What can I do against 'box sound' ?

[scottjoplin]

How does a box speaker produce impact that OB doesn't?

 

[bansuri]

A good loudspeaker doesn't "sound", It puts the music in the room, you couldn't even localize it in a proper stereo setup, no matter what technology is used.
What you call "open" is maybe the comb filter effect from an open baffle, that ripple really "sounds" but not transparent, rather phaser style.

 

[Pano]

No, I disagree with the comb filtering being an effect that gives OB its sound.

 

[scottjoplin]

Only a very poor OB would have comb filtering

 

[Bigun]

I thought it was simply a room effect, i.e. OB’s sound different because of the rear radiation interacting with the room in a way most speakers do not. What we hear is the power balance not on-axis FR. Maybe try cmparing OB and boxed out in the garden ?

The rest of it I always assumed is poor implementation / box too small - short path length echoes inside box escaping back through thin cone or a port.

 

[plasnu]

More comb filtering, more open? Maybe not, but well diffused low frequency due to dipole nature in the room may make speaker sound more open.

 

[plasnu]

>Maybe try cmparing OB and boxed out in the garden ?
A good idea.

 

[plasnu]

A very popular professional small monitor speaker, Amphion is not a dipole, but it has passive radiator on the back.

Many engineers say that Amphion has a trustful bass response for small monitor, less room dependent, and the mixes with them translate well.

 

[scottjoplin]

short path length echoes inside box escaping back through thin cone or a port.

Short path, as in a shallow cabinet, means the reflections have a relatively high frequency, making them easier to absorb.

 

[scottjoplin]

More comb filtering, more open? Maybe not, but well diffused low frequency due to dipole nature in the room may make speaker sound more open.

A true dipole has constant directivity.

 

[plasnu]

Really?

 

[scottjoplin]

Yes. Constant directivity loudspeaker designs

 

[Andersonix]

Short path, as in a shallow cabinet, means the reflections have a relatively high frequency, making them easier to absorb.

No....?

 

[scottjoplin]

You don't sound sure

 

[Andersonix]

Trying to put my objection into words: Reflections would be from all frequencies...?

 

[scottjoplin]

Does this make sense?:

"Will the shallow VTL and DCR enclosures cause audible reflections behind the Eikona?

On the contrary, it will raise their frequency and make them easier to absorb through use of acoustic damping material placed behind the Eikona."

FAQ - E J Jordan Designs

 

[42476]

A box with no parallel (internal) surfaces really helps; an Aperiodic vent can also help. This is addition to wall dampening, box stuffing, etc. If you have internal bracing; these should also be non-parallel to any inside surface. Not as easy to design or build but the results are well worth it.

 

[Andersonix]

I understand that higher frequencies are easier to absorb.
But, no, it does not make sense that earlier reflections cause the frequency to increase.

 

[scottjoplin]

It may be poor wording, I think it means the reflections will be higher in frequency than in a deeper enclosure.

 

[Andersonix]

Or maybe he took one mental shortcut too many and reached a wrong conclusion