Passive radiator-which direction

[markw]

That depend on the tuning frequency. Some can have over 2kg's of mass on them. The 4 I put in one of my DIY subs definitely would bottom out due to gravity if they were "downfiring".

If weight is an issue I would expect the suspension would be fairly stiff to begin with. Gravity will have an equal affect whether it's facing sideways or down, wouldn't it?

In any case, I'm fairly confident that Velodyne knows what they are doing.

 

[darien87]

I just had to go home and check out the movement of the PR. I never realized that there is so much movement in it. Seems like at times it's pushing more air then the sub driver.. I put my fingers on the drivers while checking this out.

My radiators don't move much at all. But that's probably because I have two 18's in my sub.

 

[walter duque]

[

QUOTE]

If weight is an issue I would expect the suspension would be fairly stiff to begin with. Gravity will have an equal affect whether it's facing sideways or down, wouldn't it?

In any case, I'm fairly confident that Velodyne knows what they are doing.

[/QUOTE]
I have been giving it some thought and a downfiring PR makes a lot of sense. The PR does put out some major bass. I kind of like the idea, better than side firing like mine. I would call it best bang for the buck.

 

[Stereodude]

Gravity will have an equal affect whether it's facing sideways or down, wouldn't it?

Yeah, but the PR is only designed to move along one axis (just like a subwoofer driver it has a suspension to restrict movement to only that one axis). If that axis aligns with the gravitation pull on it you get movement.