Benefits of a passive radiator

[Annao2485 10+ year member]

What would be the benefits of a passive radiator, never really understood there purpose?

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[silvercookie 5,000+ posts]

it acts like a port in a sealed enclosure

 

[rumblebee2 10+ year member]

he asked the benefits

 

[RAM_Designs 5,000+ posts]

More output out of less air space.

You can add mass(normally in the form of washers) to change the "tuning"

 

[Rich B 5,000+ posts]

No port 'huffing' (pumping), and as said above the tuning can be changed without making a new box.

 

[oldschool4me 10+ year member]

No port 'huffing' (pumping), and as said above the tuning can be changed without making a new box.

this

 

[Annao2485 10+ year member]

Maybe I should have said the purpose of a passive radiator and has anyone ever used one on there box?

 

[BobbyDD 10+ year member]

I have one with a 12" Boston G5 in a 1 cube box in my wifes car. I think it makes a big difference.

 

[rollerdj 10+ year member]

i thought about playing with a passive radiator in my next HT build. thats were you normally see them.

 

[PatFitz9 10+ year member]

The main benefit is space savings. You get the ported sound, without the size of a port. They are used a lot in home theaters due to the low tuning. A ported box tuned in the 20hz area would take a massive port, and in turn, you get a massive box in your living room.

 

[its_bacon12 10+ year member]

All of these are true but to me the best feature about passive radiator is that it doesn't unload at the incredible rate of which a ported box does below tuning frequency.

It saves a massive amount of gross volume, can change the mass of the radiator, no chuffing or port noise.

 

[timaishu 10+ year member]

Question. I have been wanting to build a low tuned HT box for an infinity kappa sub. The sub is currently, in a 1cf sealed box.

Could I cut a hole in the box and put a passive radiator in it and tune it lower? Will any radiator sub work?

 

[its_bacon12 10+ year member]

Well, The radiator takes up some space too. I would build a whole new box for that sub and just do it ported to save yourself the extra cost of a passive radiator.

And not ever radiator will work. It should atleast have the capability of the same amount fo excursion as a bare minimum.

 

[audioholic 5,000+ posts]

Running a PR requires a larger box than does its sealed counterpart... think ported box size, minus the port displacement. You cant just cut a hole in your sealed box and add a PR, unless your sealed box was grossly oversized, which is only the case if you have a 10" sub for that 1 cube box.

 

[timaishu 10+ year member]

Running a PR requires a larger box than does its sealed counterpart... think ported box size, minus the port displacement. You cant just cut a hole in your sealed box and add a PR, unless your sealed box was grossly oversized, which is only the case if you have a 10" sub for that 1 cube box.

Im confused by your last sentence. So are you saying I can or cannot do it?