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Forum: DIY Speakers and Subs   02-09-2017, 11:59 AM
Replies: 141
Views: 2,034
Posted By bwaslo
Ah, yes, the "Mick Jagger" look!

Ah, yes, the "Mick Jagger" look!
Forum: DIY Speakers and Subs   02-08-2017, 01:28 PM
Replies: 49
Views: 1,199
Posted By bwaslo
I think one big factor about reflections has to...

I think one big factor about reflections has to do with how hearing differs from measurement microphones -- ears, brains, and necks form a damn efficient directional sensor (not just by the shape of...
Forum: DIY Speakers and Subs   02-07-2017, 07:49 PM
Replies: 49
Views: 1,199
Posted By bwaslo
Having reflection come from more off-axis isn't a...

Having reflection come from more off-axis isn't a bad thing, particulary if it is sufficiently delayed (something like 15msec or more is good). IMO it adds envelopment and makes it seem more as if...
Forum: DIY Speakers and Subs   02-02-2017, 10:55 PM
Replies: 141
Views: 2,034
Posted By bwaslo
One way it to use smaller ports of not too much...

One way it to use smaller ports of not too much length, might be difficult if you plan to play loud though. Or put a little damping at the end of the port if it has to be long (the damping will cut...
Forum: DIY Speakers and Subs   02-02-2017, 10:51 PM
Replies: 141
Views: 2,034
Posted By bwaslo
Hi Steve, I'm partial to waveguide sound,...

Hi Steve,

I'm partial to waveguide sound, myself (though I hate the sound of exponential horns). Ribbons can be nice but don't play as well with the room acoustics (waveguides give directivity in...
Forum: DIY Speakers and Subs   01-22-2017, 01:39 PM
Replies: 4
Views: 119
Posted By bwaslo
Just speculation here, I'm afraid. I've never...

Just speculation here, I'm afraid. I've never tried that particular driver, but I don't see any reason it shouldn't work well on a SEOS or 152i. Both are really nice waveguides and that is supposed...
Forum: DIY Speakers and Subs   12-22-2016, 05:23 PM
Replies: 3
Views: 124
Posted By bwaslo
8 ohm driver.

8 ohm driver.
Forum: DIY Speakers and Subs   12-12-2016, 05:49 PM
Replies: 30
Views: 639
Posted By bwaslo
Tom (or actually, it was his business partner)...

Tom (or actually, it was his business partner) wasn't open to the idea as of about 4yrs ago. But the Unity patent is indeed expired (due to lack of maintenance fees), possibly because the assignee...
Forum: DIY Speakers and Subs   11-17-2016, 11:46 AM
Replies: 39
Views: 829
Posted By bwaslo
Bubble wrap is something my cats won't get on or...

Bubble wrap is something my cats won't get on or near
Forum: DIY Speakers and Subs   11-02-2016, 03:09 PM
Replies: 417
Views: 9,763
Posted By bwaslo
As those horns are constant directivity, you...

As those horns are constant directivity, you might want to try a magnitude response that slopes down about a dB or two per octave rather than dead-flat. Unless you use custom mastered recordings, a...
Forum: DIY Speakers and Subs   10-04-2016, 11:16 PM
Replies: 1,195
Views: 29,425
Posted By bwaslo
OK, I broke down and got the 12" Pro T-Rule,...

OK, I broke down and got the 12" Pro T-Rule, decent price on it at Amazon. (Decent for a precision laser-milled tool, insane for a ruler in general, though I guess). Arrived yesterday, looks very...
Forum: DIY Speakers and Subs   09-29-2016, 08:17 PM
Replies: 1,195
Views: 29,425
Posted By bwaslo
I'm trying to resist ordering the 12" Pro version...

I'm trying to resist ordering the 12" Pro version (doesn't come in an 18" version). The attraction is that it also has decimal inches (1/100ths), I don't think well in 1/2^Nths of an inch!
Forum: DIY Speakers and Subs   09-06-2016, 10:19 PM
Replies: 565
Views: 21,152
Posted By bwaslo
Well, solves some, but causes some, too. That...

Well, solves some, but causes some, too. That back reflection from around the cabinet is something to be dealt with (except for the case when the speaker can be mounted IN the wall... but that's...
Forum: DIY Speakers and Subs   09-06-2016, 03:53 PM
Replies: 565
Views: 21,152
Posted By bwaslo
The back wall thing is just realization of the...

The back wall thing is just realization of the reality all my situations have been, and what I always see -- people with speakers designed for out in the room, but in fact placed right next to a wall...
Forum: DIY Speakers and Subs   09-06-2016, 02:51 PM
Replies: 565
Views: 21,152
Posted By bwaslo
Another factor is setup. Because of limitations...

Another factor is setup. Because of limitations of my available rooms (and of most other rooms I've seen people use!), anymore I always design for speaker placement near or right at the wall behind...
Forum: DIY Speakers and Subs   09-01-2016, 01:49 PM
Replies: 565
Views: 21,152
Posted By bwaslo
So it doesn't use constant directivity...

So it doesn't use constant directivity compensation (a ~6dB/oct rise starting around 3kHz on a 1" CD?). Maybe it's the chosen voicing?
Forum: DIY Speakers and Subs   08-17-2016, 09:43 PM
Replies: 28
Views: 672
Posted By bwaslo
Since the compression drivers (with their horns)...

Since the compression drivers (with their horns) have slide-on/off terminals, try changing the drivers and horns between speakers, see if the muted sound follows the crossover or the compression...
Forum: DIY Speakers and Subs   08-16-2016, 07:28 PM
Replies: 6
Views: 143
Posted By bwaslo
Put the omnimic in FFT/RTA mode (tab named...

Put the omnimic in FFT/RTA mode (tab named "SPL/Spectrum"). Shoot the gun near the mic, look at the plot.

The difficulties will be:
1) Catching the shot on-screen and pausing the system at...
Forum: DIY Speakers and Subs   08-04-2016, 10:17 PM
Replies: 336
Views: 7,667
Posted By bwaslo
I'd like to give a data point, but I can't quite...

I'd like to give a data point, but I can't quite do that since the data was in a computer about 20 years ago, so I guess it's just a testimonial without graphs or numbers. Sample size of 1 box, too....
Forum: DIY Speakers and Subs   07-16-2016, 03:15 PM
Replies: 41
Views: 1,363
Posted By bwaslo
That image bugs hell out of me - ...

That image bugs hell out of me -
http://i1234.photobucket.com/albums/ff416/1Reference1/800D2/DSC_1744.jpg

That's an awful lot of fancy gear to then go and set the uncontrolled-directivity...
Forum: Speakers   06-30-2016, 12:54 AM
Replies: 91
Views: 2,313
Posted By bwaslo
A problem with questions like this is that a...

A problem with questions like this is that a speaker doesn't have "A" response curve. Unlike an amplifier channel that has a single pair of output terminals where you can measure the response at,...
Forum: DIY Speakers and Subs   06-29-2016, 11:09 PM
Replies: 9
Views: 289
Posted By bwaslo
Perhaps this handy flowchart will help:

Perhaps this handy flowchart will help:
Forum: DIY Speakers and Subs   06-28-2016, 04:02 PM
Replies: 565
Views: 21,152
Posted By bwaslo
Dammit. And now I live on the west coast and...

Dammit. And now I live on the west coast and can't get to this...
Forum: DIY Speakers and Subs   06-25-2016, 12:47 PM
Replies: 33
Views: 1,685
Posted By bwaslo
The article is mine. I'll agree with Mfusick...

The article is mine. I'll agree with Mfusick that "try it yourself" is the best answer. Even if you have to install your speakers in walls, it's worth setting them up first on top of some stools or...
Forum: DIY Speakers and Subs   05-26-2016, 08:56 PM
Replies: 2,198
Views: 193,922
Posted By bwaslo
That's kind of opposite of the issue most people...

That's kind of opposite of the issue most people have had with Win8, but a couple of things needed when running in Win 8:
1) Actually, this is neeeded in all Windows; go to the system audio...
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