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Forum: Audio Theory, Setup, and Chat   02-26-2017, 04:35 PM
Replies: 16
Views: 128
Posted By Bill Fitzmaurice
We're not psychic, fill in your profile....

We're not psychic, fill in your profile. :rolleyes:
Forum: Subwoofers, Bass, and Transducers   02-26-2017, 02:10 PM
Replies: 10
Views: 145
Posted By Bill Fitzmaurice
Subwoofer radiation is omni-directional, and any...

Subwoofer radiation is omni-directional, and any obstacle that's less than a wavelength in dimension said radiation simply goes around. A wavelength at 80Hz is 14 feet. At 20 Hz, 56 feet.
If I had...
Forum: Audio Theory, Setup, and Chat   02-26-2017, 02:01 PM
Replies: 16
Views: 128
Posted By Bill Fitzmaurice
Pictures of Elvis, or dogs playing cards, painted...

Pictures of Elvis, or dogs playing cards, painted on velvet? :rolleyes:
Seriously, large expanses of nothingness are acoustical non-starters.
Forum: Subwoofers, Bass, and Transducers   02-26-2017, 12:48 PM
Replies: 10
Views: 145
Posted By Bill Fitzmaurice
It's not a reflection if the couch is against the...

It's not a reflection if the couch is against the wall, so look for other reasons for a cancellation notch. Having both subs on the front wall would be my prime suspect.
Forum: Audio Theory, Setup, and Chat   02-26-2017, 12:44 PM
Replies: 16
Views: 128
Posted By Bill Fitzmaurice
I got mine here: ...

I got mine here:
https://www.blinds.com/c/cellular-shades/34
They're custom cut, very high quality. They ship from China but the transit time is a week or less.
Forum: Audio Theory, Setup, and Chat   02-26-2017, 12:34 PM
Replies: 16
Views: 128
Posted By Bill Fitzmaurice
+1. I have cellulars on my windows. In the winter...

+1. I have cellulars on my windows. In the winter I raise them during the day for more light and solar gain, but in summer I leave them down all the time, as it's bright enough without raising them,...
Forum: Subwoofers, Bass, and Transducers   02-26-2017, 09:56 AM
Replies: 10
Views: 177
Posted By Bill Fitzmaurice
That's the problem. The response of a speaker is...

That's the problem. The response of a speaker is dependent on both the driver and the enclosure. If the enclosure is designed to take advantage of cabin gain then it simply won't work well without...
Forum: Subwoofers, Bass, and Transducers   02-26-2017, 09:41 AM
Replies: 10
Views: 145
Posted By Bill Fitzmaurice
Chances are it's caused by a reflection off the...

Chances are it's caused by a reflection off the wall behind the LP. Is that distance in the vicinity of 6 feet?
Forum: DIY Speakers and Subs   02-26-2017, 09:38 AM
Replies: 2
Views: 53
Posted By Bill Fitzmaurice
The Qes/Qts are too high for best results in a...

The Qes/Qts are too high for best results in a horn.
Forum: Subwoofers, Bass, and Transducers   02-26-2017, 07:17 AM
Replies: 10
Views: 177
Posted By Bill Fitzmaurice
That's revealed when you software model the...

That's revealed when you software model the driver. The usual problem seen with car subs is that the user doesn't build their own cab after having software modeled the driver to find the best...
Forum: Subwoofers, Bass, and Transducers   02-25-2017, 02:08 PM
Replies: 10
Views: 177
Posted By Bill Fitzmaurice
I would assume the enclosure. There are drivers...

I would assume the enclosure. There are drivers with specs that can be used in a variety of enclosures for a variety of environments.
Forum: Audio Theory, Setup, and Chat   02-25-2017, 02:02 PM
Replies: 21
Views: 231
Posted By Bill Fitzmaurice
Measure the results with and without and then you...

Measure the results with and without and then you can tell us.
Forum: OLED Technology and Flat Panels General   02-25-2017, 01:55 PM
Replies: 83
Views: 2,037
Posted By Bill Fitzmaurice
That's the key. I didn't really need a new TV,...

That's the key. I didn't really need a new TV, but decided to possibly get one for the wi-fi apps. I looked at them in the showroom, and for the most part the 4K smart TVs were no better than my 1080...
Forum: Speakers   02-25-2017, 09:59 AM
Replies: 6
Views: 87
Posted By Bill Fitzmaurice
The speakers could rattle atop the table. You can...

The speakers could rattle atop the table. You can prevent that with rubber feet, self-stick felt pads, dinner table place mats, any number of methods, none of them expensive.
Forum: Subwoofers, Bass, and Transducers   02-25-2017, 07:08 AM
Replies: 10
Views: 177
Posted By Bill Fitzmaurice
Car subs rely on the high cabin gain that's...

Car subs rely on the high cabin gain that's realized from the very small interior dimensions of a car for low frequency extension. You might find a car sub driver will work adequately in the right...
Forum: Speakers   02-25-2017, 07:01 AM
Replies: 6
Views: 87
Posted By Bill Fitzmaurice
Spikes are used to give a better grip with carpet...

Spikes are used to give a better grip with carpet floors, so the speaker is less likely to move about. I guess you could use them if your shelf is carpeted. You can lift the speakers if you want to...
Forum: Speakers   02-25-2017, 06:53 AM
Replies: 3
Views: 58
Posted By Bill Fitzmaurice
Read this: ...

Read this:
http://ethanwiner.com/speaker_isolation.htm
Forum: Subwoofers, Bass, and Transducers   02-24-2017, 03:29 PM
Replies: 22
Views: 430
Posted By Bill Fitzmaurice
My best friend has a little 32 inch screen, and...

My best friend has a little 32 inch screen, and watching football it's just like being at the game...you need binoculars to see it. In any event, if your LP is between 3 and 10 feet from the back...
Forum: Subwoofers, Bass, and Transducers   02-24-2017, 01:46 PM
Replies: 22
Views: 430
Posted By Bill Fitzmaurice
The placement of the LP can be just as...

The placement of the LP can be just as responsible for nulls as the placement of the subs.
My LP is against the back wall. The rear surrounds are mounted on the wall, six inches below the ceiling,...
Forum: Speakers   02-24-2017, 01:37 PM
Replies: 4
Views: 117
Posted By Bill Fitzmaurice
Those jacks are for non-powered speakers. RCA...

Those jacks are for non-powered speakers. RCA jacks are for powered speakers, which most subs are. You probably need to run a separate RCA/RCA interconnect from the sub output of your AVR to your...
Forum: Subwoofers, Bass, and Transducers   02-24-2017, 12:54 PM
Replies: 18
Views: 200
Posted By Bill Fitzmaurice
That is a culprit. Adding more components can...

That is a culprit. Adding more components can create another loop.

By code the TV/sat cable ground must be tied to the service ground, and it usually is. The problem is the distance from that...
Forum: DIY Speakers and Subs   02-24-2017, 12:36 PM
Replies: 12
Views: 223
Posted By Bill Fitzmaurice
Before modeling software it was common for...

Before modeling software it was common for builders to put the crossover on the outside of the speaker, often on the back with the side panels extended to hide it, sometimes in it's own box, so they...
Forum: DIY Speakers and Subs   02-24-2017, 10:10 AM
Replies: 12
Views: 223
Posted By Bill Fitzmaurice
An active crossover doesn't directly interact...

An active crossover doesn't directly interact with the drivers.

Crossover design, like speaker design, is a lot easier than it used to be, thanks to modeling software. But just as with speaker...
Forum: Audio Theory, Setup, and Chat   02-24-2017, 08:33 AM
Replies: 6
Views: 112
Posted By Bill Fitzmaurice
+1. The very term 'passive pre-amp' is an...

+1. The very term 'passive pre-amp' is an oxymoron. If it's passive it does not amplify, not even to the extent that it can realize unity gain.
You would compare the output voltage of the sources...
Forum: Subwoofers, Bass, and Transducers   02-24-2017, 06:09 AM
Replies: 20
Views: 321
Posted By Bill Fitzmaurice
He obviously didn't train under Paul Klipsch....

He obviously didn't train under Paul Klipsch. :rolleyes:
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