multiple tweeters?

zombiemusic
zombiemusic Posts: 65
edited May 2009 in Speakers
Question: As I see pictures of the SDA series and McIntosh speakers I notice that not only they have multiple midrange and bass drivers but multiple tweeters as well. Yet on basically all new speakers theres only one tweeter. Why did they sometimes use multiple tweeters and now they usually only use one?
My Gear

Phase Linear 4000 preamp
Cambridge Audio Azur 640c v.2 CD player
Dual 1219 Turntable
Two Harman Kardon Citation 16 amps
Monitor 50 speakers Bi-amped...
(dieing to upgrade to rti A9)
KLH Tremor Series sub (10 inch 125 watts)
Post edited by zombiemusic on
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Comments

  • Systems
    Systems Posts: 14,873
    edited May 2009
    With multiple closely spaced tweeters reproducing the same frequencies there will be destructive interference effects between them called comb filtering.If for instance two tweeters were to be placed one above the other,there combined vertical dispersion pattern will be narrowed compared to using just one.In years past Snell, Kef and M&K have used a three vertical tweeter arrangement to help reduce hi frequency floor and ceiling reflections in THX HT systems.IIRC the Mac speaker has a full row of tweeters which will in efffect create a vertical line source.
    Testing
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  • ben62670
    ben62670 Posts: 15,969
    edited May 2009
    One of the great surceases of the SDA2.3TL is that they mainly use just one tweeter. The others are so attenuated that they might as well not be there.
    Ben
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
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    Ben
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