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Search: Keyword(s): ; Posts Made By: bwaslo
Forum: DIY Speakers and Subs   07-16-2016, 02:15 PM
Replies: 41
Views: 1,098
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   06-29-2016, 11:54 PM
Replies: 91
Views: 2,107
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, 10:09 PM
Replies: 9
Views: 265
Posted By bwaslo
Perhaps this handy flowchart will help:

Perhaps this handy flowchart will help:
Forum: DIY Speakers and Subs   06-28-2016, 03:02 PM
Replies: 435
Views: 13,919
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, 11:47 AM
Replies: 33
Views: 1,472
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, 07:56 PM
Replies: 2,192
Views: 192,634
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...
Forum: DIY Speakers and Subs   05-18-2016, 01:07 PM
Replies: 120
Views: 3,238
Posted By bwaslo
The impulse test or phase response can be fixed,...

The impulse test or phase response can be fixed, though, using an FIR EQ. Probably a lot cheaper and definitely smaller than subs that go sub 10Hz!

On the full-range vs. upper-range-with-subs...
Forum: DIY Speakers and Subs   03-26-2016, 11:46 AM
Replies: 49
Views: 1,237
Posted By bwaslo
Fully agree, there. But my experience is...

Fully agree, there.

But my experience is different than yours, I'm still waiting to hear a direct radiator system that has the detail and timbre of a Synergy horn or full range ESL
Forum: DIY Speakers and Subs   03-25-2016, 09:12 PM
Replies: 49
Views: 1,237
Posted By bwaslo
To me, the chambering is an advantage for the...

To me, the chambering is an advantage for the midrange, you get a bandpass filter that filters after the driver's distortion instead of before. And the tweeter doesn't drive much of its energy...
Forum: DIY Speakers and Subs   03-25-2016, 02:12 PM
Replies: 49
Views: 1,237
Posted By bwaslo
Hi Mayhem, Compression loading with taps...

Hi Mayhem,

Compression loading with taps (two ports, one driver). The hardest part was finding a reasonable way to get a flat surface to mount the driver on and determining good port hole sizes...
Forum: DIY Speakers and Subs   03-24-2016, 05:57 PM
Replies: 49
Views: 1,237
Posted By bwaslo
I've been working on a Unity-ish thing, with a 1"...

I've been working on a Unity-ish thing, with a 1" tweeter and a single offset-mounted 4" midrange in a SEOS15 waveguide. Have those two going pretty well (and pretty easy to do, once I got it...
Forum: DIY Speakers and Subs   03-23-2016, 07:20 PM
Replies: 49
Views: 1,237
Posted By bwaslo
For home use, the DE250 and it's clones do ok...

For home use, the DE250 and it's clones do ok even lower than that. Not for use in clubs or PAs though. There are others who disagree, of course.
Forum: DIY Speakers and Subs   03-13-2016, 02:00 PM
Replies: 3,650
Views: 217,218
Posted By bwaslo
M88, Do you realize how loud 130dBSPL is? ...

M88,

Do you realize how loud 130dBSPL is? If you got it doing that at least once, then you could save a LOT of money on audio equipment as your hearing would be permanently and forever shot.
Forum: DIY Speakers and Subs   02-19-2016, 03:00 PM
Replies: 64
Views: 2,188
Posted By bwaslo
Should be able to. I'm about to do some testing...

Should be able to. I'm about to do some testing on just that subject. I'm also working on adding "Unity" drivers to pull the next lower driver close enough to the SEOS center to act like a wideband...
Forum: DIY Speakers and Subs   02-18-2016, 03:47 PM
Replies: 86
Views: 2,636
Posted By bwaslo
If REW can use a cal file for the particular mic,...

If REW can use a cal file for the particular mic, and correct for or set some standard 'gain' (really a conversion factor, not a gain) setting in Windows then it should be able to work ok.
...
Forum: DIY Speakers and Subs   02-18-2016, 12:17 PM
Replies: 86
Views: 2,636
Posted By bwaslo
I don't think that takes care of it, unless your...

I don't think that takes care of it, unless your umik1 states what the fullscale digital level (bits) is in Pascals (pressure, or some equivalent) and REW knows how to take that into account, and...
Forum: DIY Speakers and Subs   02-17-2016, 11:39 PM
Replies: 86
Views: 2,636
Posted By bwaslo
If at 110dB, it likely isn't mic compression,...

If at 110dB, it likely isn't mic compression, though it could be. But the system has to be actually level calibrated in some way (an spl calibrator is a good way, or hardware/software that keep...
Forum: DIY Speakers and Subs   02-17-2016, 02:34 PM
Replies: 55
Views: 2,339
Posted By bwaslo
Should work fine for most rooms. The waveguide...

Should work fine for most rooms. The waveguide will set the directivity (assuming the tweeter is attached well), and the SPL efficiency of a compression driver isn't likely needed at ear-healthy...
Forum: DIY Speakers and Subs   02-17-2016, 01:22 PM
Replies: 86
Views: 2,636
Posted By bwaslo
Well, the Omnimic sweeps show levels below that,...

Well, the Omnimic sweeps show levels below that, so should be ok. The others, would need to have a level calibration of some kind to know what the absolute SPL level was.
Forum: DIY Speakers and Subs   02-17-2016, 12:54 PM
Replies: 86
Views: 2,636
Posted By bwaslo
Careful running these tests with typical USB...

Careful running these tests with typical USB measurement mics (Umik, OmniMic) or other low voltage electret mics (MiteyMike, Behrenger types). These typically compress at 120dBSPL or less, so make...
Forum: DIY Speakers and Subs   02-17-2016, 12:48 PM
Replies: 86
Views: 2,636
Posted By bwaslo
Originally Posted by Sampsoise Yes. ...

Originally Posted by Sampsoise

Yes. Anything containing multiple frequencies (pink noise has THOUSANDS) will generate some IMD
Forum: DIY Speakers and Subs   02-17-2016, 12:23 PM
Replies: 55
Views: 2,339
Posted By bwaslo
The (or one) trouble with most wide dispersion...

The (or one) trouble with most wide dispersion designs using a small tweeter is that they are seldom wide dispersion over a continuous range, so the tweeter tends to sound like a tweeter playing,...
Forum: DIY Speakers and Subs   12-30-2015, 10:25 PM
Replies: 2,192
Views: 192,634
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...
Forum: DIY Speakers and Subs   12-28-2015, 10:34 PM
Replies: 170
Views: 4,312
Posted By bwaslo
This will probably come of as arrogant and...

This will probably come of as arrogant and condescending to some people, but I think that the reasons people play around with swapping cables and power cords are because
(1) they want to change...
Forum: DIY Speakers and Subs   12-07-2015, 09:26 PM
Replies: 1,279
Views: 84,714
Posted By bwaslo
You may at some time find yourself saying "what...

You may at some time find yourself saying "what did you say?" a lot in conversation....
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