bose=junk...why?

[WmAx]

Interesting you come after me but not Skeptic that multidirectional is superior to ALL front firing designs. Is that a true universal statement WmAx? Yes I should not have said all Omnipolar designs were inferior - but Mr. Superiority Snob Skeptic seems to think he knows everything so lets hear his design.

Thank you for revising your initial statement.

I am relaying respnses from an engineer - you are quite welcome to get into it with him

The link you provided, he said a very short line. When I read his statement, it seems that several inferences/assumptions could be made. Not a consice answer. He did not mention omni, either. Let's assume he meant multi directional, such as Bose implements.

Bose post seemed a bit strange because I have found all multi-directional speaker set-up sto sound BAD - and i mean BAD - expensive or not. The neat factor they may be but listenable - well if you know of one I should try I would eb happy to but because they're so bad no one carries them in my area - because if it was good at all it might actually sell.

With the presumption.... Essentially, the reason a multidirectional tweeter system composed of average tweeters is inherantly flawed, is because the wavelengths being tranmitted are short in relation to the spacing of the tweeters, especially considering the off axis behaviour of each individual tweeter and how it interacts with the other tweeters. This will result in various off comb filter/spurious effects. I am referring to designs with multiple tweeters on one plane or facing many different directions. However, this idea is not automaticly flawed, if executed in a manner that minimizes these effects. A simple, but effective method is to place a tweeter on the rear as well as front. However, this is not ideal. Better idea would be a tweeter with sufficiently small faceplate(or no faceplate) and small size motor(such as neodymium based) tht you can use an array arranged in a cylindrical pattern; this would have fairly linear behaviour. The main point here is by keeping the radiating areas of the speakers close enough to prevent/reduce the errors.... to keep power(summed polar) response as linear as possible throughout the entire bandwidth. Assuming you have acheived this objective, then placement in room is critical. The best omnipolar speakers, such as MBL's flagship line, that have nearly perfect horiztonal polar response at all axises, would sound terrible if room placement was not correct. Symmetrical set up is nesecarry(same distance from walls on both channels, etc.). Usually, minimum spacing from any wall must be at least 2.5' in order to achieve a 5ms or greater elapsed direct/reflecting signal, especially when treble is being reflected. The human auditory system primarily cues spatial information from high frequency information. Sufficient, flat response being reflected, but delayed within a suitable time window results in ambient enhacment. Inadequate time window will result in negative impact on all aspects of the music. Another option is to have a nearly perfect horiztonal response in 180 degree field, focused/limited disperion in the vertical field and essentially have the speaker start from the same position as the side walls. This removes the factor of direct/reflecting propertions/times in respect to the speaker vs. walls all together. Refer to Beveridge line array for this specific aspect.

-Chris