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Forum: Subwoofers, Bass, and Transducers   04-01-2015, 11:40 AM
Replies: 17
  Auralex
Views: 195
Posted By Bill Fitzmaurice
The only scientific test I know of is my own,...

The only scientific test I know of is my own, which showed no difference in the pass through of low frequencies with and without isolation. That includes Auralex. One would think that if they really...
Forum: Subwoofers, Bass, and Transducers   04-01-2015, 09:36 AM
Replies: 17
  Auralex
Views: 195
Posted By Bill Fitzmaurice
A better analogy is that a low frequency source...

A better analogy is that a low frequency source acts like a pump inflating a balloon, with the balloon expanding in all directions. The rock in the pond analogy only examines two dimensions, whereas...
Forum: Subwoofers, Bass, and Transducers   04-01-2015, 07:56 AM
Replies: 17
  Auralex
Views: 195
Posted By Bill Fitzmaurice
Vibrations are caused by low frequency sound...

Vibrations are caused by low frequency sound waves, which are sourced by the movement of the driver cone. So-called isolation devices do not affect production of low frequency sound waves, nor do...
Forum: HDTV Programming   03-30-2015, 03:48 PM
Replies: 267
Views: 5,711
Posted By Bill Fitzmaurice
It doesn't seem that way. I guess the writers...

It doesn't seem that way. I guess the writers don't know that without electricity gas pumps don't work, no matter how much there is in the underground tanks.
I give it one season, if that. But I...
Forum: Speakers   03-30-2015, 09:04 AM
Replies: 6
Views: 128
Posted By Bill Fitzmaurice
Are you using a sub? If not be sure the speakers...

Are you using a sub? If not be sure the speakers are set to large, otherwise the receiver isn't sending lows to the speakers. Read the manual as to how to set it up using only L/R speakers.
Forum: DIY Speakers and Subs   03-30-2015, 06:08 AM
Replies: 3
Views: 80
Posted By Bill Fitzmaurice
+1. Outdoor measurements are useful when you need...

+1. Outdoor measurements are useful when you need to create a half-space anechoic chart and don't happen to have an anechoic chamber handy. In-room is used to find the best speaker locations,...
Forum: Speakers   03-29-2015, 03:15 PM
Replies: 5
Views: 144
Posted By Bill Fitzmaurice
The only information you'll find on-line is a few...

The only information you'll find on-line is a few youtube videos. They're either White Van or Rent-A-Center. If there was an actual Pro Studio speaker company they'd have a website.
Forum: Speakers   03-28-2015, 12:41 PM
Replies: 5
Views: 144
Posted By Bill Fitzmaurice
Is the brand Pro Studio? Those are White Van...

Is the brand Pro Studio? Those are White Van speakers. You should have left it where you found it, sorry,
Forum: DIY Speakers and Subs   03-28-2015, 07:15 AM
Replies: 6
Views: 114
Posted By Bill Fitzmaurice
Where to measure depends on your intent....

Where to measure depends on your intent. Nearfield is fine for comparison purposes, in room is best for eqing to the room and finding the best placement, outdoors groundplane is for when you want a...
Forum: Audio Theory, Setup, and Chat   03-28-2015, 07:06 AM
Replies: 304
Views: 4,765
Posted By Bill Fitzmaurice
With respect to the linked in bio, I opened that...

With respect to the linked in bio, I opened that account quite a few years ago, when I was trying to reconnect with an old college flame and that was the only way to contact her. The only information...
Forum: Audio Theory, Setup, and Chat   03-27-2015, 05:44 AM
Replies: 304
Views: 4,765
Posted By Bill Fitzmaurice
That also can happen. It's why most amps cannot...

That also can happen. It's why most amps cannot deliver twice the power into a halved impedance load. Those that can typically have very robust power supplies. That, or they understate their actual...
Forum: Audio Theory, Setup, and Chat   03-27-2015, 05:35 AM
Replies: 11
Views: 144
Posted By Bill Fitzmaurice
+1. True bi-amping does the signal splitting...

+1. True bi-amping does the signal splitting before the amplification, and has no passive crossovers in the speakers. Since so called 'passive bi-amping' does neither the very term 'passive...
Forum: Audio Theory, Setup, and Chat   03-26-2015, 08:54 PM
Replies: 304
Views: 4,765
Posted By Bill Fitzmaurice
That simply indicates that the lower rated amp...

That simply indicates that the lower rated amp wasn't able to deliver the required voltage swing to drive the speaker to full output. For example, consider a speaker that requires 40 volts to reach...
Forum: Audio Theory, Setup, and Chat   03-26-2015, 01:02 PM
Replies: 304
Views: 4,765
Posted By Bill Fitzmaurice
Consider the source. I personally don't put much...

Consider the source. I personally don't put much stock in someone who sells overly expensive gear saying that you must buy overly expensive gear.
+1, which applies to everything from more damping...
Forum: Audio Theory, Setup, and Chat   03-26-2015, 09:06 AM
Replies: 304
Views: 4,765
Posted By Bill Fitzmaurice
+1. What matters isn't the power rating, it's the...

+1. What matters isn't the power rating, it's the load rating. I see this all the time in the pro-sound realm, where the uninformed routinely bridge their power amps to get as much power as possible,...
Forum: Audio Theory, Setup, and Chat   03-26-2015, 05:58 AM
Replies: 304
Views: 4,765
Posted By Bill Fitzmaurice
Pure unadulterated bunk. Power does not 'control'...

Pure unadulterated bunk. Power does not 'control' a speaker. Some speakers draw more current than others, because they present lower impedance loads. This ain't rocket science. :rolleyes:
Forum: DIY Speakers and Subs   03-26-2015, 05:44 AM
Replies: 6
Views: 134
Posted By Bill Fitzmaurice
On axis, yes, but where your crossover point is...

On axis, yes, but where your crossover point is concerned it's off-axis that matters. I'd want to see the 45 degree off-axis chart before deciding on how high to try and take it.
Forum: Audio Theory, Setup, and Chat   03-26-2015, 05:34 AM
Replies: 304
Views: 4,765
Posted By Bill Fitzmaurice
+1. When SS amps came along and it was noted how...

+1. When SS amps came along and it was noted how high their damping factor was when compared to tubes it didn't take long for the marketeers to get into the act and start proclaiming how that made SS...
Forum: DIY Speakers and Subs   03-25-2015, 12:38 PM
Replies: 5
Views: 134
Posted By Bill Fitzmaurice
Different drivers won't have much effect, so long...

Different drivers won't have much effect, so long as the specs are comparable.
Forum: Audio Theory, Setup, and Chat   03-25-2015, 12:34 PM
Replies: 304
Views: 4,765
Posted By Bill Fitzmaurice
Possibly, but not likely. SS adherents make a big...

Possibly, but not likely. SS adherents make a big deal about the high damping factor of SS, but in practice it makes little, if any difference. ...
Forum: DIY Speakers and Subs   03-25-2015, 05:30 AM
Replies: 5
Views: 134
Posted By Bill Fitzmaurice
Different horns will have widely varying phase...

Different horns will have widely varying phase response, making integrating them difficult.
Forum: Audio Theory, Setup, and Chat   03-24-2015, 07:54 PM
Replies: 19
Views: 281
Posted By Bill Fitzmaurice
EQ can't fix dispersion, and dispersion is the...

EQ can't fix dispersion, and dispersion is the reason why multiple driver sizes are used.
Forum: Audio Theory, Setup, and Chat   03-24-2015, 03:22 PM
Replies: 43
Views: 995
Posted By Bill Fitzmaurice
11 feet. If I walk to the screen I'll notice the...

11 feet. If I walk to the screen I'll notice the shift of the CC image around 6 feet out.
Forum: Audio Theory, Setup, and Chat   03-24-2015, 03:01 PM
Replies: 43
Views: 995
Posted By Bill Fitzmaurice
I can't, nor have anyone else who've heard my...

I can't, nor have anyone else who've heard my system, and my center is not only below the screen but it's two feet off-center as well.
Forum: Speakers   03-24-2015, 02:56 PM
Replies: 24
Views: 482
Posted By Bill Fitzmaurice
It probably can't properly decode all the current...

It probably can't properly decode all the current formats, many of which didn't exist 15 years ago.
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