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Search: Keyword(s): ; Posts Made By: diy speaker guy
Forum: DIY Speakers and Subs   07-02-2016, 12:48 PM
Replies: 43
Views: 895
Posted By diy speaker guy
I figured that, but just wanted to make it clear...

I figured that, but just wanted to make it clear for others that only the parameters that affect the electrical parts should be adjusted.
Forum: DIY Speakers and Subs   07-01-2016, 03:06 PM
Replies: 43
Views: 895
Posted By diy speaker guy
My adjusted curve fit for the ZV3 was Bl = 11.9. ...

My adjusted curve fit for the ZV3 was Bl = 11.9. (Only applicable when using the data-bass measured t/s.)

I'd be extremely wary of adjusting any parameters other than Bl to make the simulated...
Forum: DIY Speakers and Subs   07-01-2016, 01:04 AM
Replies: 43
Views: 895
Posted By diy speaker guy
Yes, the curve shape should be more accurate. ...

Yes, the curve shape should be more accurate. Add a couple db to the sensitivity level in the frequency response graph (since the tweaked sims in the study were consistently a couple db lower than...
Forum: DIY Speakers and Subs   06-30-2016, 11:18 PM
Replies: 100
Views: 3,069
Posted By diy speaker guy
Which option, the hyp/ex approximator? Click...

Which option, the hyp/ex approximator?

Click on S1 once to highlight it. Then click Tools, then Hypex Approximator.
Forum: DIY Speakers and Subs   06-30-2016, 08:58 PM
Replies: 43
Views: 895
Posted By diy speaker guy
Try the ZV3 in a flh. Remember the sims I showed...

Try the ZV3 in a flh. Remember the sims I showed you months ago with 4x ZV3 in 125 cu ft flh (that was exterior dimensions)? It looked pretty good even with inductance effects included in the sim. ...
Forum: DIY Speakers and Subs   06-30-2016, 08:42 PM
Replies: 100
Views: 3,069
Posted By diy speaker guy
There have been a bunch of really cool features...

There have been a bunch of really cool features added in the last few months. It pays to keep up with the Hornresp thread on diyaudio. He's made significant changes to the directivity tool recently...
Forum: DIY Speakers and Subs   06-30-2016, 05:14 PM
Replies: 43
Views: 895
Posted By diy speaker guy
I don't know the actual details of any of the...

I don't know the actual details of any of the coils in the drivers I studied (beyond vc diameter and sometimes number of layers and very rarely coil height) but if you fool around with an inductance...
Forum: DIY Speakers and Subs   06-30-2016, 04:16 PM
Replies: 43
Views: 895
Posted By diy speaker guy
The cause of the issue is unclear. I mean, it's...

The cause of the issue is unclear. I mean, it's clearly related to large voice coils and inductance has a scaled effect (higher normalized inductance = less simulation accuracy) but I have no...
Forum: DIY Speakers and Subs   06-30-2016, 03:55 PM
Replies: 43
Views: 895
Posted By diy speaker guy
The generic method involves adjusting the value...

The generic method involves adjusting the value of Bl. The formula for determining the new value of Bl to use in your sim is included in the paper linked in post 1. If you are using Hornresp you...
Forum: DIY Speakers and Subs   06-30-2016, 03:36 PM
Replies: 100
Views: 3,069
Posted By diy speaker guy
Everything makes a difference but room...

Everything makes a difference but room interaction is so complex that it's hard to tell exactly what's going to happen in any given situation. It's easy enough to predict with the theoretical...
Forum: DIY Speakers and Subs   06-30-2016, 12:55 PM
Replies: 100
Views: 3,069
Posted By diy speaker guy
Stacking 4 in close proximity (mouth to mouth)...

Stacking 4 in close proximity (mouth to mouth) should gain a bit extra sensitivity and extension at the low knee. Not a lot but a bit. Then if you can corner load the stack you gain a bit more...
Forum: DIY Speakers and Subs   06-30-2016, 12:51 PM
Replies: 100
Views: 3,069
Posted By diy speaker guy
That's been there since the paper was released,...

That's been there since the paper was released, McBean released the "Large Coil" tweak in Hornresp simultaneously with the release of the paper. You and McBean were instrumental in ironing out some...
Forum: DIY Speakers and Subs   06-17-2016, 10:03 PM
Replies: 55
Views: 1,526
Posted By diy speaker guy
Wow, you guys are all business. I didn't see...

Wow, you guys are all business. I didn't see anybody sit down for a second, just work work work. it would take me a week to do what you guys did in 42 seconds. (I attach one or two panels at a...
Forum: DIY Speakers and Subs   06-17-2016, 08:19 PM
Replies: 31
Views: 763
Posted By diy speaker guy
Yes, LTD02 is correct in a certain kind of way. ...

Yes, LTD02 is correct in a certain kind of way. But let's look at some real facts and see how this plays out.

First let's examine the real size of an IB. You stated a couple of times that IB...
Forum: DIY Speakers and Subs   06-17-2016, 11:50 AM
Replies: 31
Views: 763
Posted By diy speaker guy
This is missing the forest for the trees.. ...

This is missing the forest for the trees..

Vd is the ONLY thing that matters for a sealed box design wrt max output (within reason). If you are able to get to your excursion limits with...
Forum: DIY Speakers and Subs   06-15-2016, 03:57 PM
Replies: 31
Views: 763
Posted By diy speaker guy
Yes, this. Making sealed boxes several hundred...

Yes, this. Making sealed boxes several hundred or thousand liters doesn't make sense.

The "4x Vas" ting is a recommended minimum. It's for people that want to try IB that have maybe a small...
Forum: DIY Speakers and Subs   06-15-2016, 11:52 AM
Replies: 31
Views: 763
Posted By diy speaker guy
That indicates moderate/high qts and...

That indicates moderate/high qts and moderate/high Vas. If Vas is moderate/high the suspension is pretty compliant, indicating that the suspension is not intended to provide a cushion like a box air...
Forum: DIY Speakers and Subs   06-14-2016, 09:46 PM
Replies: 31
Views: 763
Posted By diy speaker guy
Not really. Subs marketed for use in IB tend to...

Not really. Subs marketed for use in IB tend to be high(ish) .5 - .7 qts, which implies not a lot of control over cone motion. To replace the air spring with physical components would imply a very...
Forum: DIY Speakers and Subs   06-14-2016, 09:40 PM
Replies: 31
Views: 763
Posted By diy speaker guy
No it's not. If you have too much power and...

No it's not. If you have too much power and can't control yourself (volume knob, limiter, etc) you are going to hit excursion limits or thermal limits in any size of box unless the amp is very...
Forum: DIY Speakers and Subs   06-14-2016, 11:20 AM
Replies: 136
Views: 2,163
Posted By diy speaker guy
I remembered correctly, here's Danley's actual...

I remembered correctly, here's Danley's actual quote -



From here - http://www.diyaudio.com/forums/subwoofers/235954-infra-sonic-subwoofer-design-2.html#post3492266
Forum: DIY Speakers and Subs   06-14-2016, 11:14 AM
Replies: 136
Views: 2,163
Posted By diy speaker guy
As the other guy pointed out "psychoacoustic" is...

As the other guy pointed out "psychoacoustic" is the wrong word. It's the physical properties of slot ports that slightly lower the tuning, this has nothing to do with psychoacoustics, which is...
Forum: DIY Speakers and Subs   06-13-2016, 09:17 PM
Replies: 31
Views: 763
Posted By diy speaker guy
This question was just covered a couple of days...

This question was just covered a couple of days ago in the DS4 thread, and I'll say it again. When it comes to sealed boxes, and especially with this type of driver, if you can afford the space...
Forum: DIY Speakers and Subs   06-13-2016, 11:47 AM
Replies: 136
Views: 2,163
Posted By diy speaker guy
Yes, Hornresp uses fs and cms to calculate moving...

Yes, Hornresp uses fs and cms to calculate moving mass. I don't know the formula but I'm sure it's pretty simple. So a simple mass and spring model is probably what is used to calculate moving mass...
Forum: DIY Speakers and Subs   06-13-2016, 09:22 AM
Replies: 136
Views: 2,163
Posted By diy speaker guy
Those would be way over budget, and even Danley...

Those would be way over budget, and even Danley has described his current modern tapped horns as much more powerful than the old servo subs.
Forum: DIY Speakers and Subs   06-13-2016, 09:20 AM
Replies: 136
Views: 2,163
Posted By diy speaker guy
I don't know the math behind the PR simulations,...

I don't know the math behind the PR simulations, and I'm not sure if any of the 1/4 wave software even covers PRs. Akabak might but Hornresp and TL.app don't. So the lumped element mass and spring...
Showing results 1 to 25 of 816

 
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