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Forum: Subwoofers, Bass, and Transducers   02-25-2017, 02:08 PM
Replies: 10
Views: 186
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: 2,081
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: 186
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: 225
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: 225
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:
Forum: Subwoofers, Bass, and Transducers   02-23-2017, 02:53 PM
Replies: 6
Views: 81
Posted By Bill Fitzmaurice
Subs used with AVRs must be self-amplified. If...

Subs used with AVRs must be self-amplified. If the sub you have doesn't have an AC cord to plug it into a wall outlet it's not self-amplified.
Forum: Subwoofers, Bass, and Transducers   02-23-2017, 02:50 PM
Replies: 18
Views: 200
Posted By Bill Fitzmaurice
From what I see on the SVS site their...

From what I see on the SVS site their interconnects have two conductors, hot and ground, so not having the shield connected at one end would not break a ground loop. By and large single conductor...
Forum: Speakers   02-23-2017, 01:19 PM
Replies: 10
Views: 96
Posted By Bill Fitzmaurice
My 4KSUHD TV is happy with my cheap Sony receiver.

My 4KSUHD TV is happy with my cheap Sony receiver.
Forum: Subwoofers, Bass, and Transducers   02-23-2017, 12:39 PM
Replies: 2
Views: 52
Posted By Bill Fitzmaurice
An amp rated 200 watts into 8 ohms will deliver...

An amp rated 200 watts into 8 ohms will deliver 40 volts. If you series wire a pair of 4 ohm transducers that 40 volts will be split as 20 volts each, which is 100 watts into each 4 ohm load. That...
Forum: Subwoofers, Bass, and Transducers   02-23-2017, 12:31 PM
Replies: 18
Views: 200
Posted By Bill Fitzmaurice
If the cable shield is only connected at one end...

If the cable shield is only connected at one end to prevent the shield from acting as an antenna the end with the shield connected should go on the sending jack, not the receiving jack. Note that...
Forum: Speakers   02-23-2017, 12:12 PM
Replies: 10
Views: 96
Posted By Bill Fitzmaurice
Most speakers can't make use of more than 1/2...

Most speakers can't make use of more than 1/2 their rated power before the drivers run out of excursion and start distorting. Even if they can make use of the extra power the difference in output...
Forum: Subwoofers, Bass, and Transducers   02-23-2017, 10:32 AM
Replies: 22
Views: 430
Posted By Bill Fitzmaurice
It does. With larger subs if they're faced out...

It does. With larger subs if they're faced out that can cause a cancellation. It's not unusual for subs to work better aimed at the wall or placed sideways.
Forum: Subwoofers, Bass, and Transducers   02-23-2017, 10:29 AM
Replies: 18
Views: 200
Posted By Bill Fitzmaurice
Use your old cable. Since it wasn't broken you...

Use your old cable. Since it wasn't broken you shouldn't have tried to fix it. :)
The point of the article is that ground loop noise isn't caused by the lack of grounding, it's caused by too many...
Forum: DIY Speakers and Subs   02-23-2017, 10:24 AM
Replies: 12
Views: 173
Posted By Bill Fitzmaurice
With REW I can't say. I can tell you that even in...

With REW I can't say. I can tell you that even in a suburban setting you can go outside and measure 50-55dB ambient right down to 20Hz and lower, mostly road noise that can be coming from miles away....
Forum: DIY Speakers and Subs   02-23-2017, 09:31 AM
Replies: 12
Views: 173
Posted By Bill Fitzmaurice
Long long ago someone way smarter than me...

Long long ago someone way smarter than me invented the solution to that problem. They call it 'The Wheel'. :)
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