subwoofers with dual opposed drivers

[TE5LA]

Sounds like you listened to a lot of subwoofers that were either poorly designed or more likely misconfigured somehow. This is not accurate at all. Dual opposed subwoofers do not cancel out any sound.

Well, they may cancel out the sound of the enclosure vibrating against the floor, which is probably a good thing

 

[TE5LA]

I have one of these, six 5-1/4" active drives opposing six 6-1/2" passive radiators with a 300-watt RMS amplifier. Unfortunately, it does not power on any longer. It was spooky how it played without being able to feel any vibration on the cabinet.

Cambridge Soundworks P300HD

P.S. I'm new here. Are sales links forbidden?

 

[Jukka]

Well, they may cancel out the sound of the enclosure vibrating against the floor, which is probably a good thing

The post was replied to speaks of Golden Ear sub that has dual opposing woofers, but also dual passive radiators and they are out-of-phase relative to the woofers, which will cause cancelling. The only questions are in which frequencies that will happen and how bad will it sound.

 

[Chrispy]

I have one of these, six 5-1/4" active drives opposing six 6-1/2" passive radiators with a 300-watt RMS amplifier. Unfortunately, it does not power on any longer. It was spooky how it played without being able to feel any vibration on the cabinet.

Cambridge Soundworks P300HD
View attachment 374997
P.S. I'm new here. Are sales links forbidden?

We have the equipment for sale subforum https://www.audiosciencereview.com/forum/index.php?forums/audio-equipment-for-sale-or-to-buy.29/

 

[Flaesh]

subwoofers move around if not dual-opposed, and the only thing helping that is weight. Especially on a wooden floor, the noise from a subwoofer moving about the floor can be huge

Usually subwoofers are mounted on walls (or in walls in good cases)

 

[denzel200219]

People say that having two subwoofers instead of one helps the room modes and acoustics and also smoothes out the frequency response. Would a dual opposed subwoofer count as two subs or one? And would it have a smoother frequency response than a sub with a single driver?

 

[ryanosaur]

People say that having two subwoofers instead of one helps the room modes and acoustics and also smoothes out the frequency response. Would a dual opposed subwoofer count as two subs or one? And would it have a smoother frequency response than a sub with a single driver?

It will count and behave only as one.

 

[MarkS]

Gimli said it best:

 

[Chromatischism]

People say that having two subwoofers instead of one helps the room modes and acoustics and also smoothes out the frequency response. Would a dual opposed subwoofer count as two subs or one? And would it have a smoother frequency response than a sub with a single driver?

It's two sources however in my experience they are so close together the difference is minimal and you can think of them as one.

 

[Kal Rubinson]

It's two sources however in my experience they are so close together the difference is minimal and you can think of them as one.

I find it hard to consider such subs as two sources since the typical distance between the two diaphragms is a tiny fraction of the wavelengths they emit. In addition, they are fed by the same signal and, in most cases, driven by the same power amplifier. It is no different from considering a sub with a passive radiator to have two sources.