Home Theater and Stereo Room Equalization – Parametric EQ Edition

Home Theater and Stereo Room Equalization – Parametric EQ Edition

Looking to learn more about Room Equalization and Room Correction and how it works? Whether you are manually tuning it via one of our processors’ built in Parametric EQ settings, with a dedicated RTA, or with the free software of REW Room EQ Wizard, the principals remain the same when adjusting the main settings to dial in your Dolby Atmos & DTS:X home theater or your dedicated 2-channel stereo system.

Our very own Lonnie Vaughn is here to help break down the science behind what is happening and the traps that many people fall into.

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Categories: Home Theater

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  1. WALLY Lafferty
    WALLY Lafferty 13 May, 2022, 12:15

    That was fascinating. Thanks.

    Reply this comment
  2. Kenneth Netto
    Kenneth Netto 13 May, 2022, 12:15

    Well explained and very informative. Thanks for sharing.

    Reply this comment
  3. Novilicious
    Novilicious 13 May, 2022, 12:15

    This was so helpful. Thank you so much for this advice about less is more

    Reply this comment
  4. John Cox
    John Cox 13 May, 2022, 12:15

    How did you determine it was 1/2 an octave?

    Reply this comment
  5. matt giunta
    matt giunta 13 May, 2022, 12:15

    Thanks for most helpful video on YouTube.Ive had Yamaha receivers for many years that include a Parametric equalizer and I always tried for a flat response and was underwhelmed. I used your concepts on my home theater and less is more has made a major difference in my sound quality. You are a great teacher.

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  6. Boyd Rijk, van
    Boyd Rijk, van 13 May, 2022, 12:15

    After many years in the hobby, I have arrived at exactly the same thoughts on equalization, but you have presented this in an easy, clear and concise way. Thanks for the great video!

    Reply this comment
  7. David Lewis
    David Lewis 13 May, 2022, 12:15

    Awesome video.💯
    I'm getting back into Home Theater love to have great sound. With strong bass. I was born in Hawkins county Tennessee now I live in North Carolina once I found out your company was in Tennessee I was at awe. I'm in need of a powerful subwoofer. Like the RS13 now I'd say it's a Beast.

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  8. Andy Summers THX Cinema and my Cats
    Andy Summers THX Cinema and my Cats 13 May, 2022, 12:15

    I agree to disagree that is the eq question.
    I run a sweep on an amplifier it either shows on the graph of the direct electronic on the REW, with roll off on the low end then shows flat as at 20Hz all way to 20KHz or may have roll off starting at 2KHz and rolls off at -6dB slope.
    I run a sweep on the speaker close up it is all bumping, peaks and dips not so much but just doesn't look flat and mostly not the passive crossover issue, thou I only passive with surround speakers and DSP crossover with front L Lc C Rc R and subs only. I still see a bumpy frequency between measuring the five screen speakers to the subs and the surrounds and I apply. 1/3 oct eq or PEQ to where it will be useful.
    The frequency on the amplifier will be altered it won't be flat response anymore due to PEQ filters. Would be better if the passive crossover can have lots of filters to make the response on the loudspeaker flat.

    If a movie or music is played thou music is movies it may sound too loud at certain frequencies vs how it sounded felt at a THX cinema where bass was pressing against my, body or someone else? ..and a lot more besides that.

    Placing the loudspeaker matched LCR subs and surrounds, outdoors in the garden for frequency REW sweep testing to see what the graphs show vs indoors when the loudspeakers are placed indoors will show different. The room needs specific treatments or room needs to be altered drastically cos the wall and ceiling boundaries are going to alter that loudspeaker surrounds and sub bass, cos vs the outdoors the wavelength of the frequencies go from mm to inches to many feet to many hundreds to infer-sonic thousands of feet and the outdoors has less boundaries expect depending on how close the loudspeakers subs are placed to the ground surface. Do the frequency sweep with speaker/sub near to ground boundary surface then repeat the sweep with speaker/sub hoisted up above the ground and the mic picks it up differently.

    The outdoors won't show much Nulls cos the frequency isn't rebounding back on itself due to ceiling floor and walls. Outdoors shows the opposite and sounds better thou outdoors isn't ideal for listening due to Noise-Floor, will be so loud making a movie or music having to be played many times more dB SPL and providing not sat near the speakers/subs be seated at certain distance vs the room, total opposite.
    The room the inside of the room is going to add Room Gain to the loudspeaker/subs so it's adding False to the loudspeaker/subs unless the speakers/subs are designed in a room and not using Anechoic Chamber, cos how many are going to design a room like a mini anechoic chamber with spring floor below with long wedge tiles below as well as on the sidewalls to ceiling. Hardly anyone is going to do that. You'd need a very Large room and the room will get smaller once finished, may still be large but those wedge fiberglass are often 2 to 4 feet in length vs typical room wedge foam treatment of few inches that can't handle bass due to the bass wavelength frequencies.

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  9. Xcell-GM
    Xcell-GM 13 May, 2022, 12:15

    Thanks for the presentation, much more informative then 95% of others I've watched. I recommended watching these to friends to get a good grasp on sound systems and how to set up the basic, or if your good at it, how to fine tune. Thanks again.

    Reply this comment
  10. Charles Middleton
    Charles Middleton 13 May, 2022, 12:15

    Great presentation! I was experiencing some mid-range harshness. Your video helped a lot. (Didn't know what the "Q" slider did.) Also, as a photographer it sounds like octaves are like "stops". In photography you can double the amount of light for an exposure, that's one stop. Or, you can reduce the amount by half, that's one stop as well.

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  11. Drivemark Ci
    Drivemark Ci 13 May, 2022, 12:15

    Great presentation! Thanks.

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  12. brystonfan
    brystonfan 13 May, 2022, 12:15

    I have been playing with the peq in the xmc-1 for 5 years, preset 1 is set up perfectly for movies and games and music, preset 2 is where I am constantly tweaking

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  13. Eric Franke
    Eric Franke 13 May, 2022, 12:15

    If we're talking about in-room measurements with an omnidirectional microphone, the high-frequency rolloff is actually caused by the sound power and not the direct sound. The sound power is lower because the tweeter is beaming and not loading the whole room as much. The mic is working properly but it is measuring the sum of all of the reflections. Wide dispersion speakers will not show as much of a drop.

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  14. Kevin Gardner
    Kevin Gardner 13 May, 2022, 12:15

    Lonnie, Thanks for all of your efforts. As you know, fix the dip(room node) – move the speaker or stuff in the room. I'm currently working on getting a used/borrowed laptop with HDMI output so I can run REW software to hopefully get my system up to par. I just wish I could input the EQ findings from REW into my Denon AVR591. Can we manually EQ Emotiva gear?

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  15. Kevin Gardner
    Kevin Gardner 13 May, 2022, 12:15

    Lonnie, as always, great info. Thank you. Hopefully you will talk about "house curves" in some EQ systems. Also, this gentleman backs up your opinions on room EQ:

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  16. Andrew Crain
    Andrew Crain 13 May, 2022, 12:15

    I have a few peace of Emotiva I have the A-300 and I also have the XPA 2 GEN 3 they are both fantastic amps and I don't use a EQ on my system I let the Equipment do the work and it sounds fantastic if I say so myself the XPA did it for my system…..great video I'm just a 2 channel guy

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    FULL HD MOVIES 13 May, 2022, 12:15

    Sir I want emotiva basx 800 amplifier

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