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Search: Posts Made By: Bill Fitzmaurice
Forum: Speakers   05-23-2015, 03:16 PM
Replies: 6
Views: 60
Posted By Bill Fitzmaurice
If it's a typical pro sound speaker they're...

If it's a typical pro sound speaker they're parallel wired, for daisy chaining. You'd seldom, if ever, find dual Speakons for the purpose of bi-amping. For that use 4 pole Speakons are employed.
Forum: DIY Speakers and Subs   05-23-2015, 01:44 PM
Replies: 6
Views: 104
Posted By Bill Fitzmaurice
It shouldn't have one. Unlike a ported enclosure,...

It shouldn't have one. Unlike a ported enclosure, or for that matter most sealed cabs, excursion does not rise below the 22Hz corner frequency, it goes down. That's why there's no mention of a HPF in...
Forum: Speakers   05-23-2015, 01:32 PM
Replies: 7
Views: 140
Posted By Bill Fitzmaurice
By and large, no. The reason for towers being...

By and large, no. The reason for towers being large and having large drivers is to provide output below 80Hz. That doesn't mean you'll get what you want from bookshelves loaded with one five and a...
Forum: Speakers   05-23-2015, 11:11 AM
Replies: 6
Views: 60
Posted By Bill Fitzmaurice
You need to either buy or make a cable with the...

You need to either buy or make a cable with the correct Speakon at one end and the appropriate connector, or bare ends, at the other to go to your Denon.
Forum: Subwoofers, Bass, and Transducers   05-23-2015, 07:07 AM
Replies: 35
Views: 627
Posted By Bill Fitzmaurice
They shouldn't. Flat in-room response is flat...

They shouldn't. Flat in-room response is flat in-room response. If it's a very well done system they might sound different in that the in-room response is flat, whereas most home systems are not. Of...
Forum: Audio Theory, Setup, and Chat   05-23-2015, 06:57 AM
Replies: 5
Views: 53
Posted By Bill Fitzmaurice
It will work. However, I'm not a fan of having...

It will work. However, I'm not a fan of having surrounds at ear level. Surrounds, unlike mains, work best when they don't have precise imaging. You'll usually get the best results from them when wall...
Forum: Speakers   05-23-2015, 06:53 AM
Replies: 2
Views: 35
Posted By Bill Fitzmaurice
Sell them to someone who can use them. With an 8...

Sell them to someone who can use them. With an 8 ohm rated receiver, or for that matter any receiver not rated for 3 ohm loads, you can't use them.
BTW, the Sony is probably rated for 6 ohms, it...
Forum: Subwoofers, Bass, and Transducers   05-22-2015, 07:26 PM
Replies: 35
Views: 627
Posted By Bill Fitzmaurice
+1. There must be a fair amount of phase shift...

+1. There must be a fair amount of phase shift and/or arrival time between what the two ears hear for directional triangulation to occur. That can't happen with wavelengths in excess of roughly 10...
Forum: Audio Theory, Setup, and Chat   05-22-2015, 07:09 PM
Replies: 37
Views: 306
Posted By Bill Fitzmaurice
Damp concrete is just as much a problem as damp...

Damp concrete is just as much a problem as damp ground. The only drill I still use that is corded is a rotary hammer. Double insulated, of course. :)
Forum: Speakers   05-22-2015, 03:00 PM
Replies: 12
Views: 217
Posted By Bill Fitzmaurice
There's no such thing as free shipping, it's...

There's no such thing as free shipping, it's included in the price, even though it's not itemized. UPS/FedEx etc. make it a habit of getting paid for their services, and one way or another it comes...
Forum: Audio Theory, Setup, and Chat   05-22-2015, 02:02 PM
Replies: 37
Views: 306
Posted By Bill Fitzmaurice
Neutral is at ground at the service entrance. As...

Neutral is at ground at the service entrance. As I explained above it will not be at a significant distance from the service entrance. One reason for the use of GFI outlets is that in a kitchen or...
Forum: Audio Theory, Setup, and Chat   05-22-2015, 11:44 AM
Replies: 37
Views: 306
Posted By Bill Fitzmaurice
You would not be able to sell a drill like that...

You would not be able to sell a drill like that today. If the case isn't connected to a third wire ground then the case must not be made of a conductive material. But until roughly the early 1970s...
Forum: Subwoofers, Bass, and Transducers   05-22-2015, 05:59 AM
Replies: 35
Views: 627
Posted By Bill Fitzmaurice
What you're hearing coming from the center and...

What you're hearing coming from the center and side is above 80Hz. The bass fills the room and you can't tell where the source is. The higher frequency information that you can directionally locate,...
Forum: Audio Theory, Setup, and Chat   05-22-2015, 05:36 AM
Replies: 37
Views: 306
Posted By Bill Fitzmaurice
You can run into the same issue with a 3 wire...

You can run into the same issue with a 3 wire system when the distance from the chassis to the service ground is too long. One common example is outdoors. For instance, you're using a 50 foot...
Forum: Subwoofers, Bass, and Transducers   05-21-2015, 08:03 PM
Replies: 4
Views: 133
Posted By Bill Fitzmaurice
That's not a review, it's thinly veiled...

That's not a review, it's thinly veiled advertising. The chart is a joke. It doesn't show what it supposedly does below 100Hz where subs work. The reason? It doesn't do anything.
Forum: Subwoofers, Bass, and Transducers   05-21-2015, 07:56 PM
Replies: 35
Views: 627
Posted By Bill Fitzmaurice
They may be large but chances are they don't go...

They may be large but chances are they don't go below 60Hz, if that low. They're probably high sensitivity pro-sound woofers that trade off low frequency response for high output. They use those...
Forum: DIY Speakers and Subs   05-21-2015, 07:52 PM
Replies: 7
Views: 105
Posted By Bill Fitzmaurice
The U15 works very well in 16 cu ft (net) with...

The U15 works very well in 16 cu ft (net) with 16Hz tuning, which gives very flat response and a 15Hz f3. If you go smaller it has a response hump in the low end, and the smaller you go the worse the...
Forum: Subwoofers, Bass, and Transducers   05-21-2015, 12:06 PM
Replies: 4
Views: 133
Posted By Bill Fitzmaurice
Floors are the same as eardrums. They vibrate in...

Floors are the same as eardrums. They vibrate in response to the long wavelength low frequency waves produced by the movement of the driver cone. Nothing placed under the sub will stop that.
Forum: Subwoofers, Bass, and Transducers   05-21-2015, 11:59 AM
Replies: 35
Views: 627
Posted By Bill Fitzmaurice
With a few exceptions commercial theaters aren't...

With a few exceptions commercial theaters aren't all that good. Most don't go below 30Hz, because the subwoofer size, subwoofer count and required power is too expensive for the size rooms that they...
Forum: DIY Speakers and Subs   05-21-2015, 11:52 AM
Replies: 20
Views: 243
Posted By Bill Fitzmaurice
I've always found WinISD to be quite accurate....

I've always found WinISD to be quite accurate. That's after designing, building and measuring a few hundred speakers.
Forum: Subwoofers, Bass, and Transducers   05-21-2015, 05:53 AM
Replies: 37
Views: 635
Posted By Bill Fitzmaurice
You only get that by running at very high levels,...

You only get that by running at very high levels, in excess of 105dB at the LP. That requires both large subs and multiple subs. It also means having the overall level that high or it's not going to...
Forum: Subwoofers, Bass, and Transducers   05-21-2015, 05:48 AM
Replies: 2
Views: 48
Posted By Bill Fitzmaurice
That probably indicates a fault in the amp.

That probably indicates a fault in the amp.
Forum: Speakers   05-20-2015, 01:53 PM
Replies: 2
Views: 41
Posted By Bill Fitzmaurice
Fully enclosed in-walls can work better than...

Fully enclosed in-walls can work better than bookshelves or floorstanders, as flush mounting eliminates cancellations caused by Allison Effect. The downside is that most can't be toe'd in. They...
Forum: Subwoofers, Bass, and Transducers   05-20-2015, 11:13 AM
Replies: 13
Views: 256
Posted By Bill Fitzmaurice
OTOH my band was practicing in a basement,...

OTOH my band was practicing in a basement, concrete floor, no protection. We got a direct hit on the house. I felt a decidedly unpleasant tingle through the strings on my guitar. The only damage...
Forum: DIY Speakers and Subs   05-20-2015, 08:23 AM
Replies: 14
Views: 163
Posted By Bill Fitzmaurice
Not necessarily. I have a gun with a large 2mm...

Not necessarily. I have a gun with a large 2mm nozzle, which works fine with latex paint. Used with a metallic acrylic lacquer, standard auto paint, the color is mottled with severe orange peel. With...
Showing results 1 to 25 of 5000

 
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