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Search: Keyword(s): ; Posts Made By: diy speaker guy
Forum: DIY Speakers and Subs   01-30-2016, 05:50 PM
Replies: 22
Views: 389
Posted By diy speaker guy
This is probably pretty similar to how it would...

This is probably pretty similar to how it would be designed if it was a commercial product, with an undersized port and compression issues..

But IMO (and it's just IMO) this is completely...
Forum: DIY Speakers and Subs   01-30-2016, 04:17 PM
Replies: 22
Views: 389
Posted By diy speaker guy
Absolutely not, simulators will just report...

Absolutely not, simulators will just report velocity and it's up to you to decide what's safe and what isn't.
Forum: DIY Speakers and Subs   01-30-2016, 04:16 PM
Replies: 22
Views: 389
Posted By diy speaker guy
The design very likely had a high pass filter in...

The design very likely had a high pass filter in place, and as tuxedocivic points out this will help the velocity and chuffing issues quite a bit. It's also possible (although probably unlikely)...
Forum: DIY Speakers and Subs   12-18-2015, 01:49 PM
Replies: 79
Views: 1,380
Posted By diy speaker guy
There are already way too many Pringles speakers....

There are already way too many Pringles speakers. From boring -

http://3.bp.blogspot.com/-N7c6XdGvqpc/ULoz9Fyas2I/AAAAAAAAAao/YnywHNbY7Ls/s1600/IMAG0283.jpg

- to more complex -
...
Forum: DIY Speakers and Subs   12-18-2015, 01:10 PM
Replies: 79
Views: 1,380
Posted By diy speaker guy
Do we really need tests then? I'm willing to...

Do we really need tests then? I'm willing to give it a shot despite being in the middle of the busiest season of the year and having near freezing and wet conditions outside. I'm not even sure of...
Forum: DIY Speakers and Subs   12-18-2015, 12:47 PM
Replies: 79
Views: 1,380
Posted By diy speaker guy
Ok, I'll give this one last shot. There's a...

Ok, I'll give this one last shot.

There's a big difference between localized pressure in one or more spots in a room and the ability to uniformly pressurize the whole space in the room. The...
Forum: DIY Speakers and Subs   12-17-2015, 11:22 PM
Replies: 79
Views: 1,380
Posted By diy speaker guy
No measurement mic atm but I need one so maybe...

No measurement mic atm but I need one so maybe someday...
Forum: DIY Speakers and Subs   12-17-2015, 07:29 PM
Replies: 79
Views: 1,380
Posted By diy speaker guy
There may have been an error with the sims I...

There may have been an error with the sims I posted so I deleted them and may resim with John K's ABC Dipole if I get a change. Sorry. Full explanation in the deleted post.
Forum: DIY Speakers and Subs   12-17-2015, 04:59 PM
Replies: 79
Views: 1,380
Posted By diy speaker guy
I don't even know what to say about this,...

I don't even know what to say about this, Linkwitz and Kreskovsky are not both wrong.

As far as dipole side nulls, I am well aware that dipoles have a dipole (figure 8) dispersion pattern while...
Forum: DIY Speakers and Subs   12-17-2015, 04:40 PM
Replies: 79
Views: 1,380
Posted By diy speaker guy
You will have gains (and dips) due to boundary...

You will have gains (and dips) due to boundary reflections, you will have gains (and dips) above the Schroeder frequency, and probably some room gain (pressurization) below the Schroeder frequency as...
Forum: DIY Speakers and Subs   12-17-2015, 04:30 PM
Replies: 79
Views: 1,380
Posted By diy speaker guy
Ignoring definitions we can simply put it this...

Ignoring definitions we can simply put it this way.

Below the room's fundamental frequency the sealed box has the potential to have up to 12 db/oct due to room pressurization. The dipole will...
Forum: DIY Speakers and Subs   12-17-2015, 03:59 PM
Replies: 79
Views: 1,380
Posted By diy speaker guy
P is for pressure. Anyway, Linkwitz says the...

P is for pressure.

Anyway, Linkwitz says the same thing as Kreskovsky but in much more blunt fashion in this quote from here - http://www.linkwitzlab.com/rooms.htm



Linkwitz and John K are...
Forum: DIY Speakers and Subs   12-17-2015, 03:36 PM
Replies: 79
Views: 1,380
Posted By diy speaker guy
Not sure why you keep putting room gain in...

Not sure why you keep putting room gain in quotes. I'm talking about pressurization below the room's fundamental frequency and it's theoretically impossible for an OB to pressure a room that is much...
Forum: DIY Speakers and Subs   12-17-2015, 01:57 PM
Replies: 79
Views: 1,380
Posted By diy speaker guy
As big as possible IMO, ideally infinite baffle. ...

As big as possible IMO, ideally infinite baffle. It makes it easier to use up that usable excursion with less power. You have no shortage of amp power to be sure, but high power = thermal issues,...
Forum: DIY Speakers and Subs   12-17-2015, 01:29 PM
Replies: 79
Views: 1,380
Posted By diy speaker guy
No sir. If room gain (or cabin gain or whatever...

No sir. If room gain (or cabin gain or whatever you want to call it) is pressurization below the room's fundamental frequency, dipole cannot achieve any pressurization.

Here's a quote from John...
Forum: DIY Speakers and Subs   12-17-2015, 12:42 PM
Replies: 79
Views: 1,380
Posted By diy speaker guy
EDIT - there may have been a significant error in...

EDIT - there may have been a significant error in the results shown due to the version of the software used to create them. It's been so long since I used the software I don't recall which version...
Forum: DIY Speakers and Subs   11-10-2015, 11:36 AM
Replies: 276
Views: 9,118
Posted By diy speaker guy
Yes I saw it and commented on it. It's a nice Bl...

Yes I saw it and commented on it. It's a nice Bl curve but as I said it's only one part of the story. There are other factors that can and do produce large amounts of distortion that are being...
Forum: DIY Speakers and Subs   11-10-2015, 11:32 AM
Replies: 276
Views: 9,118
Posted By diy speaker guy
I don't have much time now but a quick 5 minute...

I don't have much time now but a quick 5 minute search found these quotes specifically stating that they were trying to destroy the driver but were unable to. This is just a few, this was said...
Forum: DIY Speakers and Subs   11-09-2015, 11:14 PM
Replies: 276
Views: 9,118
Posted By diy speaker guy
Audacity can only analyze mp3 and wav files so I...

Audacity can only analyze mp3 and wav files so I haven't analyzed any movies. i've looked at a lot of Speclab analysis posted by other people but I don't remember seeing anything quite like what I...
Forum: DIY Speakers and Subs   11-09-2015, 08:28 PM
Replies: 276
Views: 9,118
Posted By diy speaker guy
I don't have speclab. I do have Audacity. This...

I don't have speclab. I do have Audacity. This is a demanding track. When low passed this track is basically equivalent to a constant 37 hz sine wave from the time the intro ends to the end of the...
Forum: DIY Speakers and Subs   11-09-2015, 07:32 PM
Replies: 276
Views: 9,118
Posted By diy speaker guy
Now we are finally on the same page. Lack of...

Now we are finally on the same page. Lack of dynamics, squashed waveform like loudness wars is thermally demanding. Reference tracks with huge dynamic spikes is not. It's demanding on excursion...
Forum: DIY Speakers and Subs   11-09-2015, 07:24 PM
Replies: 276
Views: 9,118
Posted By diy speaker guy
Not sure if you realize this but if you guys...

Not sure if you realize this but if you guys didn't poke at me like you just did here I never would have entered this discussion. I never start this stuff, I only respond when crazy hype gets out of...
Forum: DIY Speakers and Subs   11-09-2015, 05:28 PM
Replies: 276
Views: 9,118
Posted By diy speaker guy
Burst data is very different than running...

Burst data is very different than running demanding material with 8000 watt peaks for long periods of time as was claimed. Bursts are fractions of a second.



I'm glad you are amused. You can...
Forum: DIY Speakers and Subs   11-09-2015, 05:14 PM
Replies: 276
Views: 9,118
Posted By diy speaker guy
The rotary sub is a readily available driver. It...

The rotary sub is a readily available driver. It has lots more displacement at low frequencies than the SI 24. I don't have cfm data for the rotary sub. I think I did at some point but it's really...
Forum: DIY Speakers and Subs   11-08-2015, 10:19 PM
Replies: 276
Views: 9,118
Posted By diy speaker guy
I'm not latching on to Le shift or treating it...

I'm not latching on to Le shift or treating it like Bl linearity. I'm repeatedly pointing out that the term Klippel verified has a very specific meaning that you don't seem to understand. it's a...
Showing results 1 to 25 of 651

 
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