[Polarbear]

Just linking to a of open baffel system from Norway. This is a speaker designer who has fallen for OB's and abondon all box speaker. This is his setup now:




16 x 21" elements




Main speakers are Bohlender Graebener RD-75 crossed at 200hz

It's nearfield listening as you can see from the chair




The whole thread is in norwegian, but there is som nice pictures

http://www.hifisentralen.no/forum/index.php/topic,60636.0.html

Here is another guy

16" Altec's




Thread:

http://www.hifisentralen.no/forum/index.php/topic,57058.0.html

Bjørn

[mcgsxr]

WOW!  Guess I need to move to Norway so my wife can think that stuff is normal...

Love it, thanks for sharing.

[Russell Dawkins]

Long, cold winters in Norway   

Notice the utter lack of acoustic absorption in the system with the 16" Altecs.

Your first image is not loading for me.

[Rudolf]

Notice the utter lack of acoustic absorption in the system with the 16" Altecs.

Just curious. Where would you want to see that acoustic absorption? Baffle, walls ...??

Rudolf

[Russell Dawkins]

Just curious. Where would you want to see that acoustic absorption? Baffle, walls ...??

Rudolf

Well, my initial impression was that of a nearly bare room with reflecting surfaces everywhere - no carpet/rug, and nothing much to break up reflections on the walls. My first move in that room would be to make some kind of wide band absorption for almost the entire front wall (behind the equipment) - almost floor to ceiling. I did this on the cheap in my new mastering room by making a large 2X6 frame and hanging 3 sections of wall-to-wall carpet from it, front to back, with about an inch space between each layer. I then covered the whole thing with a rug I brought back from Armenia. Actually, it was sized to fit the rug. Subjectively, (I don't have the measuring capability to confirm results) this worked well.

In my experience, the common problem for domestic listening environments is a reverb time slewed toward the bass, due to inadequate bass absorption, and it isn't as easy to absorb bass energy as it is mids and highs. This, of course, is where that active absorber spoken of in the Spatial Black Hole thread comes in: http://www.audiocircle.com/index.php?topic=103187.0

[studiotech]

For those who want more info on the top system and where it progressed from(and its an interesting journey), see StigErik's thread from DIYAudio:

http://www.diyaudio.com/forums/multi-way/142015-my-open-baffle-dipole-beyma-tpl-150-a.html

Greg

[JohnR]

My first reaction was he must be an usual breed of basshead, with no mids or tweeters in sight... then I saw the RD75s 

 

[Rudolf]

I was curious because you were referring to the bass line array. As far as I followed the linked thread, it is a wooden house, and I expect the walls (floor and ceiling too?) to be very efficient bass absorbers. Possibly so much, that the lines are not even overkill ...

For the rest of it I see rather directive systems - wouldn't be surprised if front wall reflections are negligible. I can see your demand for almost no wall reflections in the mastering process. But for listening in that living room - no way. 

Rudolf

Well, my initial impression was that of a nearly bare room with reflecting surfaces everywhere - no carpet/rug, and nothing much to break up reflections on the walls. My first move in that room would be to make some kind of wide band absorption for almost the entire front wall (behind the equipment) - almost floor to ceiling. I did this on the cheap in my new mastering room by making a large 2X6 frame and hanging 3 sections of wall-to-wall carpet from it, front to back, with about an inch space between each layer. I then covered the whole thing with a rug I brought back from Armenia. Actually, it was sized to fit the rug. Subjectively, (I don't have the measuring capability to confirm results) this worked well.

[JohnR]

Plus, look at the listening distance.

I have no doubt that is a very impressive experience.

[scorpion]

Looking at Stig-Erik's current setup I could sympathize with Greg's Rythmik Servo subs for the very lowest octave even in an OB setup.
For nice integration with OB I think a well constructed Tapped Horn, round a 10"er perhaps, would be the budget sub solution.

/Erling

[JohnR]

Hm, I wouldn't think so Erling. I get a -3 dB of 30 Hz with no EQ, with the right (nearby) positioning of the sub. And that setup looks to have more than enough "woofage" to deal with a little EQ if it were needed.

[scorpion]

John,

I suppose you mean my TH suggestion. Maybe, I think it is about how you would like to feel the sound. 
If you meant the Servos my comment was more of hinting at the size. I would not take all H-baffles away.

/Erling