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Old 01-18-2010, 02:18 PM   #1
tilallr1 tilallr1 is offline
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Default Audyssey - Calibration of Onkyo 705 with NOW SVS 7.2

Ok ... so I did a recalibration yesterday and everything does sound much ... much better with the sub moved near the left front wall. I guess no matter what you do Audyssey cannot fix a badly placed sub. Also, I took 6 measurements around my primary listening area instead of just 3.

Anyway, interestingly here is how the crossover setting on the Onkyo turned out:

Subwoofer - Yes
Fronts - Full Band *** Which I Manually Changed To 80Hz (THX)
Center - 150Hz
Surrounds - 100Hz
Rear Surrounds - 150Hz
2 Channel Rear - Yes
LFE - 80Hz (THX)

Now the surround sound and bass have a much cleaner and more encompassing feel.

Also, interestingly enough, the Sub volume went up to -6dB. It is also much more pronounced. But does not sound boomy. Although my door now rattles, which I will have to fix with weather strips, or leave it slightly open.

NOTE: After reading further I have discovered that the Receiver should be reading a range of +3dB to -3dB on the Sub. So I should be turning the gain down on my Sub until Audyssey sets my receiver somewhere in that range. So I guess another recalibration will be in order.

My major question is, why did Audyssey setup the crossovers so high on my center surrounds and rears? Although they sound great, am I now missing sound (.1 range) out of these speakers because of these settings?

I tried setting them all to 80Hz (THX), but they didn't sound as good. I assume it has to do with the bass dynamics of my room. But I don't understand why.

Any insight? You can see my setup if you click on my HT Gallery to the right.

Thanks.

Last edited by Johnny Vinyl; 12-21-2011 at 05:46 PM.
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Old 01-18-2010, 02:39 PM   #2
liquidice liquidice is offline
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I've been down this road many times with my own setup, and have asked many questions about the settings that Audyssey chooses. I too used to change some of the settings after Audyssey runs, but after reseting up my system a couple weeks ago and recalibrating in all 8 spots, I left the settings completely alone, and it sounds fine.

Someone else can comment exactly how this works, but if you mess with the x-over settings, the roll off from speaker to sub will be compromised.

I'll post my setting later as soon as my daughter gives me access to my tv
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Old 01-18-2010, 03:10 PM   #3
tilallr1 tilallr1 is offline
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Quote:
Originally Posted by liquidice View Post
I've been down this road many times with my own setup, and have asked many questions about the settings that Audyssey chooses. I too used to change some of the settings after Audyssey runs, but after reseting up my system a couple weeks ago and recalibrating in all 8 spots, I left the settings completely alone, and it sounds fine.

Someone else can comment exactly how this works, but if you mess with the x-over settings, the roll off from speaker to sub will be compromised.

I'll post my setting later as soon as my daughter gives me access to my tv
What do you use for your 8 spots? What I used was:

456
312

Where do you place the mic for 7 & 8?

I guess another question is, I know the Onkyo makes the mistake of setting certain speakers to Full when they are not. Which is why I changed these to 80Hz to match the x-over Audyssey set for the Sub. Is this the correct setting for the Fronts or should I have set it higher?
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Old 01-18-2010, 04:54 PM   #4
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Quote:
Originally Posted by tilallr1 View Post
Ok ... so I did a recalibration yesterday and everything does sound much ... much better with the sub moved near the left front wall. I guess no matter what you do Audyssey cannot fix a badly placed sub. Also, I took 6 measurements around my primary listening area instead of just 3.

Anyway, interestingly here is how the crossover setting on the Onkyo turned out:

Subwoofer - Yes
Fronts - Full Band *** Which I Manually Changed To 80Hz (THX)
Center - 150Hz
Surrounds - 120Hz
Rear Surrounds - 150Hz
2 Channel Rear - Yes
LFE - 80Hz (THX)

Now the surround sound and bass have a much cleaner and more encompassing feel.

Also, interestingly enough, the Sub volume went up to -6dB. It is also much more pronounced. But does not sound boomy. Although my door now rattles, which I will have to fix with weather strips, or leave it slightly open.

NOTE: After reading further I have discovered that the Receiver should be reading a range of +3dB to -3dB on the Sub. So I should be turning the gain down on my Sub until Audyssey sets my receiver somewhere in that range. So I guess another recalibration will be in order.

My major question is, why did Audyssey setup the crossovers so high on my center surrounds and rears? Although they sound great, am I now missing sound (.1 range) out of these speakers because of these settings?

I tried setting them all to 80Hz (THX), but they didn't sound as good. I assume it has to do with the bass dynamics of my room. But I don't understand why.

Any insight? You can see my setup if you click on my HT Gallery to the right.

Thanks.

Raise your subwoofer to 150hz. You want your highest frequency speaker crossed with your sub. Otherwise you will have a "hole" in your center and surrounds. With your sub at 80 you are missing frequency between 80 and 120 on your center and between 80 and 150 with your surrounds.
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Old 01-18-2010, 05:08 PM   #5
tilallr1 tilallr1 is offline
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Post

Quote:
Originally Posted by -dase- View Post
Raise your subwoofer to 150hz. You want your highest frequency speaker crossed with your sub. Otherwise you will have a "hole" in your center and surrounds. With your sub at 80 you are missing frequency between 80 and 120 on your center and between 80 and 150 with your surrounds.
Thanks. I will give that a try. But a couple of questions before I do:

(1) Some people mention problems with localization of LFE by bringing up the Sub above 80Hz. They start to hear voices and other things coming from the subs location instead of where they are suppose to be. Your thoughts?

(2) Most soundtracks do not go above 80 on LFE. So are you really missing anything?
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Old 01-18-2010, 10:06 PM   #6
jomari jomari is offline
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its my day off, bear with me as id rather not be online and give myself a break...

Quote:
Originally Posted by tilallr1 View Post
I guess another question is, I know the Onkyo makes the mistake of setting certain speakers to Full when they are not. Which is why I changed these to 80Hz to match the x-over Audyssey set for the Sub. Is this the correct setting for the Fronts or should I have set it higher?
first off, a reference to my original posting a while back explaining what audyssey does...

MCACC settings (and its counterparts like audyssey), are essentially built in tools used for the common clientele to calibrate their systems, including speaker distance, equalization (at times), and other parameters tailored towards your listening area, resulting in a good fine tuned environment.

quick reference towards what MCACC does...

pioneer link

IDEALLY.

its a great way to start figuring out the relations of your speakers and the acoustic environment you currently have. sure its not up to par to a calibration done by a professional, nor would it determine everything up to a precision, but its a start.

it does tho, most of the time, has a hard tiime evaluating the speakers size, and since subs produce a non-localized point, its difficult for it to determine where it is. remember: this is a tool used primarily for ROOM EQUALIZATION and not SPEAKER SETUPS. this is only an add on.

better results can be had tho using a SPL meter and a quick learning of how to use em properly.

the best results would be using an True RTA program paired with a good calibration microphone.

As stated by a very good colleague of mine, these 'built in' gizmos and products are simple add ons by these manufacturers to solve all problems, both realistic and well, relative. The most important aspects of it boil down to getting the basics done right. Acoustic treatments, placements, etc. in a comparative example these are the 'miracle diet pills' that are included, when all you need is a good diet and exercise.


original posting

Quote:
Originally Posted by -dase- View Post
Raise your subwoofer to 150hz. You want your highest frequency speaker crossed with your sub. Otherwise you will have a "hole" in your center and surrounds. With your sub at 80 you are missing frequency between 80 and 120 on your center and between 80 and 150 with your surrounds.
it depends, id have to find out more details as to what the speakers drivers frequency ranges are prior to doing so. i highly doubt that the center speakers lowest frequencies are standing at 150hz. send us a line about what the speakers model numbers are... wait, checked your current HT gallery, and it indicates your using SVS MT series... great choice! the specs are indicated here , clearly showing its more than capable of going to about 68hz (aside from roll offs) if you can please set up your crossovers to 60hz and give it a shot. or you can try 80hz and see how that goes for you. in regards to your subwoofer settings, disable crossover settings, and let the AVR do the work for you... its on the right side, a switch you should flip to the left...



Quote:
Originally Posted by tilallr1 View Post
Thanks. I will give that a try. But a couple of questions before I do:

(1) Some people mention problems with localization of LFE by bringing up the Sub above 80Hz. They start to hear voices and other things coming from the subs location instead of where they are suppose to be. Your thoughts?

(2) Most soundtracks do not go above 80 on LFE. So are you really missing anything?
1. true, but depending on the subwoofer and the speaker setup, you'd see people use ranges from 60hz, 80hz, 100 to even 120hz. the sub would start 'talking' for a number of reasons, a good example would be improper crossover settings, or in some cases, just subs that werent built er... 'well'. in your case, nothing to fear if you follow my conclusions i will post at the bottom.

2. not go above 80hz on the lfe? true, but then again, the front or center channels would have material over this, thus the gap between 80hz and 120hz is visible. for example, your telling me that
1. center speaker is set at 150hz
2. sub set at 800hz,

you will be missing everything that is sent from the center speaker between 80hz to 149hz...

suggestions are as follows
1. AVR settings
- speakers - set at SMALL
- crossover point - set at 80hz or at 60hz, preferably 80 to follow the one octave rule

2. Sub settings
- crossover - DISABLE (via switch i showed you)
- adjust gain appropriately, or follow the proper calibration techniques discussed by bd...

3. its about placement and acoustic treatments. ive always considered this as a major improvement, and worthy investment as to make the best out of your room. ive mentioned it before 'id rather hear the speakers not the room', and love to refer to this as always. if you dont mind me suggesting, your current ht setup might benefit immensely from such.

you have the amazing gear tilallr's, i hope you can maximize its potential.

aside from my mopads, the best investment ive ever had would be an SPL meter, and learning to calibrate with it.

just my 2 cents.
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Old 01-18-2010, 10:31 PM   #7
Big Daddy Big Daddy is offline
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There is only one additional point that I would like to add. If you raise the crossover settings to higher numbers, it is still ok as far as Audyssey is concerned. However, if you intentionally lower the high pass crossover filters of your speakers below the reported crossovers by Audyssey, corrections will not be performed on these additional frequencies that are not redirected to the subwoofer.

It may be helpful to read A Guide Bass Management.
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Old 01-19-2010, 12:37 PM   #8
tilallr1 tilallr1 is offline
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Quote:
Originally Posted by jomari View Post
wait, checked your current HT gallery, and it indicates your using SVS MT series... great choice! the specs are indicated here , clearly showing its more than capable of going to about 68hz (aside from roll offs) if you can please set up your crossovers to 60hz and give it a shot. or you can try 80hz and see how that goes for you. in regards to your subwoofer settings, disable crossover settings, and let the AVR do the work for you... its on the right side, a switch you should flip to the left...
My version of this sub is different. It has no crossover knob. Also, the phase is set to 0 and my gain is about 1/2 way.

Quote:
Originally Posted by jomari View Post
1. true, but depending on the subwoofer and the speaker setup, you'd see people use ranges from 60hz, 80hz, 100 to even 120hz. the sub would start 'talking' for a number of reasons, a good example would be improper crossover settings, or in some cases, just subs that werent built er... 'well'. in your case, nothing to fear if you follow my conclusions i will post at the bottom.
Kinda what I thought. Trust me, this sub is excellent at handling everything I throw at it. So I have changed the LFE crossover settings to its max at 120Hz. I also changed my main front speakers to 100Hz to match my left and right surround and brought my center and rears down to 120Hz from 150Hz so I do not have any hole in my sound. I earlier listed my surround setting at 120Hz when it should have been 100Hz. Sorry about that. Interestingly the speakers not emit a little too much bass now. I am wondering weather these speakers are more bass heavy than the average, thus the higher frequencies set by Auydssey.


Quote:
Originally Posted by jomari View Post
you will be missing everything that is sent from the center speaker between 80hz to 149hz...
Are you positive about this? Isn't it just the LFE (.1) sound on that speaker? I sorry I take it back ... I guess anything in that range is LFE (.1). So I guess I would be missing the sound (bass).

Quote:
Originally Posted by jomari View Post
suggestions are as follows
1. AVR settings
- speakers - set at SMALL
- crossover point - set at 80hz or at 60hz, preferably 80 to follow the one octave rule

2. Sub settings
- crossover - DISABLE (via switch i showed you)
- adjust gain appropriately, or follow the proper calibration techniques discussed by bd...

3. its about placement and acoustic treatments. ive always considered this as a major improvement, and worthy investment as to make the best out of your room. ive mentioned it before 'id rather hear the speakers not the room', and love to refer to this as always. if you dont mind me suggesting, your current ht setup might benefit immensely from such.
Regarding 1, my speakers have individual crossover settings on the Onkyo. I cannot just set them to small. Each set or single speaker have there own setting. Now Auydssey picked those out for me. Should I change them?

Regarding 3, yes my room does need acoustic panels and treatment. I do plan to do this, but unfortunately due to budget constraints it will have to wait.

I do plan on purchasing an SPL meter as well, especially for proper calibration and placement of my sub. But I think the new home I found it near to left wall already sound a whole ton better.

Thanks for all the suggestions. I will give them a try.
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Old 01-19-2010, 12:43 PM   #9
tilallr1 tilallr1 is offline
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Quote:
Originally Posted by Big Daddy View Post
There is only one additional point that I would like to add. If you raise the crossover settings to higher numbers, it is still ok as far as Audyssey is concerned. However, if you intentionally lower the high pass crossover filters of your speakers below the reported crossovers by Audyssey, corrections will not be performed on these additional frequencies that are not redirected to the subwoofer.

It may be helpful to read A Guide Bass Management.
I did read the article. Thanks so much for all the wealth of information you have provided me. Only problem is I feel like I just opened up Pandora's box. So many more things to think about now. Ignorance is bliss. Well unless you have crappy sound.

So raising the Fronts (FULL to 100Hz) & Sub (80Hz to 120Hz) is AOK. But reducing the Center and Rears (150Hz to 120Hz) is not ? Is that what your saying?

If so I think I might have a problem? My Sub can only be raised to 120Hz. This is the max x-over setting the Onkyo can do for LFE. So won't I be missing sound from 120Hz to 150Hz on my center and rears? Should I set the center and rears back? Do you know why Audyssey set them so high in the first place, as these speaker are all capable of 70Hz easy.

Oh, one more question. If the Sub is set to 120Hz and my Front and Surrounds are at 100Hz, won't there be a bit of LFE overlap? Isn't that a bad thing? Double Bass or too much bass could cancel itself out right?

Last edited by tilallr1; 01-19-2010 at 01:07 PM.
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Old 01-19-2010, 12:59 PM   #10
tilallr1 tilallr1 is offline
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SPEAKER DETAILS

Model Name................SBS-01....................................SCS-01
Configuration...............Bookshelf............. ....................Center Channel
Dimensions..................12" x 7" x 9.5"...........................7" x 20" x 8.5"
Weight.......................11lbs (5kg)...............................19lbs (8.6kg)
Drivers.......................Tweeter(1) 1" (25mm) BlackSilk....Tweeter(1) 1" (25mm) BlackSilk
Woofer......................(1) 6" (152mm) SoftCap Cone.......(2) 6" (152mm) SoftCap Cone
Frequency Response....68Hz - 20kHz ± 3dB....................68Hz - 20kHz ± 3dB
Nominal Impedance......8 ohms.....................................8 ohms
Sensitivity................. 85dB.......................................87dB
Power Handling............20W - 120W.............................20W - 120W
Magnetically Shielded?..Yes.................................... .....Yes
Enclosure Material........MDF w/ internal bracing..............MDF w/ internal bracing

Last edited by tilallr1; 01-19-2010 at 01:05 PM.
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Old 01-19-2010, 05:16 PM   #11
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still my day off, thus a quick reply only. sorry tilallr1, i have to live a little bit.

Quote:
Originally Posted by tilallr1 View Post
My version of this sub is different. It has no crossover knob. Also, the phase is set to 0 and my gain is about 1/2 way.
then set your crossover settings on the sub to its highest position which should be around 120hz... what version did you have btw? thats a tad wierd. use the LFE plug then, that bypasses the crossovers settings entirely, thus solving your problem.


Quote:
Kinda what I thought. Trust me, this sub is excellent at handling everything I throw at it. So I have changed the LFE crossover settings to its max at 120Hz. I also changed my main front speakers to 100Hz to match my left and right surround and brought my center and rears down to 120Hz from 150Hz so I do not have any hole in my sound. I earlier listed my surround setting at 120Hz when it should have been 100Hz. Sorry about that. Interestingly the speakers not emit a little too much bass now. I am wondering weather these speakers are more bass heavy than the average, thus the higher frequencies set by Auydssey.
the speakers can handle more than an average satellite can, and should be able to handle lower frequencies, or its not a svs. on a serious note, its not about the bass but the relation between how it produces bass, and how it 'melds' with the subwoofer, giving you a fluid transition. (i havent had my coffee yet so pardon my jibberish)...

Quote:
Are you positive about this? Isn't it just the LFE (.1) sound on that speaker? I sorry I take it back ... I guess anything in that range is LFE (.1). So I guess I would be missing the sound (bass).
yes, the information sent to the LFE is different from the other speakers, but you have to look at it in an opposite way, the crossovers are sending the information you have set it on into the subwoofer so it can handle the lower frequencies.

for example,

crossover settings on speaker, 60hz.
subwoofer will receive the LFE signal, and anything lower than 60hz that you want the sub to reproduce. simply managing where it will send the lower frequencies to. thus bass management.

Quote:
Regarding 1, my speakers have individual crossover settings on the Onkyo. I cannot just set them to small. Each set or single speaker have there own setting. Now Auydssey picked those out for me. Should I change them?
the speaker settings on onkyos are either FULL or a certain frequency. when you choose ANYTHING aside from FULL (meaning full bandwidth), you are simply creating the crossover settings, thus predetermining the speakers set to SMALL. quite ingenious considering the confusion about LARGE or SMALL.

Quote:
Regarding 3, yes my room does need acoustic panels and treatment. I do plan to do this, but unfortunately due to budget constraints it will have to wait.
ill wait for you.

Quote:
I do plan on purchasing an SPL meter as well, especially for proper calibration and placement of my sub. But I think the new home I found it near to left wall already sound a whole ton better.

Thanks for all the suggestions. I will give them a try.
the way i see it, you want to calibrate it once, or twice a year, and then leave it alone. the SPL meter is an essential tool to confirm the two most essential tools you already have.

the left ear.
the right ear.

all in all, speaker placement is essential, and from the looks of it, you're pretty much covered!

'the other guy' will be back tomorrow, 1pm PST.

time for coffee.
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Old 01-19-2010, 06:10 PM   #12
tilallr1 tilallr1 is offline
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Quote:
Originally Posted by jomari View Post
then set your crossover settings on the sub to its highest position which should be around 120hz... what version did you have btw? thats a tad wierd. use the LFE plug then, that bypasses the crossovers settings entirely, thus solving your problem.


This is what it looks like. Pretty basic and easy to setup. I think it was the very first few PB10-NSD produced about 2-3 years ago. Not sure if the design has changed. I think the picture you listed was the PB12-NSD, which is the 12" woofer model.

Here is a link to a review with specs and pictures of the sub for your reference:
http://forums.audioholics.com/forums...ad.php?t=47005

Here are the specs:

-Proprietary, SVS long-throw 10" NSD woofer
-300 watt BASH digital switching amp
-CAD cabinet with CNC brace and 1" front baffle
-Front-firing design with flush fit woofer and vent
-Patented 3" ID, wide-flare port fittings
-Six removable, compliant floor isolation points
-Extra heavy-duty, removable 8 foot power cord
-Contemporary, "seamless" cabinet styling
+/- 3dB from 20-100 Hz anechoic (in room extension will be 2-5 Hz deeper)
-Size: 15" wide x 19" high x 21" deep
-Weight: 60 pounds

It is essentially a 10" woofer residing in the body of a 12" sub.

Last edited by tilallr1; 01-19-2010 at 06:29 PM.
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Old 01-19-2010, 08:24 PM   #13
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the reason i presumed it was the PB12 was from your ht gallery... or maybe because i misread it. nonetheless...

man, this is old school! i remember we had a couple of members review this bad boy, and albeit its size and limited features, it still can do the job. one of my colleagues actually helped in implementing changes with its bracing, due to certain challenges.

from what i can remember, just leave it as is then. let the AVR handle the bass management, set the gain respectively with the SPL meter, and let things go the way they go...
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Old 01-19-2010, 08:47 PM   #14
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Quote:
Originally Posted by Big Daddy View Post
There is only one additional point that I would like to add. If you raise the crossover settings to higher numbers, it is still ok as far as Audyssey is concerned. However, if you intentionally lower the high pass crossover filters of your speakers below the reported crossovers by Audyssey, corrections will not be performed on these additional frequencies that are not redirected to the subwoofer.

It may be helpful to read A Guide Bass Management.

This is why I suggested raising the crossover for the sub instead of lowering the crossovers on the speakers.

If they truly are capable of lower frequencies than what audyssey set them at then I would re-run it to see if your results come out different and more acceptable.
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Old 01-19-2010, 09:39 PM   #15
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Quote:
Originally Posted by -dase- View Post
This is why I suggested raising the crossover for the sub instead of lowering the crossovers on the speakers.

If they truly are capable of lower frequencies than what audyssey set them at then I would re-run it to see if your results come out different and more acceptable.
I hear you. I guess I will try that first and see where it takes me. I noticed that the bass gets muddy when I set the crossovers on the speakers lower. So I will leave them alone and redo calibration (for the 6th time).

Out of curiosity ... how many times did you calibrate to get it perfect for your ears?
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Old 01-19-2010, 10:32 PM   #16
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Just a bit confused with this thread... Not sure everyone is talking about the same thing. The LFE on your Onkyo is NOT a crossover. This is the .1 channel only. It should be set to 120hz. There will be no 'hole' in the sound.

The crossover on the sub should be bypassed. Leave your settings as they were detected except for the mains. Set them to 80hz.

I would guess the location of your center is why it was detected at 150hz. Where is it located? Is it pointed at the main listening position?

BTW - The LFE was not detected. It was set that way from some other means.

Also, don't worry about getting your sub +/- 3db. As long as it is not +/- 12db, you are fine.
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Old 01-19-2010, 11:07 PM   #17
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Quote:
Originally Posted by -dase- View Post
This is why I suggested raising the crossover for the sub instead of lowering the crossovers on the speakers.

If they truly are capable of lower frequencies than what audyssey set them at then I would re-run it to see if your results come out different and more acceptable.
Let's not get confused here. Onkyo does bass management according to the following diagram.




The Low Pass Filter (LPF) of LFE has nothing to do with the high pass crossovers of the other speakers. The LFE (.1) channel is programmed by audio engineers and usually goes up to 120Hz. With new blu-ray discs, this is probably a reduntant and obsolete option. Unfortunately, there are some older DVD's that may have an LFE channel that is full range or go a lot higher than 120Hz. To protect the subwoofer and make sure the quality of sound is maintained, we should always set the LPF of LFE to 120Hz. This has nothing to do with the other speakers. Audio hole is created if you set the LPF of LFE to a lower number than 120Hz.

It doesn't matter what the frequency response of your speakers (as reported by the manufacturer) are. Assuming the speakers are from a reputable manufacturer, those measurements are made in an anechoic chamber under ideal conditions. Your home theater room is not an anechoic chamber. The location of the speakers, the walls, furniture, rugs, curtains, and even your body may have an effect on the response of the speakers.

As I said before, if you increase the high pass crossover filters as reported by Audyssey, you should be ok. If you lower them, Audyssey will not perform corrections on those additional frequencies that stay in the speakers and will not go to the subwoofer. According to Chris at Audyssey, the low frequency correction filters of Audyssey have 8 times more resolution and it is better to let the subwoofer does its job.

If you want, rearrange the room and run Audyssey again. Make sure you place the microphone in all 6 or 8 positions. Basic Audyssey in some receivers recommends 6 positions and the more advanced Audyssey in more expensive receivers recommends 8 positions.

Last edited by Big Daddy; 01-21-2010 at 09:38 PM.
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Old 01-20-2010, 01:14 AM   #18
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Originally Posted by Big Daddy View Post
To protect the subwoofer and make sure the quality of sound is maintained, we should always set the LPF of LFE to 120Hz. This has nothing to do with the other speakers. Audio hole is created if you set the LPF of LFE to a lower number than 120Hz.


As I said before, if you increase the high pass crossover filters as reported by Audyssey, you should be ok. If you lower them, Audyssey will not perform corrections on those additional frequencies that stay in the speakers and will not go to the subwoofer. According to Chris at Audyssey, the low frequency correction filters of Audyssey have 8 times more resolution and it is better to let the subwoofer does its job.
Sorry for the confusion. The bolded are what I was attempting to get at.
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Old 01-20-2010, 12:23 PM   #19
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Quote:
Originally Posted by Big Daddy View Post
Let's not get confused here. Onkyo does bass management according to the following diagram.




The Low Pass Filter (LPF) of LFE has nothing to do with the high pass crossovers of the other speakers. The LFE (.1) channel is programmed by audio engineers and usually goes up to 120Hz. With new blu-ray discs, this is probably a reduntant and obsolete option. Unfortunately, there are some older DVD's that may have an LFE channel that is full range or go a lot higher than 120Hz. To protect the subwoofer and make sure the quality of sound is maintained, we should always set the LPF of LFE to 120Hz. This has nothing to do with the other speakers. Audio hole is created if you set the LPF of LFE to a lower number than 120Hz.

It doesn't matter what the frequency response of your speakers (as reported by the manufacturer) are. Assuming the speakers are from a reputable manufacturer, those measurements are made in an anechoic chamber under ideal conditions. Your home theater room is not an anechoic chamber. The location of the speakers, the walls, furniture, rugs, curtains, and even your body may have an effect on the response of the speakers.

As I said before, if you increase the high pass crossover filters as reported by Audyssey, you should be ok. If you lower them, Audyssey will not perform corrections on those additional frequencies that stay in the speakers and will not go to the subwoofer. According to Chris at Audyssey, the low frequency correction filters of Audyssey have 8 times more resolution and it is better to let the subwoofer does its job.

If you want, Rearrange the room and run Audyssey again. Make sure you place the microphone in all 6 or 8 positions. Basic Audyssey in some receivers has recommends 6 positions and the more advanced Audyssey in more expensive receivers recommends 8 positions.
Thanks again for the clarification. I have set the LFE to 120Hz. The reason the Onkyo's set it by default to 80Hz is due to a hum problem (for some) at higher volumes when set to 120Hz. I have not noticed this so from now on I will set that to 120Hz. Unless a hum develops from the sub. But so far so good. I wonder how they expect people to know this stuff. Thank goodness for you guys.

Curious, prior to running Audyssey, should I be setting all the crossovers to 80Hz (except to LFE at 120Hz)? Does it make a difference when Audyssey is calculating things? Or does Audyssey simply set them based on base tests it performs and wipes the slate clean?

Also, I think I asked this before, but if my primary listening is just 2 theater chairs and I run Audyssey on 6 positions:

456
312

Where would I do 7 and 8?

Thanks.
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Old 01-20-2010, 12:36 PM   #20
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Originally Posted by dewd View Post
Just a bit confused with this thread... Not sure everyone is talking about the same thing. The LFE on your Onkyo is NOT a crossover. This is the .1 channel only. It should be set to 120hz. There will be no 'hole' in the sound.

The crossover on the sub should be bypassed. Leave your settings as they were detected except for the mains. Set them to 80hz.

I would guess the location of your center is why it was detected at 150hz. Where is it located? Is it pointed at the main listening position?

BTW - The LFE was not detected. It was set that way from some other means.

Also, don't worry about getting your sub +/- 3db. As long as it is not +/- 12db, you are fine.
Thanks, I guess I will leave the sub settings alone then. As said earlier my sub has no crossover settings. So no worries there.

My center is located just below my screen dead center in the room. It is angled upwards, pointed at head level. In fact, all speakers are toed in and\or angled, pointing at the primary listening position center of the room.

FYI: When I first ran Audyssey on the first 3 positions it gave me 120Hz for the center and the 2 rears. But when I ran for 6 it changed it to 150Hz. I assume running more gives more accurate results?
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