Planetarium + Swarm v Linkwitz or other open baffle?

[gedlee]

I'm redoing the white paper right now, its almost six years old. Best is to read the reviews. These are all very recent and enlightening. Then you can read the white paper in a couple of weeks and find out why the reviews are so good.

[otto88]

Thanks again Earl

Will do

[Baldin]

About the Swarm

There is no doubt about using more subs will get you a better and more even bass.
Take a look at this work done by Harman:
http://www.harman.com/wp/pdf/multsubs.pdf

More subs give a more even exitation of the room modes, and thereby a more even freq. response.

/Baldin

[otto88]

Thanks Baldin, I had read the paper.
But didn't think even multi subs could equal dipoles

Cheers

[otto88]

Originally Posted by cuibono

You might like this thread: Measured monopole and dipole room responses

One of the things I took away from it is that in some rooms, below 40Hz, monopole and dipole may act the same.

the main thing I took away from it is from this post
http://www.diyaudio.com/forums/showt...om#post1884538

* 20 Hz - 35 Hz:

1 a ) Monopole bass and dipole bass show identical room time response in all locations A - D.
In all cases the envelope closely follows the input signal envelope.





* 35 Hz - 100 Hz:

2 a ) Dipole shows clearly better room time response than monopole in all locations A - D.

2 b ) Monopole room time response is the most sensitive to placement A - D.

2 c ) Dipole room time response is less sensitive to placement A - D than monopole, but more sensitive than dipole line array.

2 d ) Dipole line array room time response is the least sensitive to placement A - D.

2 e ) Dipole line array room time response is almost identical to dipole room time response in all locations A - D. This is due the limited hight (1.5m) of the array and thus the array directivity in this freq range is not enough to improve the response over the dipole.





* 100 Hz - 1 kHz:

3 a ) Monopole has worse room time response than dipole or dipole line array.

3 b ) Dipole has better room time response than monopole but worse than dipole line array.

3 c ) Dipole line array has the best room time response over monopole and dipole.

3 d) Monopole room time response is the most sensitive to placement A - D.

3 e) Dipole room time response is less sensitive to placement A - D than monopole, but more sensitive than dipole line array.

3 f) Dipole line array room time response is the least sensitive to placement A - D.

3 g) When approaching 1 kHz monopole and dipole room time responses are getting similar. This can be due to increased directivity of the monopole and decreased directivity of the dipole because of cone and baffle size.

3 h) At 1 kHz dipole line array still has the best room time response.


So while my thread started off re bass, I'm now exploring dipole line arrays

Thank you!