added at 04:12 PM ---------- Previous post was at 04:12 PM ----------

 

For the type r's you can do 2-2.5 tuned all over the place depending on what you want.

for two of them I would suggest that, but with single spider suspension and such a low Fs already, that will get very sloppy on the low end. Too low of an Fc is terrible from my tests, lowest I would go is about 40. anything lower got really sloppy on almost anything. but to each his own. never tested with type r's

 

[Buck 5,000+ posts]

for two of them I would suggest that, but with single spider suspension and such a low Fs already, that will get very sloppy on the low end. Too low of an Fc is terrible from my tests, lowest I would go is about 40. anything lower got really sloppy on almost anything. but to each his own. never tested with type r's

Those were ported specs.

 

[RangerDangerV2 5,000+ posts]

Those were ported specs.

oh, sorry //content.invisioncic.com/y282845/emoticons/blackeye.gif.66a1670f5aaf7f406e783a63e3387dc5.gif lol

 

---------- Post added at 06:01 PM ---------- Previous post was at 06:00 PM ----------

 

this thread was SUPPOSED to be for 4th orders... I got confused lol

 

[Buck 5,000+ posts]

I'm sorry //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

So those are sa-12's you are running? What's the specs of the box now?