can someone give me some insight on passive radiators?

[Ridinhi 5,000+ posts]

When using pr's,are they only for sealed use or can you use the ported also?

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[quackhead 10+ year member]

*shrugz*...I have never used them, but I do believe they are suited to sealed. My brain says no in ported due to the added flexing and possible cancellations due to fluctuating port velocities and crap like that....*shrugz*

 

[LBC]

Ports = passive radiators. They are performing the same function. With that said, it should be common sense to know not to use both. Either or.

 

[Ridinhi 5,000+ posts]

Ports = passive radiators. They are performing the same function. With that said, it should be common sense to know not to use both. Either or.

calm down dude,just asking. And thanks for the info anyways

 

[LBC]

calm down dude,just asking. And thanks for the info anyways

I am calm brother. That's just how I talk //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif Samuel Jackson ftw

 

[Buck 5,000+ posts]

Passive radiators seem kind of pointless to me. Why not just do ported?

 

[Ridinhi 5,000+ posts]

I am calm brother. That's just how I talk //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif Samuel Jackson ftw

oh,ok,that explains it all,lol

 

[Ridinhi 5,000+ posts]

Passive radiators seem kind of pointless to me. Why not just do ported?

Oh,i am going ported...just getting some opinions on passive radiators.

 

[T3mpest 10+ year member]

Passive radiators seem kind of pointless to me. Why not just do ported?

Well, let's say you want to do a fifteen tuned low and have 4 cubic feet of space to work with.. What do you do.. With a standard port you don't even try, you do a ported twelve lol. With passives you can tune to any frequency you want and the "port" itself takes up no space inside the box.. My current setup is 5 cubes in a trunk tuned a 25hz.. If I wanted to build a proper sized port for 2 15's tuned anywhere near that low I'd need a couple extra feet of space just for the port, no way it'd happen. For subs with ALOT of motor force, like TC sounds drivers for a good example you often need very little airspace to get good low end output, but you really need a large port because of the air they can move. Also, you dont' have any issues with port compression or port noise for that matter. Just cut two holes and go.. Lastly, you can change tuning on the fly. I can go anwhere between 22hz and 45hz by just taking weight off of my passives. In my case, the passives have weight on the front side, I can take weight off of them in 30 seconds and BAM sounds like a whole new box.

Passives take the best parts of ported, the extra output and effecicency, but takes away the downside, bigger box. Instead you get ported output in the box size not much bigger than you'd need for a sealed enclosure.

 

[Buck 5,000+ posts]

Well, let's say you want to do a fifteen tuned low and have 4 cubic feet of space to work with.. What do you do.. With a standard port you don't even try, you do a ported twelve lol. With passives you can tune to any frequency you want and the "port" itself takes up no space inside the box.. My current setup is 5 cubes in a trunk tuned a 25hz.. If I wanted to build a proper sized port for 2 15's tuned anywhere near that low I'd need a couple extra feet of space just for the port, no way it'd happen. For subs with ALOT of motor force, like TC sounds drivers for a good example you often need very little airspace to get good low end output, but you really need a large port because of the air they can move. Also, you dont' have any issues with port compression or port noise for that matter. Just cut two holes and go.. Lastly, you can change tuning on the fly. I can go anwhere between 22hz and 45hz by just taking weight off of my passives. In my case, the passives have weight on the front side, I can take weight off of them in 30 seconds and BAM sounds like a whole new box.
Passives take the best parts of ported, the extra output and effecicency, but takes away the downside, bigger box. Instead you get ported output in the box size not much bigger than you'd need for a sealed enclosure.

Lol, I know how they work. I just am not a fan.

 

[Ridinhi 5,000+ posts]

Well, let's say you want to do a fifteen tuned low and have 4 cubic feet of space to work with.. What do you do.. With a standard port you don't even try, you do a ported twelve lol. With passives you can tune to any frequency you want and the "port" itself takes up no space inside the box.. My current setup is 5 cubes in a trunk tuned a 25hz.. If I wanted to build a proper sized port for 2 15's tuned anywhere near that low I'd need a couple extra feet of space just for the port, no way it'd happen. For subs with ALOT of motor force, like TC sounds drivers for a good example you often need very little airspace to get good low end output, but you really need a large port because of the air they can move. Also, you dont' have any issues with port compression or port noise for that matter. Just cut two holes and go.. Lastly, you can change tuning on the fly. I can go anwhere between 22hz and 45hz by just taking weight off of my passives. In my case, the passives have weight on the front side, I can take weight off of them in 30 seconds and BAM sounds like a whole new box.
Passives take the best parts of ported, the extra output and effecicency, but takes away the downside, bigger box. Instead you get ported output in the box size not much bigger than you'd need for a sealed enclosure.

pics of your box?