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Help with surrounds - Low cost, low distortion, and high sensitivity; $125 max

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  • Help with surrounds - Low cost, low distortion, and high sensitivity; $125 max

    Dirac Live Spatial Audio - absolutely awesome
    I am excited about the upcoming Onkyo flagship AVR and AVP. Dirac Live will be used and there will be bass management. I am looking further ahead at Dirac Spacial Sound (https://www.dirac.com/the-arrival-of...on-technology/), which uses loudspeaker co-optimization for room correction, reflecting a flattening out, a reduction in spatial variations, and cancellation of room resonances.

    Therefore I am beginning to care about the quality of my surrounds in home theater as they will all contribute to the sound from the mains.


    What I have considered:
    I am planning to modify the existing cabinet into a sloped baffle or a triangle shaped enclosure for easy mounting at the ceiling corners. I have already looked at the following:
    PartsExpress C-Note: Great value, good distortion but not near the sub crossover. Sensitivity is too low
    Zaph ZA14 + XT25: Sensitivity too low and the ZA14 will not be happy at all in the lower frequencies. More of a midrange than a midwoofer.
    SBAcoustics SB16PFCR25-4 coax: Great directivity and 90db sensitivity. Cheap and includes a crossover plan however I can find no distortion measurements and comments that the cone moving will destroy the tweeter response. More of a midrange I guess and not to be crossed at 80hz? Easiest to fit into a cabinet.
    SBAcoustics SB17: 90db sensitivity but I can't find XT25 tweeter designs or something to keep price down. Distortion below 150hz similar to the C-Note but with good sensitivity. Might be okay crossed at 80hz.
    Volt 8: Too heavy for a ceiling mount, not my cup of tea.

    What is a good loudspeaker with good sensitivity, distortion, and value that doesn't sacrifice much?

  • #2
    Hmmm, you may have stumbled upon another design constraint rule. Pick any two of those three.
    Don't listen to me - I have not sold any $150,000 speakers.

    Comment


    • #3
      You really don't need much capability from surrounds, because their program material isn't demanding. I use these, without tweeters, and they have no problem keeping up with my line array mains and horn loaded sub: https://www.parts-express.com/GRS-4F...80-02F-292-434
      www.billfitzmaurice.com
      www.billfitzmaurice.info/forum

      Comment


      • #4
        Try extruding this through your criteria filter. I built a pair of ported as 2.1 satellites, very pleased for about $100. Crossed at 80 with a Dayton 8" dsp sub. Desktop.

        https://techtalk.parts-express.com/f...0-8-easy-build

        https://www.parts-express.com/Dayton...-8-Ohm-295-384

        Comment


        • #5
          The Peerless TC8FD05-04 3" is inexpensive @ $10.23 and relatively efficient at 88.96 db, but unfortunately currently out of stock. Peerless offers several other small (2-1/2" - 4") inexpensive drivers with less efficiency which could be doubled up.

          Comment


          • mattk
            mattk commented
            Editing a comment
            I don't see that sensitivity in the specs

        • #6
          The problem with the CX-120 is not the quality but for my case the sensitivity. Seems like an excellent speaker for Dipole/Bipole surround speakers assuming that sensitivity will go up the same as a monopole. Measurements here: http://www.dibirama.altervista.org/l...coassiali.html

          The Peerless TC8 is good but will have very high distortion on the low end. The TC9 would be my go to if the low end is not a concern as a full-ranger.


          Right now I am leaning towards the Sica or SB 6.5" coax. Only 6" woofers seem to be sensitive enough and get to 80hz cleanly enough.

          Comment


          • #7
            Don't sweat getting to 80Hz. 100Hz is fine. I wouldn't be all that concerned about sensitivity either, surrounds don't need to go anywhere near as loud as the rest. My L/R have 12dB higher sensitivity than my surrounds with no ill effect.
            www.billfitzmaurice.com
            www.billfitzmaurice.info/forum

            Comment


            • #8
              Thanks Bill. In that case I will go with something smaller that looks better too.

              Comment


              • #9
                The Dolby Surround Mixing Manual specs the surround channel at 100-7kHz. It actually says large speakers for base and extended range tweeters for high frequencies are not needed.

                Comment


                • #10
                  Originally posted by devnull View Post
                  The Dolby Surround Mixing Manual specs the surround channel at 100-7kHz. It actually says large speakers for base and extended range tweeters for high frequencies are not needed.
                  DTS and AC-3 are, I believe, much wider bandwidth, however.
                  Don't listen to me - I have not sold any $150,000 speakers.

                  Comment


                  • #11
                    Dolby Atmos is full bandwidth on all ( ALL ) channels. Dolby pro logic II small surrounds are fine I guess. I just built full size 3 ways for my L and R surrounds with the same driver in my mains two 3' mids two 8' woofers and all I can say is wow your missing out if your surrounds aren't full range. And I have 3 18 inch subs also, it is a large room so space is my enemy.

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