The Advantages of Floor Coupled Up-Firing Speakers

[graaf]

Originally Posted by markus76

Has your last post anything to do with Carlson and my comment that his designs are not unorthodox??

orthodox-unorthodox - lexical question, perhaps I shoud have used another description eg. unconventional

but as I can see it in substance we agree, because You wrote:

Originally Posted by markus76

Did you read the Carlson paper? It exactly describes the same principles that led to flush mounting or constant (high) directivity concepts.

In answer I ask You about my first post because I have said there that:

Originally Posted by graaf

I came to believe that what Dr Geddes writes on the topic of room reflections is in the end of the day the same thing that Carlsson (...) have written on the subject. And that in their designs they wanted to achieve the same end - to eliminate the detrimental effect of room reflections.

in this sense they are both fundamentally orthodox

[graaf]

Originally Posted by markus76

I answered this now a couple of times. How often do you want me to repeat it?

well, repeat what?

that "we still try", that "We just don't know yet" or that:

Originally Posted by markus76

In the light of facts only one approach is reasonable: make the sound field in the listening space similar to the sound field of the original

?

All I would like You to do is to decide on Your position - is it "we just don't know yet" or is it "In the light of facts only one approach is reasonable"?

[markus76]

There's nothing to decide. These two topics are not mutually exclusive.

[dantheman]

Originally Posted by graaf

well, repeat what?

that "we still try", that "We just don't know yet" or that:



?

All I would like You to do is to decide on Your position - is it "we just don't know yet" or is it "In the light of facts only one approach is reasonable"?

It seems he's expressing the same idea just from 2 different angles. At least that what my take is on what he's saying.

Dan

edit: sorry, Markus got his post in first.

[tinitus]

Right now Im listening to 3way dipole "setup"
Actually, drivers are just placed on the floor, on their magnets

Its kind of omni, I would say
Should I do another "omni", it would most likely look very much like Carlson
Mind you, not the old vintage, but the later mr Carlson(Sweede)

Which means ALL drivers placed close to floor, but slightly angled

Funny thing is that despite the drivers are positioned close to the floor, soundstage seems quite normal in height

[markus76]

If you like the sound coming from the floor...

[tinitus]

I expected that too, but it sounds perfectly normal
Quite surpricing, yes
Very precise and correct actually

Apart from the drivers jumping when I play loud, and loose items moving

Yes, I have to conclude theres potential in placing drivers close to the floor, if done correctly

[markus76]

Define "normal".

[tinitus]

Like when you "see" the musicians placed at same height as you when you sit listening

Whether thats correct is debateable, but its the only option we can perceive as acceptable
Maybe ideally slightly above

Ofcourse there also need to be some effects coming from other than an exact point, to give some sense of "room"
I suppose thats what you call ambience

But to me, the source of sound, meaning the musician, should always be placed accurately, and pin pointed
And I mean ALL musicians in a band

All this ofcourse also relates to distance from speakers
Im sitting about 3 meters away
A bit more would be better, but then I would need speakers to be wider apart also
I prefer distance between speakers to be equal to listening distance

[dantheman]

Right now I'm experiencing my first satisfying stereo experience in my residence--which I've been doing most of the day. I've searched long and hard for such a beast and found it by copying some ideas from Dr. Geddes. I put together some drivers that would achieve something like constant directivity from 1kHz to 20kHz (I couldn't reasonably build better)and aimed them to cross in front of me by about a meter so that the lateral reflection would hit my opposite ear judging by and of incidence equals the angle of reflection. Maybe the real reason this works is because the the smoothest part of the tweeters response is on axis with the ear now. There is something to his madness and sensibility for his confidence in the approach. Now I'm thinking he might not be crazy with his approach to bass.

Has anyone heard a similar system done with an OB woofer?

Dan