Anyone know how the new range of Bolzano Villetri speakers at
http://www.bolzanovilletri.com/ work? I know that they have a pair of upward firing woofers but how is the sound disperse? On the Duevel range, there is the 'dougnut shaped' horn to disperse the sound but I don't see anything here.
I am quite interested in omnidirectionals because of the contruction of my room which has various columns and protusions to distort sound, is there any literature on them?
http://www.bolzanovilletri.com/ work? I know that they have a pair of upward firing woofers but how is the sound disperse? On the Duevel range, there is the 'dougnut shaped' horn to disperse the sound but I don't see anything here.
I am quite interested in omnidirectionals because of the contruction of my room which has various columns and protusions to distort sound, is there any literature on them?
It rather depends upon what you call an omni-directional speaker. Siegfried Linkwitz has some stuff on his site -he's got his Pluto project, and several general articles well worth a read. www.linkwitzlabs.com
Omni's don't have to have a big bullet-type dispersal arrangement -Shahinian manage without, just using multiple treble units etc. OK, it's arguable if they are 'true' omnis, but it's not worth splitting hairs over. Then, bipoles operate in an omni-directional manner at certain frequencies: http://www.t-linespeakers.org/projects/tlB/radresponse.html
And of course, you have types with forward, and upward firing drivers -Castle's Howard S3 or the old Linn Isobarik for example, which are semi-omni in style. I suspect those you link to, which appear to be two boxes, have one upward, and one downward firing driver onto the small bullet suspended in the centre, which I imagine contains some tweeters.
I like omnis -they can be very effective. There isn't a great deal of available literature or theory to them though that I know of. Some just construct a 'normal' floorstander, chop the top at an angle of 45 degrees, and mount the drivers on that. Basically does the same thing: increase the ratio of reflected to direct sound.
Hope some of this is of help
Scott
Omni's don't have to have a big bullet-type dispersal arrangement -Shahinian manage without, just using multiple treble units etc. OK, it's arguable if they are 'true' omnis, but it's not worth splitting hairs over. Then, bipoles operate in an omni-directional manner at certain frequencies: http://www.t-linespeakers.org/projects/tlB/radresponse.html
And of course, you have types with forward, and upward firing drivers -Castle's Howard S3 or the old Linn Isobarik for example, which are semi-omni in style. I suspect those you link to, which appear to be two boxes, have one upward, and one downward firing driver onto the small bullet suspended in the centre, which I imagine contains some tweeters.
I like omnis -they can be very effective. There isn't a great deal of available literature or theory to them though that I know of. Some just construct a 'normal' floorstander, chop the top at an angle of 45 degrees, and mount the drivers on that. Basically does the same thing: increase the ratio of reflected to direct sound.
Hope some of this is of help
Scott
Let's see:
This enclosures folow the basic instructios:
-3 chambers
-first is a subwoofer -izobaric or not,depends on the case.
-the upper chamber is simply bass-reflex with driver oriented to tweeter.
-the midle chamber seems to be "type dispersal arrangement " but I don't think that is a proper arangement for the angle's.The Duevel example seems to me the BEST example of efficience on omni speakers.
Anyway,seems to be two tweeters mounted on reverse type.But I dont think that upper bass-reflex do the job very effective,comparing with classic aragement.This is only my opinion.
This enclosures folow the basic instructios:
-3 chambers
-first is a subwoofer -izobaric or not,depends on the case.
-the upper chamber is simply bass-reflex with driver oriented to tweeter.
-the midle chamber seems to be "type dispersal arrangement " but I don't think that is a proper arangement for the angle's.The Duevel example seems to me the BEST example of efficience on omni speakers.
Anyway,seems to be two tweeters mounted on reverse type.But I dont think that upper bass-reflex do the job very effective,comparing with classic aragement.This is only my opinion.
after Clement's comparsion with MBL and Duevel (http://stereotimes.com/speak101306.shtml) i was put into curiosity, but didn't find any opportunity to check the BVs, they are still not so really available
but once i've met occasionly a guy who works with couneter-apertour loudspeakers for 7 years, he told me very interesting story and showed me the BV abilities. i've listened to those Bolzano Villetri floorstanders and it seems they really works. not semi- (like others) but _true_-omnidirectionals. Two drivers workin in phase but against each other make a virtual spherical radiator in between, thus it excludes _at_all_ doppler's modulation. coz not drivers but a sphere is the source of sound. it emmits all the way as i can understand, and that's why we got not only direct but also a properly balanced reflected sound waves. As soon as i was listening to this guy and to the BVs i became to feel embarrassed with my scepticism and had to admit that counter-apertour works. i've glanced at direction diagram and banand it was ideally round and the frequency range was full, not like other omnis with cut-off at the lowest.
that was rather interesting introduction and i'm going to check it more precisely and by my own experiments in the nearest future.
but once i've met occasionly a guy who works with couneter-apertour loudspeakers for 7 years, he told me very interesting story and showed me the BV abilities. i've listened to those Bolzano Villetri floorstanders and it seems they really works. not semi- (like others) but _true_-omnidirectionals. Two drivers workin in phase but against each other make a virtual spherical radiator in between, thus it excludes _at_all_ doppler's modulation. coz not drivers but a sphere is the source of sound. it emmits all the way as i can understand, and that's why we got not only direct but also a properly balanced reflected sound waves. As soon as i was listening to this guy and to the BVs i became to feel embarrassed with my scepticism and had to admit that counter-apertour works. i've glanced at direction diagram and banand it was ideally round and the frequency range was full, not like other omnis with cut-off at the lowest.
that was rather interesting introduction and i'm going to check it more precisely and by my own experiments in the nearest future.
amsci99
I have a pair of Ohm I omnidirectionals; High tweeter, low tweeter, midbass mounted on top with a high tweeter and subwoofer front mounted.
The speakers provide a stereo image no matter where I am in the room. Personally, I prefer a higher degree of pinpoint imaging that can not be provided with this design. My 2¢
- Rob
I have a pair of Ohm I omnidirectionals; High tweeter, low tweeter, midbass mounted on top with a high tweeter and subwoofer front mounted.
The speakers provide a stereo image no matter where I am in the room. Personally, I prefer a higher degree of pinpoint imaging that can not be provided with this design. My 2¢
- Rob
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