K1LL3M
Registered: 10/26/09
Posts: 39
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| | 08/03/10 at 07:10 AM | Reply with quote | #21 |
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Quote: I would also recommend JBL Bass-Q for those having multiple subs at different room locations especially if they're not placed eqi-distant from the listening position. I've seen it in action and heard the end-result hands-on compared to both Audissey Pro and even ARC-1 and the end result was pretty amazing actually. Have not used it in my own place though
I was looking at these myself, interested to hear more on it compared to (and with)Audyssey.
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boothman
Registered: 08/05/10
Posts: 1
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| | 08/05/10 at 06:01 PM | Reply with quote | #22 |
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I'm using Rane PE-17 5 band parametric EQ's for subwoofers.
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audioguy
Registered: 05/24/09
Posts: 139
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| | 08/22/10 at 08:45 PM | Reply with quote | #23 |
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Sub Placement, EQ and distance differences
Both the Harmon Papers and Geddes strategies recommend various sub placements for positioning multiple subs to achieve the most linear frequency response. In either of those two approaches (particularly Geddes), it will be likely that one or more of the subs will NOT be the same distance from the main LP as another sub. In fact, you could end up, in a four sub room, with all four subs different distances from the main LP.
While I understand the approach of EQing all subs as one is the preferable method, the Audyssey SubEQ provides the ability to deal with subs where two of them are different distances from the main LP. Products like the QSC DSP 30 also provide that capability. In my case, when (using the DSP 30) i delayed the rear subs to match the distance of my front subs, the un-EQ'd FR got slightly worse.
So my question is: How important is it to compensate for distance differences when dealing with multiple subs that are placed in such a way that they are different distances from the main LP. And I ask this not from some theoretical position but rather sonically ---- can you hear it?.
Anyone reading this using multiple subs where the distance to the LP is not the same, you have EQ'd them but have not compensated for the distance differences electronically?
Edit: Intellectually, I can not imagine how a distance difference of, for example, one foot, between two subs can make any kind of audible or tactile difference given the wave length of an 80Hz tone is about 14 feet --- but what do I know??
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KenWu
Registered: 06/23/09
Posts: 54
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| | 08/22/10 at 10:57 PM | Reply with quote | #24 |
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"Should I feel comfortable after all the work of multi-sub placement and manipulation of distance/phase settings has been done to achieve the best possible FR in the main listening position?"
Yes, I guess.
But for the known FR anomalies for the other (crappy) seats I can't help but feel weak..
Right now I have a SMS-1 and a borrowed Antimode 8033. The distance/phase settings and the inherent electronical delays have been manipulated without being totally faithful to keep the main LP as well as other seats favorable.. should I feel fine?
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gpburns
Registered: 07/18/09
Posts: 46
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| | 08/30/10 at 10:18 PM | Reply with quote | #25 |
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The upcoming pre/pros with Audyssey MultiEQ XT32 and Sub EQ HT are looking pretty sweet. The built in Sub HT caught my eye for dual subs– basically same resolution/features as their sub Equalizer without having to have the extra unit and being able to use balanced connections. Will ping each sub individually and then together for final corrections. |
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TheLion
Registered: 12/04/09
Posts: 32
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| | 08/31/10 at 05:05 AM | Reply with quote | #26 |
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I heard about this as well. Do you know which units support this "Sub EQ HT" procedure?
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gpburns
Registered: 07/18/09
Posts: 46
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| | 08/31/10 at 05:50 AM | Reply with quote | #27 |
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I think the only unit on market now is the Onkyo Nr3008 AVR
with most coming out this fall. I'm interested in seeing if the Integra 80.2 will
have this feature
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gpburns
Registered: 07/18/09
Posts: 46
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audioguy
Registered: 05/24/09
Posts: 139
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| | 09/06/10 at 09:40 AM | Reply with quote | #29 |
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But I could not find specific products that were announced or released that had this technology (other than the one previously mentioned)
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Stereodude
Registered: 06/06/07
Posts: 213
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| | 09/06/10 at 10:31 AM | Reply with quote | #30 |
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The Denon A-100 and 4311 have it. Presumably the Integra 80.2 will have XT32 as well since the Onkyo Pro 5508 has it. The Marantz AV7005 and SR7005 do NOT have it.
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