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Thread: Does digital room correction and equalization make all speakers sound the same?

  1. #1

    Does digital room correction and equalization make all speakers sound the same?

    An evaluation of ten different speakers of ten different brands, with and without Dirac Live, by a panel of three different trained listeners is in progress here:

    Warning: My posts may be biased even if in good faith, I work for Dirac Research :-)

  2. #2
    [WBF Founding Member] Addicted to Best! JackD201's Avatar
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    Nope There's more to it than FR at a mic's position. No doubt DRC can help, just not THAT much.
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    Jack just nailed it!

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    Addicted to Best! YashN's Avatar
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    No, won't happen because music reproduction and SQ don't rely solely on the Frequency Response profile.

    They rely a lot also on how transients, especially attack transients are reproduced. EQ cannot correct deficiencies there (but can introduce more). Furthermore, how attack transients are reproduced are also a function of the hardware limitations in the speaker sets.

    I'd also strongly recommend people work on organic, acoustic isolation rather than head for DSP processing straight away.
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    Member Sponsor [WBF Founding Member] Mike Lavigne's Avatar
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    maybe it will make those speakers sound the same....

    but how 10 sets of likely decent bang-for-the-buck, but none-the-less mid fi, speakers and electronics sound is just not telling us much about anything.

    no one pushing for ultimate sound is getting near that gear. but as a way to make particular price points a step better (or less confused) this is relevant. you are more likely to find 'gross' levels of challenging room conditions with more entry level gear and systems. and it might be more cost efficient to throw DRC at these situations than higher cost gear.
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    VIP/Donor [VIP/Donor] microstrip's Avatar
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    The few spectra shown without Dirac evidence a general wide prominent large peak excess of 10-15 dB between 100 and 200 Hz - probably due to room interaction. Such excess will probably affect speaker performance significantly - in such poor circumstances I can easily admit that Dirac can improve sound quality.
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    Addicted to Best! Rodney Gold's Avatar
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    considering that DRC generally works on a target curve that is taste inspired .. no .....even if you use the same target curve on different speakers , their flavour comes thru anyway.
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    A study that I put on my forum concluded that the thing that makes speakers most desirable for most people is have great off-axis response as well as flat frequency response. Different speakers behave differently depending on their placement and toe-in. Optimizing one and putting another in its place will likely not be optimum for the second one. Polar responses vary as back-waves are different. Diffraction due to cabinet shape is also an issue making one different from another. Crossover points and the quality of crossover components (inductors, caps, resistors) will make a huge difference in the SQ. Another thing is dynamic response. None of these things are addressed by room/speaker correction. It's useful IMO to eliminate bad room resonances, but there are other equally effective ways to do this, such as aiming the listener into a corner.

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  9. #9
    Member Addicted to Best! NorthStar's Avatar
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    Quote Originally Posted by Flak View Post
    An evaluation of ten different speakers of ten different brands, with and without Dirac Live, by a panel of three different trained listeners is in progress here:

    Hey cool link there; I recognize few distributors/contributors/sellers/posters.

    Timbre matching is obviously best performed by having identical speakers all around. If absolutely impossible, THX over imposed with Dirac Live could be an alternative. Not 100% sure though.

    We all know that each loudspeaker's position produce a different acoustic sound.
    And what we hear @ the main listening sweet spot is relative to those speaker's position in that acoustic environment. Other listening positions have variable bass content and high frequencies' differentiations.

    EQ is also time arrival from each speaker @ the listener(s) ears on cue (equal time) and coherence.
    Can Dirac Live do that? That's the goal.

    I've read some from some other sites, regarding Dirac Live implementation in some of them audio products that espoused it. ...With more or less success.

    Different mid-range and tweeter drivers have different sound properties, characteristics, acoustical propagation. Can magic make them sound equally the same? If DSP can do that then the future might look just a little brighter. Short of that we simply buy eleven the same speakers (7.1.4) ... maybe not the ones on/in the ceiling. ...Not if the seven ones @ ear level are from the full range tower variety. And then we let the magic of DSP performs its stuff; EQuing in time and frequency domain in tandem with room's filters.

    I just had a brief look to your link...I will observe the rest of it; you never know...they probably omitted important parameters in that Dirac Live comparison business analysis.

    Good question and good link sharing Flavio. I'm looking forward to learn more, with good exchanges and common sharing. It's good to be biased, that way we know we are not perfect.


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    Last edited by NorthStar; 11-06-2017 at 03:26 PM.
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    Addicted to Best! Pb Blimp's Avatar
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    Said differently, two speakers that measure extremely flat in anechoic chamber can sound, image and engage very differently from each other (even very expensive speakers) for many of the reasons stated.

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