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Search: Posts Made By: diy speaker guy
Forum: DIY Speakers and Subs   04-25-2015, 10:11 PM
Replies: 93
Views: 1,338
Posted By diy speaker guy
Data-bass doesn't measure xmax, all they can...

Data-bass doesn't measure xmax, all they can measure is distortion, so I guess they could kinda work their way back into an xmax spec but you really need a klippel for that.

It's clear that the SI...
Forum: DIY Speakers and Subs   04-25-2015, 09:53 PM
Replies: 93
Views: 1,338
Posted By diy speaker guy
I don't think he does. I'm sure he's not going...

I don't think he does. I'm sure he's not going to come out and say it but his measurements tell the whole story. The SI HT18 measures very close to the Dayton 18HO. The SI published xmax is...
Forum: DIY Speakers and Subs   04-25-2015, 09:24 PM
Replies: 23
Views: 310
Posted By diy speaker guy
Quick 5 minute sim (not optimized in any way),...

Quick 5 minute sim (not optimized in any way), probably pretty similar to Submaximus although I didn't check. To get it to this level takes 140 V, which is 6100 watts into 3.2 ohms, although it...
Forum: DIY Speakers and Subs   04-25-2015, 08:13 PM
Replies: 23
Views: 310
Posted By diy speaker guy
It looks fairly good in flh as small as 500...

It looks fairly good in flh as small as 500 liters but takes a lot more amp voltage to get it to xmax. Or you can use it without high pass filter and then it doesn't take much power at all to hit...
Forum: DIY Speakers and Subs   04-25-2015, 06:48 PM
Replies: 23
Views: 310
Posted By diy speaker guy
Submaximus and most of the front loaded horns...

Submaximus and most of the front loaded horns don't have those big 15 db spikes and swings. That's a tapped horn thing for the most part, although some front loaded horns are really badly designed....
Forum: DIY Speakers and Subs   04-25-2015, 06:35 PM
Replies: 341
  HzHorn
Views: 9,443
Posted By diy speaker guy
"Better" would be a better word than "optimal". ...

"Better" would be a better word than "optimal". When it comes to horns optimal is only reached when you get to full size, and full size is really really big. For 35 hz it's like 5000 liters, it's...
Forum: DIY Speakers and Subs   04-25-2015, 06:18 PM
Replies: 23
Views: 310
Posted By diy speaker guy
Redesign, not refold. Redesign CAN be a lot...

Redesign, not refold.

Redesign CAN be a lot more complex than what you went through with Hzhorn. There's a lot of factors you may or may not have considered with the Hzhorn design. You didn't go...
Forum: DIY Speakers and Subs   04-25-2015, 06:09 PM
Replies: 93
Views: 1,338
Posted By diy speaker guy
The commercial folks are not likely to pick these...

The commercial folks are not likely to pick these drivers up quickly. These drivers for the most part are conceived, made and sold to the car audio market. The only high excursion manufacturers...
Forum: DIY Speakers and Subs   04-25-2015, 06:00 PM
Replies: 93
Views: 1,338
Posted By diy speaker guy
Modern high power high excursion drivers are a...

Modern high power high excursion drivers are a lot different than anything that was being produced 20 years ago. And it's not a revelation for people that measure. The only reason I even know about...
Forum: DIY Speakers and Subs   04-25-2015, 05:45 PM
Replies: 23
Views: 310
Posted By diy speaker guy
http://i62.tinypic.com/2isfww0.png Light...

http://i62.tinypic.com/2isfww0.png

Light line is a regular sim with UXL in Ghorn. Dark line is inductance corrected sim with UXL in Ghorn.

This is the 4th time I've posted this sim in the last...
Forum: DIY Speakers and Subs   04-22-2015, 08:30 PM
Replies: 93
Views: 1,338
Posted By diy speaker guy
Ok, I see where you are coming from, and I think...

Ok, I see where you are coming from, and I think you see my perspective. So I just deleted all that stuff.

As far as the specific part I quoted, I did my best to show you what you want to see. I...
Forum: DIY Speakers and Subs   04-22-2015, 06:28 PM
Replies: 93
Views: 1,338
Posted By diy speaker guy
I'll make an attempt to smooth things over before...

I'll make an attempt to smooth things over before it blows up and goes way OT.

I haven't seen you much on this forum, but on other forums your comments are generally very on point. I agree with...
Forum: DIY Speakers and Subs   04-22-2015, 05:58 PM
Replies: 93
Views: 1,338
Posted By diy speaker guy
My sims match measurements. If yours don't you...

My sims match measurements. If yours don't you are doing it wrong.



Even a full sized ideal horn is just a series of resonances. If you look at the impedance graph (measured or simulated)...
Forum: DIY Speakers and Subs   04-22-2015, 10:23 AM
Replies: 93
Views: 1,338
Posted By diy speaker guy
Maybe but probably not. In the ultra high...

Maybe but probably not.

In the ultra high excursion category there are only a limited amount of choices. There's TC, which is good for inductance control but is unavailable and extremely...
Forum: DIY Speakers and Subs   04-22-2015, 09:27 AM
Replies: 93
Views: 1,338
Posted By diy speaker guy
It's not just marketing terms. Traditional horn...

It's not just marketing terms. Traditional horn have a very strict definition and there are very specific mathematical formulas describing how to design one. Traditionally they are huge and have a...
Forum: DIY Speakers and Subs   04-21-2015, 05:22 PM
Replies: 128
Views: 2,831
Posted By diy speaker guy
I'd take that chart with a grain of salt. I'm...

I'd take that chart with a grain of salt. I'm not sure bending stiffness and bending strength are actual units that can be compared to modulus of elasticity and regular stiffness specs.

Also they...
Forum: DIY Speakers and Subs   04-21-2015, 04:33 PM
Replies: 93
Views: 1,338
Posted By diy speaker guy
Probably, but you would have to create a whole...

Probably, but you would have to create a whole simulator and then add the tweak.

It would probably be easier to create a whole simulator that accepted complex inductance parameters instead. Then...
Forum: DIY Speakers and Subs   04-21-2015, 04:30 PM
Replies: 93
Views: 1,338
Posted By diy speaker guy
The procedure I used for ALL the high inductance...

The procedure I used for ALL the high inductance drivers was to double Re and add power to compensate for the losses. This will get pretty close but it's not 100 percent accurate.

You could...
Forum: DIY Speakers and Subs   04-21-2015, 12:54 PM
Replies: 93
Views: 1,338
Posted By diy speaker guy
The modeling is already pretty accurate, I've...

The modeling is already pretty accurate, I've shown a bunch of different examples that were already pretty accurate, and it's only gotten more accurate since then. If you have a contribution that...
Forum: DIY Speakers and Subs   04-21-2015, 08:39 AM
Replies: 93
Views: 1,338
Posted By diy speaker guy
This part deserves it's own post. The accuracy...

This part deserves it's own post. The accuracy and especially the relevance of simulators has never been in question. There's thousands of examples of sims that match measurements in this forum...
Forum: DIY Speakers and Subs   04-21-2015, 08:35 AM
Replies: 93
Views: 1,338
Posted By diy speaker guy
Didn't read the recommended reading, eh? I used...

Didn't read the recommended reading, eh? I used EXACTLY the same tweak with a couple dozen sims, about a dozen drivers in a bunch of different enclosures and it worked for ALL of them. I have...
Forum: DIY Speakers and Subs   04-21-2015, 08:17 AM
Replies: 66
Views: 1,491
Posted By diy speaker guy
Sometimes. But if you insist on pushing it...

Sometimes.

But if you insist on pushing it well past xmax you are going to have trouble sooner or later either way, those parts wear out, they are not meant to be mechanical brakes. If you need...
Forum: DIY Speakers and Subs   04-21-2015, 07:27 AM
Replies: 66
Views: 1,491
Posted By diy speaker guy
Not at the low knee (around tuning). Xmax is...

Not at the low knee (around tuning). Xmax is xmax. It's the point where you are supposed to stop. True, at higher frequencies there's still plenty left in the tank (very low excursion) and you can...
Forum: DIY Speakers and Subs   04-21-2015, 06:06 AM
Replies: 66
Views: 1,491
Posted By diy speaker guy
They are shown at xmax (in all cases except pic...

They are shown at xmax (in all cases except pic 4, I didn't bother to check excursion level on that graph).

If I show them at max power the driver will last a fraction of a second before self...
Forum: DIY Speakers and Subs   04-21-2015, 05:57 AM
Replies: 93
Views: 1,338
Posted By diy speaker guy
The simulation software is not wrong. Ultra high...

The simulation software is not wrong. Ultra high excursion drivers with ultra high inductance are a relatively new thing. David McBean has been working on Hornresp for probably 50 years now and...
Showing results 1 to 25 of 523

 
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