The Impedance question of speaker from a total noob!

Discussion in 'General Electronics Chat' started by Krazyk, Aug 11, 2019.

  1. Krazyk

    Thread Starter New Member

    Aug 11, 2019
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    Small amount? Like only perceivable to a very well tuned ear small? I'm just getting started in diy speaker building Audioguru so I'm trying to mimic a sponge the best I can and soak everything up. It is a ton of information though!!! I'm also kind of flying blind because I don't own a computer therefore no CAD or testing ability for me. I guess you could say I'm doing it old school??. Anyways it's great to hear from a audiophile I was beginning to think there wasn't any around these parts. I just completed my first build and I'm proud to say it's all me. My design and my ability. It's definitely not a kit to say the least! So I feel pretty good about the quality I have achieved even without seeing it on a graph. All that being said it would be kind to even call me a hobbyist at this point and I'm also far from an audiophile. I am a proud and unapologetic Basshead, but with that being said I do not disregard overall audio quality. I just like my music seasoned a little different than some do. Hope to hear from you again soon and thanks for sharing the information. Here is my rookie build. I still gotta slap a little lipstick on the old pig but she sounds good to me and I guess that's all that matters in the long run. Plus I learned A LOT from trial and error. One thing I definitely learned is not to use car audio components! I mean there is nothing wrong with them at all. This sounds amazing with over half car audio components in it, but I could have accomplished more for less $ by going in a different direction. Lesson learned..... Hopefully I gain enough knowledge to be capable of doing my dream build someday the driver for it is the thumbnail. I want to put that in a MLTL enclosure! It will be a huge enclosure but I can't imagine the sound that will come from it!!
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    Last edited: Aug 13, 2019
  2. Audioguru

    Expert

    Dec 20, 2007
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    Two speakers side-to-side like you show produce a bad concentration of sounds straight ahead because if you listen a little at one side then the distances are different and the phase of some frequencies causes sound cancellation.

    Two speakers above and below like you show produce a bad concentration of sounds straight ahead because if you listen a little above or below then the distances are different and the phase of some frequencies cause sound cancellation.

    Why use multiple speakers? A single speaker produces even sounds to the sides and above and below for its range of frequencies. Your speakers look like they are little woofers for mid-low frequencies. Poor at very low frequencies and poor at high frequencies.

    A single speaker does a poor job of producing all frequencies. If it produces low frequencies well then it will shriek at mid-high frequencies but not produce very high audio frequencies. If it produces high frequencies well then it is fragile and low frequencies will destroy it.

    A good speaker system has a woofer for low frequencies, a tweeter for high frequencies and a crossover network or circuit. Sometimes a midrange speaker is added.

    You do not need a huge enclosure if you select a woofer that performs well in the enclosure type and size that its manufacturer recommends.
     
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  3. Krazyk

    Thread Starter New Member

    Aug 11, 2019
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    Thanks for your input. As I said I am fairly intelligent but new to this. This was not built as a hifi application. It was built as a portable party box and it accomplishes it's purpose extremely well. The bottom speaker is a 8 inch bass reflex Sub. And it performs admirably in the lower frequencies. The two middle speakers are indeed midbass drivers each are located in their own .25ft³ sealed enclosure. They are highly efficient and effective from 60hz all the way to about 4000hz. The top is a cheap supposed midbass that is handling the highs along with some vintage 5in highs I had lying around. This setup is not ideal and I never said it was, but it serves it's intended purpose. But once again thanks for your condescending comment I won't let it happen again.
     
  4. crutschow

    Expert

    Mar 14, 2008
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    You should not connect midrange and subwoofer speakers in series.
    They should be connected in parallel with proper crossover networks.
     
  5. Krazyk

    Thread Starter New Member

    Aug 11, 2019
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    The sub has its own circuit
     
  6. crutschow

    Expert

    Mar 14, 2008
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    That does not affect what I said.
     
  7. Audioguru

    Expert

    Dec 20, 2007
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    Every party I have attended (even portable parties in parks) used a proper hifi sound system. The little sound system I made for the beach was also hifi.
    The speakers were not in series so the damping factor was perfect. The speakers were not side-by-side nor one above the other for wide directionality. The woofers did not shriek their mid-high "cone breakup frequency" because a crossover circuit and good tweeters played good high frequencies.
     
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