what is the relation between the Sound quality and the dispersion ?

[diysmartdeep21]

what happens if the speakers have more disperson......?
This actually give more advantage with the soundstage...

then what is the problem? with speakers like ss 7xxxxxx

so more disperson.. poor quality?

[pinkmouse]

Please do some research before posting. I suggest you read Vance Dickason's book "The Loudspeaker Cookbook", as a good primer for the subject before you post any further.

[diysmartdeep21]

sorry pink mouse i m in India and its not possible to get books from other countries even if i try it may take a complete month or two....

[GM]

Even though these white papers are about HT systems, maybe they will give you some insight into how dispersion/room interaction affects imaging/soundstaging.

GM

http://www.harman.com/wp/index.jsp?articleId=120

[ScottG]

The only reason for controlled limited dispersion (as being a good thing) is to reduce room reflections.

The question then becomes how much of a limit and where for a given setup? Then compare this with other methods that could be utilized to reduce the effects of reflections..

So yes greater horizonatal dispersion off-axis usually results in better imgaing IF room reflections don't interfere to much.

As for the SS 7": dispersion becomes limited as freq.s increase - in an effort to remove this most designers will use a tweeter that extends quite low in freq. that has a near omni directional nature where the crossover will be (between the tweet and the SS). The trade-off here is that the tweeter that will go this low will usually have much less disperion off-axis as freq.s increase (often quite limited above 10kHz). The SS Revelator tweeter, Seas Millenium tweeter, and the Dynaudio Esotar tweeter are prime examples of such tweeters.

[5th element]

Originally posted by ScottG
The only reason for controlled limited dispersion (as being a good thing) is to reduce room reflections.

The question then becomes how much of a limit and where for a given setup? Then compare this with other methods that could be utilized to reduce the effects of reflections..

So yes greater horizonatal dispersion off-axis usually results in better imgaing IF room reflections don't interfere to much.

As for the SS 7": dispersion becomes limited as freq.s increase - in an effort to remove this most designers will use a tweeter that extends quite low in freq. that has a near omni directional nature where the crossover will be (between the tweet and the SS). The trade-off here is that the tweeter that will go this low will usually have much less disperion off-axis as freq.s increase (often quite limited above 10kHz). The SS Revelator tweeter, Seas Millenium tweeter, and the Dynaudio Esotar tweeter are prime examples of such tweeters.

Although that is correct the 7" mid/bass are not being refered to here, the driver in question is scans ring radiator and regarding its limited dispersion in the high frequencies.

[ScottG]

Ahhhh! (my mistake..)

Above 10kHz I'd say its more a question of "air" and freq. balance..

[Snickers-is]

Originally posted by diysmartdeep21
what happens if the speakers have more disperson......?
This actually give more advantage with the soundstage...

then what is the problem? with speakers like ss 7xxxxxx

so more disperson.. poor quality?

If I understand you right you are refering to the SS ringradiator as a tweeter with especially good dispersion. The fact is that most common domes have better dispersion at high frequencies.

[454Casull]

I thought quite a few people pointed out that ring radiators have poor dispersion.

[navin]

any speaker operates within an enviroment. what works well in one location might not work in an other. many speakers including some very well respected one have controlled dispersion esp. in above 10Khz. ScanSpeak's 9900 tweeter for example has a slight wave guide to control dispersion.

like any thing else in life speaker building is the art of making compromises (no matter what the budget or size of speaker) mixed in with the science of speaker design.