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Forum: Audio theory, Setup and Chat   08-21-2014, 08:29 AM
Replies: 8
Views: 130
Posted By Bill Fitzmaurice
150Hz is closer to the actual. The reason why you...

150Hz is closer to the actual. The reason why you can sometimes directionally locate a sub with an 80Hz crossover is not only the harmonic content that makes its way past the LP filter, but also the...
Forum: Speakers   08-21-2014, 05:57 AM
Replies: 11
Views: 167
Posted By Bill Fitzmaurice
Using mains that go to 30Hz is wasted space and...

Using mains that go to 30Hz is wasted space and money when the load below 60Hz, if not 80Hz, is handled by the subs. Mains that go to just below the intended crossover frequency will be smaller, and...
Forum: Audio theory, Setup and Chat   08-20-2014, 07:18 PM
Replies: 594
Views: 8,489
Posted By Bill Fitzmaurice
You guys do realize that dr.bunk is a troll, and...

You guys do realize that dr.bunk is a troll, and that by feeding him you only keep him coming back for more? Put him on your ignore list, move on. Life's too short to waste a minute more on this dB....
Forum: DIY Speakers and Subs   08-20-2014, 04:44 PM
Replies: 13
Views: 267
Posted By Bill Fitzmaurice
You must be looking in the wrong places. A 1/4...

You must be looking in the wrong places. A 1/4 bit will heat up very quickly and give you burned cuts. Whiteside Router Bits is a good source.
Forum: Audio theory, Setup and Chat   08-20-2014, 02:44 PM
Replies: 594
Views: 8,489
Posted By Bill Fitzmaurice
IMO they're made by charlatans for the truly...

IMO they're made by charlatans for the truly deluded who take the concept of more money than brains to the nth degree.

Anyway Karen is well knowledgeable, and the entire interview of her and her...
Forum: Audio theory, Setup and Chat   08-20-2014, 09:20 AM
Replies: 8
Views: 130
Posted By Bill Fitzmaurice
That should usually be the case, as the Allison...

That should usually be the case, as the Allison Effect response notch is controlled by having the subs less than 1/4 wavelength from the rear wall, and the mains more than 1/4 wavelength away.

The...
Forum: Speakers   08-20-2014, 09:07 AM
Replies: 5
Views: 144
Posted By Bill Fitzmaurice
I don't use them at all. They're convenient if...

I don't use them at all. They're convenient if you're in the habit of disconnecting cables on a regular basis, otherwise they serve no particular purpose.
Forum: DIY Speakers and Subs   08-20-2014, 04:55 AM
Replies: 9
Views: 245
Posted By Bill Fitzmaurice
You will need to have the driver re-coned. In...

You will need to have the driver re-coned. In many cases re-coning is so close to the cost of replacing the driver that you're better off to do that instead, especially if you have to pay the cost of...
Forum: Audio theory, Setup and Chat   08-19-2014, 06:28 PM
Replies: 594
Views: 8,489
Posted By Bill Fitzmaurice
John Curl has some serious issues. Let's just say...

John Curl has some serious issues. Let's just say that he's one man that Will Rogers absolutely never met. :(
Forum: Audio theory, Setup and Chat   08-19-2014, 04:52 PM
Replies: 594
Views: 8,489
Posted By Bill Fitzmaurice
A spool of wire is a series inductor with a...

A spool of wire is a series inductor with a parallel capacitor. In other words, it's a low pass filter. Of course it causes a square wave to be rounded off, it's filtering out the harmonics that make...
Forum: Audio theory, Setup and Chat   08-19-2014, 03:09 PM
Replies: 594
Views: 8,489
Posted By Bill Fitzmaurice
They can be measured. :rolleyes: Claims about...

They can be measured. :rolleyes:
Claims about what can't be measured but can be heard/seen/felt come from those who should be saying that they don't know how to measure it. ;)
Forum: DIY Speakers and Subs   08-19-2014, 02:59 PM
Replies: 2
Views: 95
Posted By Bill Fitzmaurice
B. That way if anything you end up with slightly...

B. That way if anything you end up with slightly lower tuning if anything. If you want to hedge your bets use a point midway between A and B.
Forum: Speakers   08-19-2014, 02:55 PM
Replies: 9
Views: 234
Posted By Bill Fitzmaurice
Watch the TV news. Its content is basically mono,...

Watch the TV news. Its content is basically mono, so the imaging should come from the screen center. Keep in mind that if the L/R are close enough together to deliver a good phantom center they'll...
Forum: DIY Speakers and Subs   08-19-2014, 08:39 AM
Replies: 8
Views: 230
Posted By Bill Fitzmaurice
Hoffman's Iron Law: Low, small, sensitive. Pick...

Hoffman's Iron Law: Low, small, sensitive. Pick any two, but you can't have all three. In a car you might get 20Hz from a 1 cu ft sealed box with sufficient sensitivity to give adequate output,...
Forum: Audio theory, Setup and Chat   08-19-2014, 05:56 AM
Replies: 594
Views: 8,489
Posted By Bill Fitzmaurice
The first thing one learns in an advanced level...

The first thing one learns in an advanced level course in acoustics is that you don't know what you're hearing. I've yet to see a 'Golden Ear' listen to a speaker and then draw out an SPL chart,...
Forum: Audio theory, Setup and Chat   08-18-2014, 07:30 PM
Replies: 594
Views: 8,489
Posted By Bill Fitzmaurice
No, resistance would not be affected at all. ...

No, resistance would not be affected at all.
Resistance, capacitance, inductance. Those are the only factors that determine cable performance. The cost of wire that is as good as you can get, ie.,...
Forum: Audio theory, Setup and Chat   08-18-2014, 04:33 PM
Replies: 594
Views: 8,489
Posted By Bill Fitzmaurice
If your question is who cares what you spend your...

If your question is who cares what you spend your money on, the answer is no one. Recommending to someone else that they waste their money is a different matter entirely. When someone does so ad...
Forum: Speakers   08-18-2014, 04:20 PM
Replies: 16
Views: 327
Posted By Bill Fitzmaurice
Sd accounts for the surround, there's no...

Sd accounts for the surround, there's no subtraction to be made.
Forum: HDTV Programming   08-18-2014, 02:29 PM
Replies: 514
Views: 17,024
Posted By Bill Fitzmaurice
Good for some laughs though, especially for the...

Good for some laughs though, especially for the real CDC doctors, who are probably pissing themselves over the notion that a vaccine will result in antibody production within minutes sufficient to...
Forum: Audio theory, Setup and Chat   08-18-2014, 02:22 PM
Replies: 594
Views: 8,489
Posted By Bill Fitzmaurice
Coiling a wire completely alters its inductance...

Coiling a wire completely alters its inductance and capacitance. You can't measure coiled speaker wire and get a result that's even remotely close to an uncoiled wire of the same length. Since...
Forum: Audio theory, Setup and Chat   08-18-2014, 12:41 PM
Replies: 594
Views: 8,489
Posted By Bill Fitzmaurice
Watch this: ...

Watch this:
http://www.youtube.com/watch?v=BYTlN6wjcvQ
Forum: Speakers   08-18-2014, 12:25 PM
Replies: 4
Views: 86
Posted By Bill Fitzmaurice
OTOH I doubt if one in a thousand members here...

OTOH I doubt if one in a thousand members here owns or uses PA. Nearly all of those here do:
http://www.djforums.com/forums/forumdisplay.php?60-Amps-Speakers
Forum: Audio theory, Setup and Chat   08-18-2014, 08:45 AM
Replies: 594
Views: 8,489
Posted By Bill Fitzmaurice
Its amusing for awhile, to see Dunning-Kruger...

Its amusing for awhile, to see Dunning-Kruger Effect at work first hand, but after a few instances of multiple page long posts that don't actually say anything, or the same person posting anywhere...
Forum: Audio theory, Setup and Chat   08-18-2014, 05:10 AM
Replies: 594
Views: 8,489
Posted By Bill Fitzmaurice
No. The problems that they claim to cure don't...

No. The problems that they claim to cure don't exist. These, like the MIT do-dads, are but another useless item that appeal to the layman who doesn't have any understanding of how sound reproduction...
Forum: DIY Speakers and Subs   08-18-2014, 04:54 AM
Replies: 25
Views: 665
Posted By Bill Fitzmaurice
Not unless the parallel walls are at least 30...

Not unless the parallel walls are at least 30 inches or so apart.
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