Sealed mini speaker, 3-way

[jamescarter1982]

Yes, a Braun SM 1002.

thankyou they look pretty cool

 

[Heinrich]

O/k it ain't that discriminative, as quite a few fellows do so for their LS3/5s also Still wondering what it comes to once the excitement has settled, getting back to real, daily routine.

Regardless of all the back and forth, the referring speaker pair, the controversial one, has now stepped into daily routine. The bass was taken back by 4dB - the owner got used to its extension, and perfectly trusts the truth of it. Mind you, trust is essential to eventually focus on the music, voice content and so forth. Bass is given in correct proportion, and must not be exaggerated anymore. There's a little prob/ left with room acoustics, but only in general, no special issue. The room is too lively with a slight discomfort with too much midrange reverberation, masking a bit of the dynamics. It gets too loud easily, confusing the flow.

Conclusion: it is possible to have wide dispersion, and more than enough, and extended bass beyond belief from a LS3/5 sized speaker today. Digital equalization with multi-amping, modern driver design, chosing three-way, placement in a bookshelf all combined simply make it. For regular people nothing is left to be desired, it just plays true to source and best expectations, ready to explore new grounds in recorded music.

 

[rirelien]

Regardless of all the back and forth, the referring speaker pair, the controversial one, has now stepped into daily routine. The bass was taken back by 4dB - the owner got used to its extension, and perfectly trusts the truth of it. Mind you, trust is essential to eventually focus on the music, voice content and so forth. Bass is given in correct proportion, and must not be exaggerated anymore. There's a little prob/ left with room acoustics, but only in general, no special issue. The room is too lively with a slight discomfort with too much midrange reverberation, masking a bit of the dynamics. It gets too loud easily, confusing the flow.

Conclusion: it is possible to have wide dispersion, and more than enough, and extended bass beyond belief from a LS3/5 sized speaker today. Digital equalization with multi-amping, modern driver design, chosing three-way, placement in a bookshelf all combined simply make it. For regular people nothing is left to be desired, it just plays true to source and best expectations, ready to explore new grounds in recorded music.

I was interested in your speaker design. Other than IMD and frequency response, it seems people want more measurements .

I assumed you are based in Europe. If so, we need a Europe-based Amir or Erin with an NFS!

 

[Heinrich]

I was interested in your speaker design. Other than IMD and frequency response, it seems people want more measurements .

I assumed you are based in Europe. If so, we need a Europe-based Amir or Erin with an NFS!

Not exactly, me thinks. There's more to it than comes to the eyes first. The in-room response aka the diffuse field, steady state is fine; and here it comes: at quite different locations. On the sofa, on a chair at the dining desk, in the pantry kitchen. That's what people should ask for, not the 'listening window'. The integration of left/right speakers is also fine, in that none of the two stand out, except in very extreme positions in the room. Mind you, stereo isn't to be expected anyway at most listening spots. The wide dispersion helps with that a whole lot.

The spin, as they say, is for enthusiasts who are willing to follow unforgiving rules attached to the concept of stereo. Even regular people comply, when listening to a speaker pair at the dealer's. But using them at home--after a while of keeping the enthusiasm--doesn't have that precise stereo triangle, eyes straight (!), and so forth.

Od course the speakers shall allow for a semi-perfect stereo presentation once in a while, but that's not the focus for me (anymore).

 

[rirelien]

Not exactly, me thinks. There's more to it than comes to the eyes first. The in-room response aka the diffuse field, steady state is fine; and here it comes: at quite different locations. On the sofa, on a chair at the dining desk, in the pantry kitchen. That's what people should ask for, not the 'listening window'. The integration of left/right speakers is also fine, in that none of the two stand out, except in very extreme positions in the room. Mind you, stereo isn't to be expected anyway at most listening spots. The wide dispersion helps with that a whole lot.

The spin, as they say, is for enthusiasts who are willing to follow unforgiving rules attached to the concept of stereo. Even regular people comply, when listening to a speaker pair at the dealer's. But using them at home--after a while of keeping the enthusiasm--doesn't have that precise stereo triangle, eyes straight (!), and so forth.

Od course the speakers shall allow for a semi-perfect stereo presentation once in a while, but that's not the focus for me (anymore).

Yes, most people don't listen the way I listen (or perhaps you or many people on this forum.)

But the point is that the "controlled conditions" data WILL tell us the best case about the speeakers, and let us infer how they'll work in various conditions/rooms. In particular, the directivity data will shed light on what you mention above -- in real world conditions, sitting off-axis, with varying amounts of direct vs reflected/room sound, that starts to matter a lot.

None of this is to undermine what you have done, of course! I personally think it's great, and I like your theory. I run a small pair of 2-ways with very extended bass response, in-room into the 30s (!) from <5l sealed enclosure. But probably large IMD and very definitely SPL-limited. So nothing is for free. I would be fascinated to hear the same concept in a small 3-way.

 

[Heinrich]

So nothing is for free.

I could take a set of curves for amplitude frequency response, that's a fair request. On the other hand, would it not be enough to check the diffuse field aka steady state frequency response in-room at different positions? That would measure the consequence of the directivity directly. It would measure what I'm after with all the directivity control. Directivity control is not a valuable asset in its own.

Yep, it contrasts the spin, I know. The spin is made to predict something, but if I could measure that something directly, why not?

A set of curves for a variety of directions would allow for -- what exactly? Put the speaker into a standard room. virtually by calculation. What else, I've never seen an else ;-) I already know the dispersion pattern is very wide, especially in the mids. The lobing is kept well in check. No other irregularities except for the edge diffraction, that are mitigated by packing the speakers into a filled bookshelf.