SubEQ HT vs MultEQ XT32

Is there a difference between these two features and if so what are they? I see some AVR's offer both of them so I am trying to sort out if you have XT32 why you would need SubEQ HT.

 

Example, the Integra 70.3 doesn't list SubEQ HT as a feature but the Integra 70.2 does.  Is one going to be different in regards to how it treats multiple subs?

Thanks

Bill

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56 Comments

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    Pierre

    Chris, I was wondering if you could (or let someone) update the "product catalog".

    I am missing the new Onkyo 818 in the list which comes with MultEQ XT32. I was wondering if it really supports two subwoofers individually or if the model is using a y-cord. (I guess I am asking if it offers SubEQ)

    Thank you,

    Pierre.

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    Jay Kopp

     "Hi Jay, this is already available from Audyssey. However no AVR maker has yet allowed control of 4 independent subs."

    July 10, 2012 07:23 am

    Hi Chris,  It would be nice if you guys can offer a stand alone SubEq box with 4 or more sub outs.   I think Harman has a product like that.

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    Audyssey Labs

    Hi Markus,

    Yes, that is what we found in our experiments.  Aligning delays and levels first and then pinging the subs together consistently produced a smoother response.  The objectives of the equalization strategy are a combination of all the factors you list using a (proprietary) weighting.

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    Audyssey Labs

    So far only AVRs with XT32 have incorporated Sub EQ HT, but it's not a requirement.  Any AVR maker that wants to add the Sub EQ HT functionality can do it.

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    Audyssey Labs

    The 5010 will support SubEQ HT

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    Jay Kopp

    Wow.  Thanks.

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    Garrett Oostdyk

    I am designing a theater for a customer with existing power amps.  It seems that SubEQ HT and XT32 are only available on receivers.  Is that correct?  As we will use 2-3-or 4 subs we are looking for help in the lower frequencies.  We are looking at the Marantz AV7005.  We would do a Pro calibration.  Are the XT32 and SubEQ HT only part of a Pro calibration?  Thanks,  Garrett

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    MrFattBill

    So just because an AVR has XT32 doesn't necesarily mean it HAS SubEQ HT?

    Bill

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    John Wall

    Thanks Chris for the quick response. 

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    Randy Parker

    I bought Integra's DTR 80.3 to get SubEq for my two subwoofers.  Each subwoofer contains two 18" Fi woofers in an infinite baffle design mounted in the basement with openings cut out in the rear corners of the listening room behind the front left and right main speakers.   I expect the SubEq will ensure proper subwoofer delay/phase integration with the main speakers as well as with each other.  Correct?  However, I am just as interested in the equalization capabilities of SubEq.  The whole reason for going to such extreme subwoofers is to obtain (and I get) amazing output below 20 Hz.  What are the SubEq equalization capabilities below 20 Hz? I have plenty of amplifier power to handle boost at these frequencies.

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    Rfeemster

    So, someone with a stand-alone Sub EQ in their existing system with a MultEQ product could make a viable upgrade to xt32 with SubEQ HT with the Onkyo TX-NR818 (or similar xt32/non-SubEQ HT product), true?

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    Audyssey Labs

    Correct.

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    Audyssey Labs

    Hi John, yes this is the info we have.

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    Audyssey Labs

    Hi Markus,

    The data is all on our measurement computer, but we have not published it yet.  Perhaps it would make a good AES paper one day... I am attaching one example from the data taken in one of our listening rooms.

    As you can see, the pink curve (SubEQ HT method) is smoother than the light blue curve (individual EQ for each sub).

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    Audyssey Labs

    @Garrett: XT32 and SubEQ HT are also available in preamps.  For example, Integra DHC-80.3 and Onkyo PR-SC5508.  Product catalog is available here.

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    EJ Navarro

    Thanks Chris, I find it very refreshing how you take time out of your day to answer these sometimes mundane questions.  It's nice being able to dialog with the founder and CTO of the company.

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    John Wall

    G'day Chris,

    Onkyo have released the 1010, 3010, 5010. None of their literature mention subeq HT. Can let me know if any of these products have the subeq Ht?

    Thanks.

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    Markus

    Thanks but I'm not sure what the data shows. Is it a single point or spatial average? What is "Mix Calb 2 Subs" and "2 individual Subs"?

    The frequency response looks already pretty smooth - is this a rather large room or is the data smoothed (or both)?

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    Audyssey Labs

    @Randy: yes, the upgrade would give you the benefit of 32x higher resolution in the speaker filters and the same functionality as the separate SubEQ processor.

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    john chappie

    Chris my denon 3312ci has 2 sub outs but only mutilEQ XT , will I need an external eq to use 2subs?

    Both subs are Klipsch RW-12d

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    Jay Kopp

    Chris,  I noticed Onkyo 5010 has 4 sub outs. Does this mean that the SubEq measures 4 subs independently?  Jay

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    Audyssey Labs

    Hi Randy,

    Yes, the SubEQ HT function in the 80.3 will measure each sub individually first to determine any level and distance (phase) differences between them.  It will apply these corrections and then measure them together as "one" sub to apply the room correction filter.

    It is MultEQ that is in charge of creating the filters and it will look all the way down to 10 Hz.  If it finds usable response down there then it will apply correction down to 10 Hz.  

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    Markus

    I thought that they are treated "as one" anyway (after delay and level has been set by Sub EQ HT)?

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    Audyssey Labs

    Hi John, you don't need an external EQ for the subs.  Just set them up to be at the same level and as close to the same distance as possible and then y-cord out to them from the Sub Out of the 3312.

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    Jay Kopp

    Thanks Chris.  Is it something that will end up in future versions of Audussey technologies?

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    Audyssey Labs

    Hi Markus, do you really think I would post any data that was single point! Ha!

    This is multipoint data that is spatially averaged in a mid-size listening room.  It is 1/6th octave smoothed.

    Mix Calb 2 Subs MEQ Off = two subs acoustically summed with no delay correction between them.    This is the "before"case for the pink curve

    2 individual Subs MEQ Off = two subs measured individually and then summed.  This is the "before"case for the light blue curve

    The point is that equalizing each sub separately and then summing them (light blue curve) is not as flat as summing them (with delay and level compensation) and then equalizing the sub (pink curve).

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    Audyssey Labs

    Yes, that's correct if the AVR has SubEQ HT

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    MrFattBill

    Thank for the quick respone.

    So just because an AVR has MultiEQ XT32 doesn't mean it has SubEQ HT BUT if its has SubEQ HT it has to have XT32? Further more of you have 2 subs you would want SubEQ HT because it handles them differently then just MultiEQ XT32 on its own?

    Bill

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    john chappie

    Thx for all the help Chris

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    EJ Navarro

    Hey Chris,
    If you look at the back panels of the 1010,3010 and 5010 they label the sub outs SW1 and SW2 which would lead one to believe that all would have SubEQ HT. This is a pure guess on my part but if you look at the back panel of 818 which doesn't have SubEQ HT it labels the two subouts as just subwoofer.

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