What ohm rateing are the Sda 1b's ?

faster100
faster100 Posts: 6,124
edited October 2004 in Speakers
heading says it all... I know someone knows... Just curious..
MY HT RIG:
Sherwood p-965
Sherwood sd871 dvd
Rotel 1075 amp x5
LSI15 mains
LsiC center
LSIfx surround backs
Lsi7 side surrounds
SVS pb12/plus2

2 Channel Rig:

nad 1020 Pre-amp
Rotel 1080 stereo amp
Polk sda 2B
kenwood grunt Tuner
realistic lab 450 TT
Signal cable IC
Post edited by faster100 on
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Comments

  • BlueMDPicker
    BlueMDPicker Posts: 7,569
    edited October 2004
    From previous post by F1Nut:

    14 Hz to 26 kHz Freq. Response
    4 Ohms Nominal Impedance
    92dB Efficiency
    10 to 500 WPC
    122dB Max. Output
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  • jdhdiggs
    jdhdiggs Posts: 4,305
    edited October 2004
    I would have swore that they were 5 or 6
    There is no genuine justice in any scheme of feeding and coddling the loafer whose only ponderable energies are devoted wholly to reproduction. Nine-tenths of the rights he bellows for are really privileges and he does nothing to deserve them. We not only acquired a vast population of morons, we have inculcated all morons, old or young, with the doctrine that the decent and industrious people of the country are bound to support them for all time.-Menkin
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  • dorokusai
    dorokusai Posts: 25,577
    edited October 2004
    4.
    CTC BBQ Amplifier, Sonic Frontiers Line3 Pre-Amplifier and Wadia 581 SACD player. Speakers? Always changing but for now, Mission Argonauts I picked up for $50 bucks, mint.
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  • RuSsMaN
    RuSsMaN Posts: 17,986
    edited October 2004
    Hit the terminals with your multimeter.
    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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  • Jstas
    Jstas Posts: 14,842
    edited October 2004
    I think the SDA 2* are 6 ohm models. My 2B's are but I don't know about the A's.
    Expert Moron Extraordinaire

    You're just jealous 'cause the voices don't talk to you!
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  • faster100
    faster100 Posts: 6,124
    edited October 2004
    never even thought about useing my volt meter, i just got a new one too...

    Thanks
    MY HT RIG:
    Sherwood p-965
    Sherwood sd871 dvd
    Rotel 1075 amp x5
    LSI15 mains
    LsiC center
    LSIfx surround backs
    Lsi7 side surrounds
    SVS pb12/plus2

    2 Channel Rig:

    nad 1020 Pre-amp
    Rotel 1080 stereo amp
    Polk sda 2B
    kenwood grunt Tuner
    realistic lab 450 TT
    Signal cable IC
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  • F1nut
    F1nut Posts: 50,734
    edited October 2004
    What, you didn't like the first answer???

    4 Ohms Nominal Impedance
    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 t-u-r-d by the clean end."

    President of Club Polk

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  • faster100
    faster100 Posts: 6,124
    edited October 2004
    No i loved them all.. LOL
    Just didnt think of testing with a meter.. love those specs and got a manual on its way to me.. waiting for a backordered sl2000 also...
    MY HT RIG:
    Sherwood p-965
    Sherwood sd871 dvd
    Rotel 1075 amp x5
    LSI15 mains
    LsiC center
    LSIfx surround backs
    Lsi7 side surrounds
    SVS pb12/plus2

    2 Channel Rig:

    nad 1020 Pre-amp
    Rotel 1080 stereo amp
    Polk sda 2B
    kenwood grunt Tuner
    realistic lab 450 TT
    Signal cable IC
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  • bbeacham
    bbeacham Posts: 141
    edited October 2004
    Doesn't a meter just measure resistence and not impedance?
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  • RuSsMaN
    RuSsMaN Posts: 17,986
    edited October 2004
    Originally posted by bbeacham
    Doesn't a meter just measure resistence and not impedance?

    Man, I might have to use that for my new signature line.

    That's AWESOME!!!

    Cheers,
    Russ
    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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  • Emlyn
    Emlyn Posts: 4,535
    edited October 2004
    Originally posted by Jstas
    I think the SDA 2* are 6 ohm models. My 2B's are but I don't know about the A's.

    The 2As were rated as 5 ohm.
    Originally posted by bbeacham
    Doesn't a meter just measure resistence and not impedance?

    Ammeters measure current, voltmeters measure voltage, and ohmmeters measure resistance (impedance). These devices are often combined into one instrument called a multimeter or VOM.

    Please see Herr Ohm for more information...
    ohm.jpg 30.9K
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  • bbeacham
    bbeacham Posts: 141
    edited October 2004
    I certainly am not an electrical engieer so this might be completely wrong but I thought that I have heard in the past that resistance/impedance are two differant entities.

    I thought that resistance is a DC value and is fixed; i.e. it will always equal 4 ohms and can be measured with a meter, multi or single purpose.

    On the other hand, I thought impedance is an AC value and will vary with the frequency of the signal. This cannot be measured with a meter but needs to be calculated with calculus.

    If that is true then while it is possible that the resistance value measured with a meter could be similar to the impedance, there is no guarantee that they be the same.

    So putting a meter across the speaker terminals would not necessarliy give the speaker impedance but, rather, the DC resistance.
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  • Tour2ma
    Tour2ma Posts: 10,177
    edited October 2004
    Resistance is indeed a "fixed" value (or relatively so), but it is not a term exclusively used for either AC or DC current. For example, Power companies are deeply concerned with the resisitance of the high voltage lines they use to distribute the AC juice they make.

    I believe the same is true for impedance as far as the exclusivity of the term. On the other hand...

    Yes, a static, reading of a speaker does yield an ohm value that is not going to be the reading attained during play. Several variables, including frequency, do determine a speakers "active" impedance (others include operating tempeerature, as voice coils do heat up during play). All speaker spec's include "nominal" impedances just for this reason.

    Now, how the "nominal impedance" spec is determined is an interesting question. Static? Driven at a given voltage potential for a specific frequency (ala efficiency/ sensitivity)? Industry standard?
    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

    "Death doesn't come with a Uhaul." - Dennis Gardner
    "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
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