i have sda2b's and was pondering the above. when i do the balance control test, the sda signal is much quiter than the rest.
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11-14-2005 05:18 PM #1
why are sda drivers as large as the mid bass drivers?
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11-14-2005 05:21 PM #2
Because the tweeters are only working with the stereo side. They are the same with tweeters disconnected.
Check your lips at the door woman. Shake your hips like battleships. Yeah, all the white girls trip when I sing at Sunday service.
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11-14-2005 05:23 PM #3
so...the sda drivers handle higher frequencies as well?
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11-14-2005 05:24 PM #4
There has been many threads posted on this question. I have a pair of 1A's and it is less audible on the checks on the Dimensional drivers when doing the balance test, and from what I can tell on the schematic, they have two dimensional drivers and one dimensional tweeter, and two stereo drivers and 1 stereo tweet.
scott
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11-14-2005 05:26 PM #5
the 2b's have 1 tweeter
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11-16-2005 01:27 AM #6
Nope... It's not necessary to cancel interaural crosstalk in the upper frequencies. 1st generation SDA's (1's, 2's and CRS's) had SDA tweeters, but they were dropped from subsequent models.
Originally Posted by sda2mike
As for the original question, I've always attributed the reduced apparent spl of the SDA MW's to the cancelation that's occurring.Last edited by Tour2ma; 11-16-2005 at 01:31 AM.
More later,
Tour...
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11-17-2005 03:36 AM #7
And on the relative size questions... while the stereo and SDA MW's are the same size, they are often not the same part number. And to add to the confusion some SDA models have fewer SDA MW's, e.g, the 2.3's and 3.1.
More later,
Tour...
Vox Copuli
Better to remain silent and be thought a fool, than to open your mouth and remove all doubt. - Old English Proverb
"It's easy to get lost in price vs performance vs ego vs illusion." - doro
"There is a certain entertainment value in ripping the occaisonal (sic) buttmunch..." - TroyD
"Death doesn't come with a Uhaul." - Dennis Gardner
Rebuilding Maggie 2-ch & Amazing 2-ch... Building 2-ch "wall"... Figuring out the HT
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11-17-2005 08:12 AM #8
Tour- the SDA2's (originals) also have an uneven number, two stereo drivers to one SDA driver. As far as I know, they used the same part number on all of them in that speaker.
Ludicrous gibs!
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11-17-2005 06:02 PM #9
That is my take on the drivers on the SDA-2 speakers. They used ALL the same drivers.
Kristi
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11-17-2005 06:17 PM #10
Yup... the original 2's used 3 MW6501's.
More later,
Tour...
Vox Copuli
Better to remain silent and be thought a fool, than to open your mouth and remove all doubt. - Old English Proverb
"It's easy to get lost in price vs performance vs ego vs illusion." - doro
"There is a certain entertainment value in ripping the occaisonal (sic) buttmunch..." - TroyD
"Death doesn't come with a Uhaul." - Dennis Gardner
Rebuilding Maggie 2-ch & Amazing 2-ch... Building 2-ch "wall"... Figuring out the HT
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11-17-2005 07:12 PM #11
They have to be the same size for the interaural crosstalk cancelation to work properly.why are sda drivers as large as the mid bass drivers?'Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end."
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11-17-2005 07:44 PM #12
Jesse,
I'm guessing that choice is response characteristic driven, i.e., FR and cone dynamics, rather than radiating area. Makes me wonder why different drivers were used in combination in the last generations...
More later,
Tour...
Vox Copuli
Better to remain silent and be thought a fool, than to open your mouth and remove all doubt. - Old English Proverb
"It's easy to get lost in price vs performance vs ego vs illusion." - doro
"There is a certain entertainment value in ripping the occaisonal (sic) buttmunch..." - TroyD
"Death doesn't come with a Uhaul." - Dennis Gardner
Rebuilding Maggie 2-ch & Amazing 2-ch... Building 2-ch "wall"... Figuring out the HT
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11-17-2005 11:12 PM #13
Since the thread is going this direction, can anyone tell me what the differences are in the MW65XX series drivers? They seem to all have about the same appearance to me. Thanks!
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11-18-2005 01:08 AM #14
Different drivers, different Q's. However, the drivers still need to have the same radiating area.
'Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end."
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11-25-2005 07:34 PM #15
Originally Posted by F1nut
that makes sence, if your cancelling out crosstalk from any size driver, best candidate would be a driver of same size and close specs. even if that wasnt the case, I think it would cost more money to design a smaller driver to do the same job. I.E. just make more of what you gotTheater - Polk LSi15, LSiC, LSi9 speaks, DIY Sub (142.5L box, SVS plus driver, 500 Watt plate amp)...Outlaw 990 pre/pro, Carver TFM45, 2 X Outlaw M200 . Rotel RB980 . PS3, Monster 3600 power center
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