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Search: Posts Made By: Okv
Forum: DIY Speakers and Subs   04-03-2015, 05:45 PM
Replies: 341
  HzHorn
Views: 9,405
Posted By Okv
I find this interesting. It matches up with...

I find this interesting.

It matches up with my own experiences with bass horns, more or less.
They do sound different, also at lower volume.
More life-like, more punchy without being bloated,...
Forum: Subwoofers, Bass, and Transducers   04-03-2015, 08:46 AM
Replies: 3,182
Views: 108,856
Posted By Okv
This seems to be the best approach, even the...

This seems to be the best approach, even the lowest freqs can easily be felt when things move, but hearing or feeling the pressure is not necessarily so - some report they hear a 10hz, some say the...
Forum: Subwoofers, Bass, and Transducers   04-03-2015, 08:35 AM
Replies: 3,182
Views: 108,856
Posted By Okv
A dba - if it works properly - is like free...

A dba - if it works properly - is like free field, and all properties of the sound field are easily predictable.
Intensity is good and constant across the whole room, velocity is predictable and at...
Forum: Subwoofers, Bass, and Transducers   04-02-2015, 06:07 PM
Replies: 3,182
Views: 108,856
Posted By Okv
Unfortunately this is the case. In a sealed...

Unfortunately this is the case.

In a sealed room, with a normal subwoofer system where all units are playing in-phase, you will get a high pressure-gain as frequency goes down below the lowest...
Forum: DIY Speakers and Subs   03-23-2015, 07:55 PM
Replies: 24
Views: 755
Posted By Okv
I also found that the higher velocity was very...

I also found that the higher velocity was very noticeable at loud volumes, but not so much, if any at all, at lower volumes - if that is what you mean.

Considering the importance of this for...
Forum: Subwoofers, Bass, and Transducers   03-23-2015, 02:40 PM
Replies: 3,182
Views: 108,856
Posted By Okv
If you suspect the subs add movement due to them...

If you suspect the subs add movement due to them physically vibrating or moving, this effect will most likely be very, very small compared to what the sound pressure does to the large riser area.
...
Forum: Subwoofers, Bass, and Transducers   03-23-2015, 12:04 PM
Replies: 3,182
Views: 108,856
Posted By Okv
This is great, coolrda. Another tool in the...

This is great, coolrda.
Another tool in the box that gives a real improvement that does not need any double-blind testing to confirm there is a difference.

I have seen at least one other...
Forum: DIY Speakers and Subs   03-21-2015, 11:05 AM
Replies: 24
Views: 755
Posted By Okv
It is very likely Gizze is right, the experienced...

It is very likely Gizze is right, the experienced improvement in tactile feel is due to more velocity produced in the new set-up.

Look at the freq resp in the #1...
Forum: Subwoofers, Bass, and Transducers   03-20-2015, 07:41 PM
Replies: 3,182
Views: 108,856
Posted By Okv
Intensity depends on the phase relationship...

Intensity depends on the phase relationship between velocity potential and pressure as well, you can have very high velocity and close to zero intensity, such as in a standing wave.

With no...
Forum: AVS Forum Podcasts   03-18-2015, 01:08 PM
Replies: 13
Views: 824
Posted By Okv
First, thanks to Scott Wilkinson for making this...

First, thanks to Scott Wilkinson for making this episode, with those very knowledgeable heavy-weights in the industry.
The episode covers so much, it is of course only possible to briefly enter...
Forum: AVS Forum Podcasts   03-18-2015, 12:31 PM
Replies: 13
Views: 824
Posted By Okv
I don't want to argue with any of you on that,...

I don't want to argue with any of you on that, just saying after reading the report I got the impression that they more or less followed the specifications, contrary to the conclusions made by the...
Forum: Subwoofers, Bass, and Transducers   03-15-2015, 03:00 PM
Replies: 3,182
Views: 108,856
Posted By Okv
Exactly. In a developed free-field soundfield,...

Exactly.
In a developed free-field soundfield, the relationship between pressure and velocity potential is given, but once you move into a room with walls and boundaries, things start to change...
Forum: Subwoofers, Bass, and Transducers   03-11-2015, 04:32 PM
Replies: 3,182
Views: 108,856
Posted By Okv
The first few ms contain information for higher...

The first few ms contain information for higher freqs up into the midrange, the bass extends much longer, 50-100ms.

Only by looking at those graphs, I can only guess, but the first one indicates...
Forum: Subwoofers, Bass, and Transducers   03-11-2015, 12:58 PM
Replies: 3,182
Views: 108,856
Posted By Okv
I would think a would have a larger velocity...

I would think a would have a larger velocity potential, out-of-phase sources creates velocity.
To be sure, you would need to test it.
Listen and experience, then measure, both velocity and...
Forum: Subwoofers, Bass, and Transducers   03-11-2015, 12:48 PM
Replies: 3,182
Views: 108,856
Posted By Okv
The last one (unfiltered) clearly shows a step...

The last one (unfiltered) clearly shows a step response that looks much more like the "ideal".
If you delay the mains, the filtered (first) will most likely improve, and adjusting so that the...
Forum: Subwoofers, Bass, and Transducers   03-10-2015, 09:31 PM
Replies: 3,182
Views: 108,856
Posted By Okv
dominguez1 and coolrda; These observations...

dominguez1 and coolrda;

These observations certainly makes sense, getting the bass right is not simply to place subwoofers all around the room and then use eq to flatten the frequency response...
Forum: Subwoofers, Bass, and Transducers   11-27-2014, 01:26 PM
Replies: 10
Views: 376
Posted By Okv
The best track for this is called pink noise. ...

The best track for this is called pink noise.
Find a pink noise file, play on auto-repeat, and if you find one that is bandwidth-limited to around 120hz, it will be easier to hear.

Sometimes it...
Forum: AVS Forum Podcasts   11-26-2014, 07:34 AM
Replies: 61
Views: 4,199
Posted By Okv
This article is a good example for why a...

This article is a good example for why a near-field re-mix is likely to reduce sound quality.

No standard for calibration, speakers and subwoofers with inadequate headroom, and the usual...
Forum: AVS Forum Podcasts   11-24-2014, 09:46 AM
Replies: 61
Views: 4,199
Posted By Okv
"Re-mixing for the home environment is a terribly...

"Re-mixing for the home environment is a terribly bad idea"

Thumbs up to Anthony Grimani for pointing out that, and for the excellent explanation on why near-field re-mixes are not necessary and...
Forum: Home Theater Computers   11-02-2014, 08:56 AM
Replies: 58
Views: 1,684
Posted By Okv
The htpc is the only source, everything from...

The htpc is the only source, everything from streaming and intenet to bd and music, all from one machine.

I run XBMC/Kodi on ubuntu.
It plays everything, from low-res video files to lossless...
Forum: Subwoofers, Bass, and Transducers   11-02-2014, 08:24 AM
Replies: 20,891
Views: 1,320,693
Posted By Okv
Education and better monitoring systems. In a...

Education and better monitoring systems.
In a proper presentation the best will be preferred, but they must be given the opportunity to experience the difference.

I have claimed they could not...
Forum: Subwoofers, Bass, and Transducers   11-01-2014, 11:00 AM
Replies: 20,891
Views: 1,320,693
Posted By Okv
Just telling how bad it sounds, and that it...

Just telling how bad it sounds, and that it really is the people making and selling the films that is to blame, indirectly says that sound quality does not matter.

If sound quality was important,...
Forum: Subwoofers, Bass, and Transducers   11-01-2014, 10:09 AM
Replies: 20,891
Views: 1,320,693
Posted By Okv
Everyone can contribute. An obvious way to...

Everyone can contribute.

An obvious way to state your opinion is to buy the films with good sound, and avoid the neutered ones. Spreading the word helps much more, enthusiasts have a great...
Forum: DIY Speakers and Subs   10-31-2014, 10:14 PM
Replies: 57
Views: 5,787
Posted By Okv
Those atmos demo files can be downloaded from the...

Those atmos demo files can be downloaded from the demo-site, it's called eu-demo-something.
The ones labeled atmos and lossless are the ones with the TrueHD atmos tracks.

Due to a bug in...
Forum: Audio Theory, Setup, and Chat   10-31-2014, 07:00 PM
Replies: 20
Views: 769
Posted By Okv
If you want to reproduce this low-freq content,...

If you want to reproduce this low-freq content, the best way to do it is to use bass-management on all channels.

This will then filter out the low bass from the speakers and reroute all low bass...
Showing results 1 to 25 of 213

 
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