The "Official" xtz Room Analyzer Thread - Page 18 - AVS Forum | Home Theater Discussions And Reviews
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post #511 of 535 Old 08-29-2015, 07:03 AM
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Quote:
Originally Posted by Franin View Post
Well we had a dip at the 80hz back in that time once we took them out remeasured the 80hz was back alive.


Frank
So are you saying you had a dip at 80Hz when the bass traps were in, you removed them, re measured and the dip at 80Hz was still there?

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post #512 of 535 Old 08-29-2015, 07:08 AM
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The "Official" xtz Room Analyzer Thread

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Originally Posted by RapalloAV View Post
So are you saying you had a dip at 80Hz when the bass traps were in, you removed them, re measured and the dip at 80Hz was still there?

No it wasn't there any more after we removed them it was like it was sucking the 80hz. From then on never had them. I have no idea why though by removing them it fixed it


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post #513 of 535 Old 08-29-2015, 07:10 AM
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Mind you my setup was quite different back then


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post #514 of 535 Old 08-29-2015, 07:14 AM
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Quote:
Originally Posted by Franin View Post
Mind you my setup was quite different back then


Frank
Ok, try and get those measurements done with sub distance as I suggested and lets see what you come up with from your 8802.

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post #515 of 535 Old 08-29-2015, 07:17 AM
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The "Official" xtz Room Analyzer Thread

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Originally Posted by RapalloAV View Post
Ok, try and get those measurements done with sub distance as I suggested and lets see what you come up with from your 8802.

No problems when I get a chance I shall have a look




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post #516 of 535 Old 08-29-2015, 09:00 AM
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Quote:
Originally Posted by RapalloAV View Post
Can you point us to that article from Craig please?
Surprised its not a link on Page 1 perhaps Craig will add it.
Kudos also goes to Mark Seaton

Damn there should be some XTZ screen shots in the document which haven't uploaded
Search the thread it should be in there somewhere

Regards
Andy

Last edited by Lesmor; 08-29-2015 at 09:07 AM.
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post #517 of 535 Old 08-29-2015, 10:16 PM
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Hopefully I can get some time today to look at XTZ and distances but I'm also researching into Bass Traps. After talking to Raplloav my previous bass traps were crap. Doing some research I'll have to look into bass traps that actually have proven data ( that work they way they should work ). But before I invest I will check the XTZ.


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post #518 of 535 Old 08-30-2015, 12:12 AM
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Quote:
Originally Posted by Franin View Post
Hopefully I can get some time today to look at XTZ and distances but I'm also researching into Bass Traps. After talking to Raplloav my previous bass traps were crap. Doing some research I'll have to look into bass traps that actually have proven data ( that work they way they should work ). But before I invest I will check the XTZ.


Frank

Great stuff Frank!
Look into Rockwool and DIY, you will save heaps! Dense rigid Rockwool 4" thick is a good start, however if you want them to work deep down they need to be much more than 4" thick, just double up layers. There are heaps of videos on Youtube how to make them, just search for "DIY bass Traps"

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post #519 of 535 Old 08-30-2015, 01:33 AM
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Quote:
Originally Posted by RapalloAV View Post
Great stuff Frank!
Look into Rockwool and DIY, you will save heaps! Dense rigid Rockwool 4" thick is a good start, however if you want them to work deep down they need to be much more than 4" thick, just double up layers. There are heaps of videos on Youtube how to make them, just search for "DIY bass Traps"

Thanks for that RapalloAV. Will look into watching some of the videos.


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post #520 of 535 Old 08-30-2015, 04:57 AM
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Mine doesn't work either. My subwoofers are set at 9.5 feet and 9.2 feet so I decided to change it straight too 2.5 feet and 2.2 feet barely even changed on screen. The REW software can that accept our XTZ mic or do I have to go and buy a separate mic ?

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post #521 of 535 Old 08-30-2015, 05:11 AM
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I've just found REW does pick up XTZ mic. Now I have to start leaning how to use that.


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post #522 of 535 Old 08-30-2015, 06:55 AM
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Quote:
Originally Posted by Franin View Post
I've just found REW does pick up XTZ mic. Now I have to start leaning how to use that.


Frank
That's interesting I think you also need the microphones cal file, where did you find that?
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post #523 of 535 Old 08-30-2015, 07:18 AM
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That's interesting I think you also need the microphones cal file, where did you find that?

I assumed that when I plugged the XTZ into USB I noticed on rew it showed XTZ for soundcard so I was wrong. But on another note I don't know how to use REW I need to sit and read manual.

I started playing around with moving my seats and subs I seemed to get a bit better result. But it's sounds great so I'm done with it. Between Hz especially in subs is very little 2-3db difference that I don't think I will find an audible difference.


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post #524 of 535 Old 08-30-2015, 07:51 AM
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Quote:
Originally Posted by Franin View Post
I assumed that when I plugged the XTZ into USB I noticed on rew it showed XTZ for soundcard so I was wrong. But on another note I don't know how to use REW I need to sit and read manual.

I started playing around with moving my seats and subs I seemed to get a bit better result. But it's sounds great so I'm done with it. Between Hz especially in subs is very little 2-3db difference that I don't think I will find an audible difference.


Frank
With that difference must look pretty flat and you wont get better.
REW is a different animal altogether and if you get hooked you will spend the rest of your days doing nothing but tweaking your system.
If it sounds good sit back and enjoy
Andy
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post #525 of 535 Old 08-30-2015, 09:44 AM
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With that difference must look pretty flat and you wont get better.

REW is a different animal altogether and if you get hooked you will spend the rest of your days doing nothing but tweaking your system.

If it sounds good sit back and enjoy

Andy

Thanks Andy. Just finished watching the Maze Runner is the subs sounds tight and nice. I'm sure I can learn REW and further tweak but I cannot be bothered.
I remember doing the video calibrations with my lumagen and forever I was sitting and tweaking. Wasted a lot of time going in bloody circles.
Sometime when it sounds right or it looks right it's best to leave alone.



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post #526 of 535 Old 12-01-2015, 05:45 PM
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When using the distance setting in XTZ make sure the settings are set to 48,000 in the laptops soundcard settings.
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post #527 of 535 Old 12-09-2015, 05:07 AM
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Quote:
Originally Posted by Phillips751 View Post
When using the distance setting in XTZ make sure the settings are set to 48,000 in the laptops soundcard settings.
Can you explain the reason for this?
I just plug my XTZ Pro into my laptop in the hope it is P&Play so never checked the sound card settings.

Cheers
Andy
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post #528 of 535 Old 12-10-2015, 05:04 PM
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Hi it s latency
It is recommended to use 48000 .
My computer is old (still use it now)
Worked for me for timing, as before I was getting different readings. XTZ timing works so well.

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post #529 of 535 Old 12-10-2015, 05:17 PM
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Hi it s latency


Worked for me for timing, as before I was getting different readings. XTZ timing works so well.
Thanks Phillips
I'll check that next time I use XTZ
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post #530 of 535 Old 01-02-2016, 12:09 PM
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Anyone kind enough to offer suggestions how to address these dips in my room response?

I am using 2 Ken Kreisel 808 duos on the back wall and this graph is the un calibrated room response.

I have another 2 808 duos which I have tried in numerous positions, side-wall front wall front corners but the dips remain and adding the extra two subs ruin what looks to me like a good raw response.

The room is 20' x 17'6" but unfortunately there is an alcove front right and a bay window centred on the left wall.

Edit:
I should perhaps say that the design of the subs is that the top sub is inverted, and the drivers fire along the width of the room
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Last edited by Lesmor; 01-02-2016 at 02:43 PM. Reason: add text
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post #531 of 535 Old 01-03-2016, 08:34 AM
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guys- Just hooked up the xtz system and I am not getting any white noise- I do see movement on the graph but no sound??- Please help- thks
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post #532 of 535 Old 01-03-2016, 10:31 AM - Thread Starter
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A single point frequency response measurement, with no context of the measurement, is not nearly enough info to help you figure out the problem. Is this just the subwoofer, or the sub and some combo of speaker(s) and sub? If the later, which speaker(s)? What crossover frequency are you using?

If this is just the sub, can you move it to the middle of the room and do a nearfield measurement? (i.e., place the mic within about an inch of one of the drivers and run the sweep with the level about 10 dB lower than the above measurement.) This will be as close as you can get to an outdoor, groundplane measurement, and will display the inherent, baseline FR of the sub with as little interference from the room as possible.

Finally, can you take a measurement that averages 3 positions, the first being ear level at the primary LP, the second being the next most important LP, and the 3rd being 2 ft. in front of the LP?

Can you list your receiver or pre/pro, your speakers, their placements within the room, as well as describe were your LP's are within the room? Pic's or a diagram would be helpful.

Craig

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post #533 of 535 Old 01-03-2016, 10:41 AM - Thread Starter
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Quote:
Originally Posted by bebop86 View Post
guys- Just hooked up the xtz system and I am not getting any white noise- I do see movement on the graph but no sound??- Please help- thks
Assuming you're talking about the RTA screen, you must be in "Measure" not "Listen" in order the hear the noise signal. Also, be sure your receiver is set to the input you've plugged the XTZ signal cables into, and that it's set to Stereo on that input.

Lombardi said it:
Perfection is not attainable, but if we chase perfection we can catch excellence."

My System

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post #534 of 535 Old 01-03-2016, 02:27 PM
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Quote:
Originally Posted by craig john View Post

A single point frequency response measurement, with no context of the measurement, is not nearly enough info to help you figure out the problem. Is this just the subwoofer, or the sub and some combo of speaker(s) and sub? If the later, which speaker(s)? What crossover frequency are you using?

If this is just the sub, can you move it to the middle of the room and do a nearfield measurement? (i.e., place the mic within about an inch of one of the drivers and run the sweep with the level about 10 dB lower than the above measurement.) This will be as close as you can get to an outdoor, groundplane measurement, and will display the inherent, baseline FR of the sub with as little interference from the room as possible.

Finally, can you take a measurement that averages 3 positions, the first being ear level at the primary LP, the second being the next most important LP, and the 3rd being 2 ft. in front of the LP?

Can you list your receiver or pre/pro, your speakers, their placements within the room, as well as describe were your LP's are within the room? Pic's or a diagram would be helpful.

Craig
Hi Craig
Thanks for the response.
I thought that I may not have provided enough information so I will collate some more.

My initial though was to try and get a good rough bass response which is why I didn't measure the mains.
I am aware that once they are added the response will change.
MLP is 38% of room length.

I use Ken Kreisel Q-125 L/C/R
Ken Kreisel TriFX Surrounds.
QFH Rear surrounds
Q-85 Wides
QFH heights
F3 = 80Hz

Denon X-7200WA Receiver

Up to now only one stack gave a half decent result, while the second seems wasted and adds little to the bottom end.
I am trying to improve on that situation.

Thanks for the near field and 3 point MLP measurement tip but being a 6' high stack of 8" subs there are stability issues but I could try it with one.

I have added the stack to the original rear left corner which seems to be adding more than a front or side position.

I just need to find a good position for my L/R
I tried some suggestions to improve boundary interference but the L/R stand alone graphs are a disaster so far.

Will add more info later and more screen shots if required.
Cheers Andy
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Last edited by Lesmor; 01-04-2016 at 04:05 AM. Reason: add text
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post #535 of 535 Old Today, 06:14 AM
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Hi Dears,

Could you help me, please?

I have the first version of XTZ room analyser. It is a long time I don´t use it, and today I decided to proceed some measurements of my room, but I couldn´t find its software.
Do you know if the XTZ room alalyser II software com be used with the first version of the system?

Thank you very much.
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