Who fabricates 8 Ohms speakers...? I can't find other except Sony...

Discussion in 'Audio Equipment' started by Faustino Dina, Jul 17, 2003.

  1. Hi,

    I found good sales prices for Yamaha and Onkyo speakers, but it appear all
    to have 6 Ohm impedance and I want to buy an AVR which specifies 8-16 Ohm
    impedance. So which speaker fabricants have 8 Ohm speakers...? There is
    something wrong with 8 Ohms speakers that it looks to be less than 8 Ohm
    ones...?

    Thanks in advance
    Faustino
     
    Faustino Dina, Jul 17, 2003
    #1
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  2. Faustino Dina

    Neil Guest

    I also wouldn't worry over 6 vs. 8 ohm. Shouldn't be a problem.

    (BTW, the loudspeaker specs from manufacturers are often inaccurate,
    and impedance will vary with frequencies also.)
    Agree, unless the receiver manual states otherwise.

    If I was using really low-impedance speakers (such as 2 ohms), I'd put
    my hand on top of the receiver and make sure it's not getting too hot
    and is well ventilated, especially when the receiver is turned up to
    loud volume.
    Almost all consumer speakers are specified as 8 ohms. See comments
    above.
     
    Neil, Jul 17, 2003
    #2
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  3. Not necessarily. If the unit is adequate for the speakers attached
    and you do not have plans to change them with this particular
    receiver, then an 8ohm-only receiver is OK. What the lack of a 4ohm
    rating or application indicates is an inability to deliver power into
    a lower impedance load usually as a result of cheaper power supplies
    and output stages. Simply, you have to pay more to get more.

    Kal
     
    Kalman Rubinson, Jul 17, 2003
    #3
  4. So you do not recommend a receiver who only drives 8 Ohm speakers...I'm
    right?
     
    Faustino Dina, Jul 17, 2003
    #4
  5. I also wouldn't worry over 6 vs. 8 ohm. Shouldn't be a problem.
    The receiver is a Sony STR-DE685, the manual doesn't says anything about
    speaker impedance except in the rear view of the receiver where is a label
    below the speaker connectors that says to use 8-16 Ohms speakers.
    So can I trust the 6 Ohm speakers will not melt my receiver as long as I
    don't turn it too loud ? (Is anybody ready to put his sign under this... ;-)
    ?
     
    Faustino Dina, Jul 17, 2003
    #5
  6. Faustino Dina

    Shrivel Guest

    Yeah... what he said... ;-)

    In all seriousness, if I were serious about sound quality and assuming I
    could afford something more than the cheapest receivers, I'd spend a little
    more and get a receiver that was rated at a minimum of 4 ohms, and insure
    that pretty much any except the most demanding speakers could be driven
    without clipping or burning up the receiver. But that's just me and we may
    not have the same pocketbooks or desires...

    I'm also not a huge fan of most Sony stuff either, but that's only because
    I've simply been burned by Sony equiptment too many times in the past and
    I've learned my lesson.

    If you're just getting into home theater, I'm sure whatever you choose will
    be a treat. Enjoy it and don't worry too much about the 6 and 8 ohm
    difference.
     
    Shrivel, Jul 18, 2003
    #6
  7. Faustino Dina

    GregS Guest

    If its rated 6 ohms then its rated 6 ohms nominal. Its what the manufacturer came up with.
    Many speakers are rated at the MINIMUM impedance, not always nominal.
    When I make a speaker, the impedance is essentialy the measured DC resistance.
    Unless I buy some of those Pioneer 6 ohm drivers, then its impossible for me to go
    lower than 8 ohms unless I go down to 4.

    greg
     
    GregS, Jul 18, 2003
    #7
  8. I've simply been burned by Sony equiptment too many times in the past and
    What do you mean when say "burned"...? Sorry, my english is not good enought
    for tasting this phrase, I'm taking it literally.... ;-)
    I'm new to HiFi, then I'm looking for cheap, entry level, equipment, for
    training my ears. I'm aiming to the home cinema package from Sony because it
    includes speakers, subwoofer and receiver for the price of one receiver of
    another HiFi firms (ok, it's looking the Mexican market where prices are two
    or three times the USA --where is the globalization? ). But I'm looking also
    for two good speakers for stereo playing. I don't trust the small speakers
    that comes with the home-cinema pack....
     
    Faustino Dina, Jul 18, 2003
    #8
  9. Faustino Dina

    Neil Guest

    Then speakers of 8-16 ohms should be fine, and I also think that 6
    ohms is close enough to be OK and not cause your receiver to overheat.
    You ahould make sure your receiver is well ventilated, no matter what
    speakers you use. There should be at least a few inches of space above
    your receiver so that air can circulate and the receiver doesn't
    overheat.

    BTW, Consumer Reports magazine (www.consumerreports.org) tests reviews
    receivers. CR tests whether receiver will perform acceptably at 4, 8,
    and 16 ohms. Last November, CR printed a review that includes your
    receiver. CR recommended against using 4 ohm speakers with almost all
    the receivers tested, including yours. So just in case you ever are
    considering 4 ohm speakers, you probably shouldn't use those.
    I think you'll be OK. But when you start using the 6 ohm speakers,
    just put your hand on top of the receiver occasionally and make sure
    the receiver doesn't feel hot. (It's normal for a receiver or amp to
    feel warm, but if it feels hot, that's a sign of trouble.)

    Also, just out of curiousity, I wonder if your Sony receiver has a
    built-in cooling fan? That can also help, although the fan may
    contribute some noise. Modern Dolby receivers have so many amps and
    electronics built in that some of these receivers now include fans to
    help cool the receiver.

    (BTW, many years ago when I didn't know better, I once installed a
    reciever in some bookshelves and put one bookshelf right on top of a
    receiver, blocking the receiver's cooling vents. Eventually the
    receiver failed and required service, the technician told me the
    receiver had overheated, he repaired it, and I learned my lesson about
    making sure receivers and amps get enough ventilation. Another BTW:
    that happened 25-30 years ago, and thanks to luck and ventilation,
    that receiver is still working now.)
     
    Neil, Jul 18, 2003
    #9
  10. I travel all throughout Mexico frequently, and I am amazed on how
    expensive
    My first I suspect is the government. Mexico is well known to be a country
    with a lot of tax evasion. Then the gov raises the taxes so we, the one few
    good citicens, pay the taxes they are unable to collect...

    But I also found that internet sellers in USA don't want to export many
    items, specially HiFi audio equipment. I read in some sites it's 'cause the
    manufacturer doesn't permits to do so. Adding that the market for HiFi in
    Mexico is inherently weaker than in developed countries, then it is hard to
    find well stocked distributors....So where is the world markets?, where is
    the globalization...? Sony has a solid presence in Mexico, I can buy
    directly from him and make valid my guarantee on many places across the
    country, but others HiFi firms are accesible only through not so convincent
    dealers....
     
    Faustino Dina, Jul 18, 2003
    #10
  11. Faustino Dina

    Shrivel Guest

    I mean that in my years of buying audio and video equipment, the Sony stuff
    has ALWAYS proven to be the least reliable. I've had ONE single piece of
    Sony stuff that did not die prematurely and that is my Sony EP9ES surround
    processor and I attribute it's longevity to the fact that it's an "ES"
    component, which means it's built by an entirely different division of Sony.
    The other stuff that has broken:

    2 car stereo head units
    1 Laserdisc player
    1 CD player
    1 receiver


    I can only think of ONE SINGLE piece of A/V equipment that was not Sony
    branded that has broken on me in all those years and that is an NEC
    integrated amplifier.

    Needless to say, I don't buy Sony anymore, although I never really had any
    complaints about the sound or video with any of the products. The lack of
    reliability was the problem.
     
    Shrivel, Jul 19, 2003
    #11
  12. Faustino Dina

    Geoff Wood Guest

    Zillions of companies make speakers that would suite. 6 ohms should not be a
    problem - 8Ohms is a pretty nominal figure at the best of times.

    Other brands - try looking in a hifi shop rather than a department store.


    geoff
     
    Geoff Wood, Jul 19, 2003
    #12
  13. Faustino Dina

    Geoff Wood Guest

    You talking impedence or resistance ?


    geoff
     
    Geoff Wood, Jul 19, 2003
    #13
  14. Faustino Dina

    Geoff Wood Guest

    Just don't get anything with silver plastic on the cabinet !

    ;-)


    geoff
     
    Geoff Wood, Jul 19, 2003
    #14
  15. 2 car stereo head units
    ....yeah, it's really a very convincent list, I was understanding the word
    "burned" correctly... :-(
    Thanks for your advice, I'll consider my decision...
     
    Faustino Dina, Jul 19, 2003
    #15
  16. Faustino Dina

    Leadfoot Guest


    I ran a Sony @100WPC STR-DE575 running 4 ohm Cerwin-Vega RE-30's for at
    least 6 months. Mostly I used them for Home theather and some music and
    rarely cranked them I recently upgraded to a Yamaha RX-V630 that while
    rated @80WPC is much louder than the Sony. Part of the reason for the
    upgrade to the Yamaha was the 4 ohm/8 ohm switch.

    I don't think the 6 ohm speaker will pose a problem so long as you don't
    crank up the volume for LONG periods of time and you make sure the Sony's
    air vents are kept open. If you have a situation where you do want to crank
    the volume for long periods of time you could place a fan near the air vents
    to keep the air in the receiver circulating.
     
    Leadfoot, Jul 20, 2003
    #16
  17. Faustino Dina

    ST Guest

    The Amplifier failing is the lest of your problems, since the speakers are
    being grossly underpowered it will cause the amp to clip, especially when
    producing loud (dynamic) bursts.

    You will eventually damage the speakers!

    NOT leaving the amp running for long durations and cooling it is a waste of
    time. The amp will not be damaged but again, your speakers will.
     
    ST, Jul 22, 2003
    #17
  18. Faustino Dina

    spironical Guest

    Every year or two CU tests popular speakers, and while most speakers
    claim to be 8 ohms, CU finds most to measure 4 ohms. Although CU's
    opinions should to be taken with a grain of salt, measurements are
    measurments, and not opinions.
     
    spironical, Dec 13, 2004
    #18
  19. Faustino Dina

    R Guest

    wrote in @c13g2000cwb.googlegroups.com:
    CU is as a disreputable source as I can think of bar none. I would take
    anything they say with several large truckloads of salt and a shovel. The
    shovel is to dig out from under all the manure they dump on the reader.

    r
     
    R, Dec 14, 2004
    #19
  20. Faustino Dina

    TonyP Guest

    The good thing about speaker impedance is that you can quote almost any
    figure you like, and be able to back it up with measurements. Unfortunately
    the frequency at which that figure applies is never quoted.

    CU are probably right if they are talking about minimum impedance, however
    the only *useful* measurement is an impedance Vs frequency graph, then you
    can decide for yourself what is relevant.

    TonyP.
     
    TonyP, Dec 14, 2004
    #20
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