Free Shipping on All Orders 1-866-764-1801

Vist our Online Store
+ Reply to Thread
Results 1 to 15 of 15
  1. #1

    Member Sales Rating: (8)

    Join Date
    Jan 2005
    Location
    Sunny South Florida
    Posts
    3,034

    Default why are sda drivers as large as the mid bass drivers?

    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.

  2. #2

    Member Sales Rating: (40)

    Join Date
    Jul 2001
    Location
    North Texas
    Posts
    18,401

    Default

    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.

  3. #3

    Member Sales Rating: (8)

    Join Date
    Jan 2005
    Location
    Sunny South Florida
    Posts
    3,034

    Default

    so...the sda drivers handle higher frequencies as well?

  4. #4

    Member Sales Rating: (1)

    Join Date
    Apr 2004
    Location
    Southern Cali
    Posts
    1,012

    Default

    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

  5. #5

    Member Sales Rating: (8)

    Join Date
    Jan 2005
    Location
    Sunny South Florida
    Posts
    3,034

    Default

    the 2b's have 1 tweeter

  6. #6
    Old School
    Member Sales Rating: (1)

    Join Date
    Dec 2002
    Location
    Higher & Dryer, Texas
    Posts
    10,176

    Default

    Quote Originally Posted by sda2mike
    so...the sda drivers handle higher frequencies as well?
    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.

    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...
    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

  7. #7
    Old School
    Member Sales Rating: (1)

    Join Date
    Dec 2002
    Location
    Higher & Dryer, Texas
    Posts
    10,176

    Default

    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

  8. #8

    Member Sales Rating: (4)

    Join Date
    Aug 2002
    Location
    PA
    Posts
    5,849

    Default

    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!

  9. #9

    Member Sales Rating: (0)

    Join Date
    Nov 2005
    Location
    Portland OR
    Posts
    24

    Default

    That is my take on the drivers on the SDA-2 speakers. They used ALL the same drivers.

    Kristi

  10. #10
    Old School
    Member Sales Rating: (1)

    Join Date
    Dec 2002
    Location
    Higher & Dryer, Texas
    Posts
    10,176

    Default

    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

  11. #11

    Member Sales Rating: (13)

    Join Date
    Mar 2002
    Location
    The Mars Hotel
    Posts
    30,429

    Default

    why are sda drivers as large as the mid bass drivers?
    They have to be the same size for the interaural crosstalk cancelation to work properly.
    '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."

  12. #12
    Old School
    Member Sales Rating: (1)

    Join Date
    Dec 2002
    Location
    Higher & Dryer, Texas
    Posts
    10,176

    Default

    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

  13. #13

    Member Sales Rating: (0)

    Join Date
    Oct 2004
    Location
    Jefferson City, Missouri
    Posts
    41

    Default

    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!
    [HOME THEATRE]
    35" SonyTrinitron
    Sony STR-DA90ESG (AVR)
    Carver TFM-55X (Amp for drivers)
    Carver TFM-55 (Amp for tweeters)
    Sony DVP-S530D (DVD)
    Sony CDP-302 (CD)
    Sony SLV-595HF (VHS 1)
    Sony SLV-678HF (VHS 2)
    Pioneer PL-L800 (Turntable)
    Sony TC-WR701ES (Twin Cass. Deck)
    Technics SH-8066 (EQ)
    POLK SDA SRS (Front)
    POLK Monitor 5B (Surr.)
    POLK CS-245 (Center)
    [2 CH]
    Carver C-5 (Preamp)
    Carver M-400t (Amp)
    Sony CDP-C85ES (CD)
    Technics SH-8055 (EQ)
    POLK SDA 1B

  14. #14

    Member Sales Rating: (13)

    Join Date
    Mar 2002
    Location
    The Mars Hotel
    Posts
    30,429

    Default

    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."

  15. #15

    Member Sales Rating: (5)

    Join Date
    Jun 2003
    Location
    northern nj
    Posts
    6,608

    Default

    Quote Originally Posted by F1nut
    They have to be the same size for the interaural crosstalk cancelation to work properly.

    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 got
    Theater - 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

    2 Channel -
    Anthem Pre 2l, Jolida JD100 CD player, CAL Sigma DAC, Carver m4.0, Polk LSi9 w external modified Crossovers (thanks Trey!)

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

     

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts