so i made a new box today...

[T3mpest 10+ year member]

lol sorry was thinking too many things at once. If you have enough height to fit a cutout for a 18, we can totally fix this problem for 120 dollars lol. DIYCable.com Get 2 of the exodus audio 18 Passive radiators with mass kits.

 

[kwitcherbichin 10+ year member]

It is possible but it requires alot of effort and manipulation bro. I have seem people glass the side panels to get the airspace. People lose their tries for a cube and a half...

ima find a way to make it work with the proper space. i might built another box 2morrow

 

[kwitcherbichin 10+ year member]

lol sorry was thinking too many things at once. If you have enough height to fit a cutout for a 18, we can totally fix this problem for 120 dollars lol. DIYCable.com Get 2 of the exodus audio 18 Passive radiators with mass kits.

passive radiators is kinda like a sealed box in a way isnt it

 

[T3mpest 10+ year member]

nope it's exactly the same as ported. The only real difference is that instead of the woofers exciting the air inside a port, they excite heavy cones that arent' being powered by anything. To change tuning you simply add mass to the passives to lower their resonant frequency, just like adding length to a port adds mass to the port since it's bigger. The upside to this is that passives take up no space and lowering their tuning doesnt' take up space either. I have more than enough port area for my 2 15's. I have 4 15 passive radiators, so even at full blast they only have to move 25mm or so, which they can move like 35. Port area wise it's like a 13" wide port or something silly lol. I also don't need it to be 15feet long to get tuning correct.

 

[kwitcherbichin 10+ year member]

nope it's exactly the same as ported. The only real difference is that instead of the woofers exciting the air inside a port, they excite heavy cones that arent' being powered by anything. To change tuning you simply add mass to the passives to lower their resonant frequency, just like adding length to a port adds mass to the port since it's bigger.

and it has alot of output also? sounds bada$$.

 

[T3mpest 10+ year member]

Yeah, same ouput as you get out of a ported box with equal airspace and proper amounts of port area. Only downside is it costs money. Being able to change tuning is nice.

 

[kwitcherbichin 10+ year member]

Yeah, same ouput as you get out of a ported box with equal airspace and proper amounts of port area. Only downside is it costs money. Being able to change tuning is nice.

i had some house speakers with dummy speakers as i call them =] they sounded great too be small. but yea i wanna make a bos with interchangable ports that u bolt/screw on.

and with the current problem i have if i made the port come out of the box would that help or is the port just too small.

 

[T3mpest 10+ year member]

Port is too small. Look at it this way, your already tuned at 26hz, any lower won't magically give you lows, even chopped and screwed stuff goes to 25hzish at lowest usually, most of that bass is still around 30hz. Tuning at 20hz and sealed are almost the same thing, 15hz and sealed will model identically usually, unless you use alot of airspace and really make the port massive, like in a home. Right now your subs have lots of room, your port on paper should be providing lows. All those things are usually good for lows, yet your lows aren't good. The only thing left is that your port is too small. Download tones and mess with the box if you want to double check. Download a 25hz tone and you'll probably see that maybe half way up the volume knob it stops getting louder. Compare it to a 40hz tone, 40hz will probably have a lot more linear volume increase as the knob goes up. If that is true, the port is definetly the issue.

 

[kwitcherbichin 10+ year member]

Port is too small. Look at it this way, your already tuned at 26hz, any lower won't magically give you lows, even chopped and screwed stuff goes to 25hzish at lowest usually, most of that bass is still around 30hz. Tuning at 20hz and sealed are almost the same thing, 15hz and sealed will model identically usually, unless you use alot of airspace and really make the port massive, like in a home. Right now your subs have lots of room, your port on paper should be providing lows. All those things are usually good for lows, yet your lows aren't good. The only thing left is that your port is too small. Download tones and mess with the box if you want to double check. Download a 25hz tone and you'll probably see that maybe half way up the volume knob it stops getting louder. Compare it to a 40hz tone, 40hz will probably have a lot more linear volume increase as the knob goes up. If that is true, the port is definetly the issue.

yea thats how is does with the higher notes. it just keeps gettin ****in louder n louder. i mean its nice as hell to be loud but thats not me lol. so i built a nice box but its wrong =[...

so how big should a port be for these subs. i dont want an l port just a single simple port. if u can give me those measurments that would be great if its possible, or give me the absolute minimal for around 24-7 hz.

 

[AudioDave]

which one should be 18.4 the 20 on the port?

Yes the length of it. I did the math 2 times and its the same each time.

 

[kwitcherbichin 10+ year member]

thats the box to whom is curious

 

[hatedonmostly 5,000+ posts]

Another fail box thread by honda_xxx. What a surprise!

 

[kwitcherbichin 10+ year member]

Another fail box thread by honda_xxx. What a surprise!

im sure im still louder then u ;]

so have a nice day

 

[hatedonmostly 5,000+ posts]

im sure im still louder then u ;]
so have a nice day

Louder than me with your fart box that you admit can't hit the low notes?

Yep, that's what I thought.

 

[kwitcherbichin 10+ year member]

Louder than me with your fart box that you admit can't hit the low notes?
Yep, that's what I thought.

it can do low notes but not like i want. doesnt mean its a fail or fart box u critter.