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Forum: DIY Speakers and Subs   03-22-2017, 05:30 PM
Replies: 40
Views: 563
Posted By diy speaker guy
The rabbit hole goes deep. The following is an...

The rabbit hole goes deep. The following is an earlier post of mine copied and pasted from one of the previous ISCT threads.



Doing a quick search for ISCT, UpperCut Audio, Roland E W Mucke...
Forum: DIY Speakers and Subs   03-21-2017, 11:14 PM
Replies: 40
Views: 563
Posted By diy speaker guy
I do know it's some type of bandpass made with a...

I do know it's some type of bandpass made with a translam construction.



There is audio theory, which for the most part is not incorrect. There is also some room for art. But assuming you are...
Forum: DIY Speakers and Subs   03-21-2017, 09:51 PM
Replies: 40
Views: 563
Posted By diy speaker guy
I would love to but the only information on your...

I would love to but the only information on your speakers is what you've posted on several forums (hundreds of posts and a few pictures of your translam speakers) and in the many ads you have all...
Forum: DIY Speakers and Subs   03-21-2017, 06:32 PM
Replies: 40
Views: 563
Posted By diy speaker guy
Why do you keep posting about it if you don't...

Why do you keep posting about it if you don't want to talk about it?

Why are you advertising these products for sale if the "sealed/vented" idea is still a "halve cooked chicken" not ready to even...
Forum: DIY Speakers and Subs   02-21-2017, 07:06 AM
Replies: 67
Views: 1,239
Posted By diy speaker guy
If you want to bench race different drivers with...

If you want to bench race different drivers with a simulator you have to know how the specs were derived. There is no standard to define xmax and there are at least 6 different ways that different...
Forum: DIY Speakers and Subs   02-03-2017, 01:08 PM
Replies: 8
Views: 202
Posted By diy speaker guy
You will get vastly more spl from a ported box. ...

You will get vastly more spl from a ported box. This should be common sense.

This has nothing at all to do with frequency extension. You tune your box to the lowest notes you want to play and...
Forum: DIY Speakers and Subs   01-30-2017, 07:41 PM
Replies: 0
Views: 44
Posted By diy speaker guy
Hornresp low frequency limit defeated by new Resize Wizard

Hornresp has neat new feature, the Resize Wizard. The calculations are provided by Bjorn Kolbrek and of course implemented into Hornresp by David McBean.

A resized design will have both the...
Forum: DIY Speakers and Subs   01-28-2017, 06:26 PM
Replies: 11
Views: 282
Posted By diy speaker guy
Again, just for clarity it's usable excursion not...

Again, just for clarity it's usable excursion not "useful xmax". The quote you pulled even says so. The xmax as per Dayton's standard is defined by the traditional coil and gap measurements. ...
Forum: DIY Speakers and Subs   01-28-2017, 04:54 PM
Replies: 11
Views: 282
Posted By diy speaker guy
Not sure what you are looking for but when you...

Not sure what you are looking for but when you have a situation where manufacturers are using several different methods to specify xmax and almost none of those methods have much to do with actual...
Forum: DIY Speakers and Subs   01-28-2017, 02:16 PM
Replies: 11
Views: 282
Posted By diy speaker guy
Now to actually answer your question, the xmax is...

Now to actually answer your question, the xmax is supposed to relate to the 10 percent distortion point for that driver. As I showed, based on B&C's xmax vs xvar specs, there is a loose correlation...
Forum: DIY Speakers and Subs   01-28-2017, 02:05 PM
Replies: 11
Views: 282
Posted By diy speaker guy
If anyone is interested and wants the long form...

If anyone is interested and wants the long form answer that is condensed in the last post look here -...
Forum: DIY Speakers and Subs   01-28-2017, 01:53 PM
Replies: 11
Views: 282
Posted By diy speaker guy
There's a big difference between xmax and usable...

There's a big difference between xmax and usable excursion. You are using the terms interchangeably. They are most certainly not interchangeable. For example, B&C gives an xmax and an xvar rating....
Forum: DIY Speakers and Subs   01-26-2017, 12:34 PM
Replies: 21
Views: 600
Posted By diy speaker guy
Here is one example, there's more examples if you...

Here is one example, there's more examples if you search. This is the Danley CS30, Danley's only ported box. It's like your example #3....
Forum: DIY Speakers and Subs   01-24-2017, 03:09 PM
Replies: 1,329
Views: 54,646
Posted By diy speaker guy
Anyway, like most everyone else I greatly...

Anyway, like most everyone else I greatly appreciate what Not is doing here. If I'm not mistaken his results line up pretty well with other 3rd party measurements of the same products. I don't even...
Forum: DIY Speakers and Subs   01-24-2017, 01:51 PM
Replies: 1,329
Views: 54,646
Posted By diy speaker guy
Well now you gave him another reason to be mad. ...

Well now you gave him another reason to be mad. These guys were swearing Bosso's amps are not clones, remember?
Forum: DIY Speakers and Subs   01-20-2017, 01:50 PM
Replies: 16
Views: 296
Posted By diy speaker guy
Ok, first of all, when you are using a resonant...

Ok, first of all, when you are using a resonant enclosure the efficiency comes mostly from the enclosure, not from the driver. A driver's sensitivity (which is usually specified in the midrange...
Forum: DIY Speakers and Subs   01-18-2017, 04:24 PM
Replies: 3
Views: 84
Posted By diy speaker guy
There's a lot of things going on in the DTS 10...

There's a lot of things going on in the DTS 10 throat but the horn does not have smoother frequency response by virtue of having drivers on opposite sides.

The DTS 10 might have slightly smoother...
Forum: DIY Speakers and Subs   01-18-2017, 04:21 PM
Replies: 3
Views: 84
Posted By diy speaker guy
That's one option. Another option would be...

That's one option.

Another option would be to make the cab depth deep enough to have them side by side but still at the same point in the horn flare length.

Another option would be to line them...
Forum: DIY Speakers and Subs   01-10-2017, 08:20 PM
Replies: 36
Views: 603
Posted By diy speaker guy
The Hornresp Large Coil option should do a pretty...

The Hornresp Large Coil option should do a pretty good job at getting a more accurate sim than ignoring lossy inductance. It's not perfect but it's a lot better than nothing. The exact curve fit...
Forum: DIY Speakers and Subs   01-10-2017, 01:42 PM
Replies: 36
Views: 603
Posted By diy speaker guy
Danley alone has a bunch of subs that go below 20...

Danley alone has a bunch of subs that go below 20 hz and they are all a LOT smaller than OP says he has room for. There are several published designs that go well below 20 hz that are available here...
Forum: DIY Speakers and Subs   01-06-2017, 03:03 PM
Replies: 271
  SKHorn
Views: 9,431
Posted By diy speaker guy
For what? The driver or a cnc enclosure? If...

For what? The driver or a cnc enclosure?

If you are talking about the driver I don't think a group buy will go very far. Most of the group buys are done directly with the manufacturer or from...
Forum: DIY Speakers and Subs   12-29-2016, 07:39 PM
Replies: 271
  SKHorn
Views: 9,431
Posted By diy speaker guy
I don't really understand your questions so let...

I don't really understand your questions so let me say this - The schematic is showing the rear chamber (the largest circle), the rear chamber port (the smallest circle), the driver (the medium size...
Forum: DIY Speakers and Subs   12-29-2016, 04:14 PM
Replies: 271
  SKHorn
Views: 9,431
Posted By diy speaker guy
Yeah, what LTD said. Hornresp says...

Yeah, what LTD said.

Hornresp says "axisymmetric" because everything in Hornresp is round. The schematic shows pictures of chambers, ducts and waveguides and they are all round. Therefore the...
Forum: DIY Speakers and Subs   12-29-2016, 11:33 AM
Replies: 271
  SKHorn
Views: 9,431
Posted By diy speaker guy
Very large, that's where the efficiency comes...

Very large, that's where the efficiency comes from. As shown it's about 820 liters, add another 20 - 25 percent to account for wood and bracing. Also note that it's shown at 35 volts which is...
Forum: DIY Speakers and Subs   12-24-2016, 07:44 AM
Replies: 38
Views: 1,052
Posted By diy speaker guy
There's a bunch of different factors at play but...

There's a bunch of different factors at play but none of it is that complicated. Reflection timing (early vs late), reflection intensity, speaker design (controlled directivity or not) and I would...
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