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Search: Posts Made By: diy speaker guy
Forum: DIY Speakers and Subs   08-27-2015, 07:36 AM
Replies: 23
Views: 369
Posted By diy speaker guy
That's the statement that you originally disagree...

That's the statement that you originally disagree with. When the word "usually" is used it's not a global assertion. The following post from me to clarify uses the word "usually" and "typically"...
Forum: DIY Speakers and Subs   08-26-2015, 03:17 PM
Replies: 23
Views: 369
Posted By diy speaker guy
That's fine with me if you want to run your pro...

That's fine with me if you want to run your pro drivers so hard the coil comes right out of the gap. That doesn't make pro drivers the same as high displacement drivers.

The B&C 21sw152-4 is...
Forum: DIY Speakers and Subs   08-26-2015, 06:43 AM
Replies: 23
Views: 369
Posted By diy speaker guy
Published Xmech or Xlim is typically much larger...

Published Xmech or Xlim is typically much larger than 20 mm, that is correct, but there's a big technicality here. Published Xmech is usually reported as the distance the cone must travel before it...
Forum: DIY Speakers and Subs   08-24-2015, 06:26 PM
Replies: 23
Views: 369
Posted By diy speaker guy
The TC Pro 5100 is an even more extreme example...

The TC Pro 5100 is an even more extreme example of a driver that is not affected by this issue. It's got rising response up to 100 hz (no inductance hump) in it's small sealed box as measured by...
Forum: DIY Speakers and Subs   08-24-2015, 06:08 PM
Replies: 23
Views: 369
Posted By diy speaker guy
The Dayton UM has normalized inductance (Le/Re)...

The Dayton UM has normalized inductance (Le/Re) of .36. Dayton HO has .4, MTX 9515 has .4. These are remarkably low, yet all 3 have this issue. Maybe you are right, maybe they do have incredibly...
Forum: DIY Speakers and Subs   08-24-2015, 02:25 PM
Replies: 23
Views: 369
Posted By diy speaker guy
I'm not a driver designer and I've never done an...

I'm not a driver designer and I've never done an in depth study into specific drivers and the parts you can't see that make up these drivers. I don't have full voice coil info on any of the drivers...
Forum: DIY Speakers and Subs   08-24-2015, 11:40 AM
Replies: 23
Views: 369
Posted By diy speaker guy
The type of drivers studied are considerably...

The type of drivers studied are considerably different in just about every way than "normal" or pro drivers. Pro drivers max out at around 14mm xmax and usually won't move past 20mm. This type of...
Forum: DIY Speakers and Subs   08-24-2015, 10:58 AM
Replies: 23
Views: 369
Posted By diy speaker guy
Thanks again to you for your very important...

Thanks again to you for your very important contributions. The adjustment method and the write up are both better because of your involvement.
Forum: DIY Speakers and Subs   08-24-2015, 09:37 AM
Replies: 23
Views: 369
Posted By diy speaker guy
https://sites.google.com/site/amateuraudio/theory/...

https://sites.google.com/site/amateuraudio/theory/large-coil-simulation-accuracy-issue-and-adjustment

Larger coils need more adjustment.

I suspect the pro drivers are using larger diameter...
Forum: DIY Speakers and Subs   08-24-2015, 08:14 AM
Replies: 23
Views: 369
Posted By diy speaker guy
Large Coil Simulation Accuracy Issue and Adjustment

Without adjustment, Hornresp and other programs don't accurately simulate drivers with very large voice coils. With a minor adjustment most of the variation can be eliminated.

Previously thought...
Forum: DIY Speakers and Subs   08-14-2015, 12:32 PM
Replies: 50
Views: 862
Posted By diy speaker guy
Entering ... fs vas qes qms ......

Entering ...

fs
vas
qes
qms

... will always give different results than entering ...

cms
Forum: DIY Speakers and Subs   08-10-2015, 10:00 AM
Replies: 37
Views: 735
Posted By diy speaker guy
Not sure what you mean, but the simple (regular)...

Not sure what you mean, but the simple (regular) sim is not even vaguely accurate while the adjusted sim shows pretty good correlation to the measurement. Ricci posted measurements of a bunch of...
Forum: DIY Speakers and Subs   08-10-2015, 05:26 AM
Replies: 37
Views: 735
Posted By diy speaker guy
I credit Geddes too, he's a very smart guy. But...

I credit Geddes too, he's a very smart guy. But as you showed, sometimes his quotes require a bit of explanation. Room gain does exist (even if some people do mix up room modes and room gain) and...
Forum: DIY Speakers and Subs   08-09-2015, 12:47 PM
Replies: 37
Views: 735
Posted By diy speaker guy
He's a smart guy but well known for his very...

He's a smart guy but well known for his very pointed very narrow perspective. He's argued that room gain doesn't exist.

There's always at least a grain of truth to everything he says but you have...
Forum: DIY Speakers and Subs   08-09-2015, 12:36 PM
Replies: 37
Views: 735
Posted By diy speaker guy
I'm not saying Ricci's sub is bad just that it...

I'm not saying Ricci's sub is bad just that it doesn't measure as a sim (from any simulator) would indicate across it's entire bandwidth and that's a direct result of the large coil and to some...
Forum: DIY Speakers and Subs   08-09-2015, 12:15 PM
Replies: 37
Views: 735
Posted By diy speaker guy
You can look at the info that's already been...

You can look at the info that's already been posted or you can ignore it, it's up to you. Data doesn't lie.



From this perspective it's not really necessary to simulate anything (much less...
Forum: DIY Speakers and Subs   08-09-2015, 11:58 AM
Replies: 37
Views: 735
Posted By diy speaker guy
Just a quick example - go to data-bass and look...

Just a quick example - go to data-bass and look at the big 34.5 cu ft RE XXX ported box. He gives you MEASURED t/s parameters and the box details. Sim that box with the measured t/s parameters. ...
Forum: DIY Speakers and Subs   08-09-2015, 11:36 AM
Replies: 37
Views: 735
Posted By diy speaker guy
Which point? I've got tons of info to back...

Which point?

I've got tons of info to back me up, lots in the thread I mentioned WITH sims correlated to measurements.

My new forthcoming info is even more comprehensive, 22 drivers simulated...
Forum: DIY Speakers and Subs   08-09-2015, 08:30 AM
Replies: 37
Views: 735
Posted By diy speaker guy
It affects the entire bandwidth especially the...

It affects the entire bandwidth especially the low end. There's a bunch of info already including sims vs measurements. Probably the best resource so far is buried in the HzHorn thread, a hundred...
Forum: DIY Speakers and Subs   08-08-2015, 10:06 AM
Replies: 37
Views: 735
Posted By diy speaker guy
Almost half the drivers on data-bass won't...

Almost half the drivers on data-bass won't measure as a sim would indicate due to their very large VCs. Inductance is also a factor but only with drivers of this type with very large coils. There's...
Forum: DIY Speakers and Subs   06-29-2015, 02:45 PM
Replies: 255
Views: 3,963
Posted By diy speaker guy
Yeah, that's why I questioned the specs of all...

Yeah, that's why I questioned the specs of all the drivers, they are all rated on just the Bl curve and ignore all the other Klippel defined limitations. It's not easy to make a good motor, and SI...
Forum: DIY Speakers and Subs   06-29-2015, 12:41 PM
Replies: 255
Views: 3,963
Posted By diy speaker guy
Not conjecture at all. If SI ONLY uses the Bl...

Not conjecture at all. If SI ONLY uses the Bl curve to determine xmax it's almost 100 percent certain that all their high excursion products are rated well above what a real Klippel test (with all 4...
Forum: DIY Speakers and Subs   06-29-2015, 10:33 AM
Replies: 255
Views: 3,963
Posted By diy speaker guy
The same incorrect claims were made here again,...

The same incorrect claims were made here again, that's what was responded to. There was plenty of time to clear this up in any number of previous threads, but when the discussion turns technical the...
Forum: DIY Speakers and Subs   06-29-2015, 08:37 AM
Replies: 255
Views: 3,963
Posted By diy speaker guy
http://www.diyaudio.com/forums/subwoofers/240775-s...

http://www.diyaudio.com/forums/subwoofers/240775-stereo-integrity-24-ib-subwoofer-new-displacement-king-subwoofers-7.html#post3602649

Not sure exactly what you are asking for here, but there's the...
Forum: DIY Speakers and Subs   06-28-2015, 08:15 PM
Replies: 255
Views: 3,963
Posted By diy speaker guy
Testing at 70 percent Bl is fine. Ignoring the...

Testing at 70 percent Bl is fine. Ignoring the other factors that influence a true Klippel verified result is not fine. If you want to claim "Klippel verified" it has to follow Klippel's rules.
...
Showing results 1 to 25 of 596

 
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