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Search: Posts Made By: Bill Fitzmaurice
Forum: Subwoofers, Bass, and Transducers   04-24-2015, 08:50 AM
Replies: 11
Views: 205
Posted By Bill Fitzmaurice
The number of breakers doesn't matter, the...

The number of breakers doesn't matter, the assumption being you'll not run all of them at capacity at the same time.
FWIW standard practice for decades has been to wire outlet circuits at 20a, using...
Forum: DIY Speakers and Subs   04-22-2015, 11:20 AM
Replies: 9
Views: 151
Posted By Bill Fitzmaurice
You have to model the box at the maximum power...

You have to model the box at the maximum power level you intend to run at, then look at the rear port velocity. Use as much vent area as required to keep the velocity less than 20 within the pass...
Forum: DIY Speakers and Subs   04-22-2015, 05:58 AM
Replies: 9
Views: 151
Posted By Bill Fitzmaurice
You entered too much information. WinISD...

You entered too much information. WinISD calculates to a higher degree of accuracy than manufacturer data sheets, so if you enter all the data sheet information WinISD will find the data sheet...
Forum: Speakers   04-22-2015, 05:48 AM
Replies: 6
Views: 101
Posted By Bill Fitzmaurice
+1, and nothing loves high humidity more than...

+1, and nothing loves high humidity more than mold. Large daytime to night time temperature swings make matters worse, so insulating to minimize temperature swing is key to protecting your gear.
Forum: Speakers   04-21-2015, 01:59 PM
Replies: 15
Views: 396
Posted By Bill Fitzmaurice
For the most part speakers cost the dealer...

For the most part speakers cost the dealer between 40 and 60 percent of the suggested retail. The markup depends on how much volume the seller does. The higher the volume the lower the markup they...
Forum: Subwoofers, Bass, and Transducers   04-21-2015, 09:56 AM
Replies: 6
Views: 166
Posted By Bill Fitzmaurice
Making money. :cool:

Making money. :cool:
Forum: Audio Theory, Setup, and Chat   04-21-2015, 09:50 AM
Replies: 9
Views: 112
Posted By Bill Fitzmaurice
Mine does. My old cable box inexplicably sent the...

Mine does. My old cable box inexplicably sent the video via HDMI but the audio via analog stereo. The TV converted the audio to digital and sent it out the optical, but there was some latency. My...
Forum: Audio Theory, Setup, and Chat   04-21-2015, 05:38 AM
Replies: 9
Views: 112
Posted By Bill Fitzmaurice
Because the standard input sources for TV are...

Because the standard input sources for TV are cable boxes, DVR and DVD, which all have HDMI outputs. TVs have optical outs because most AVRs have optical inputs.
Where computers are concerned...
Forum: DIY Speakers and Subs   04-20-2015, 07:16 PM
Replies: 53
Views: 764
Posted By Bill Fitzmaurice
+1. It could be the tinsel wires beating on the...

+1. It could be the tinsel wires beating on the cone.
Forum: Subwoofers, Bass, and Transducers   04-20-2015, 04:47 PM
Replies: 42
Views: 651
Posted By Bill Fitzmaurice
No, but for the last 40 odd years all of the...

No, but for the last 40 odd years all of the information in the bass range, 100Hz and lower, has been summed to mono in the mixing process. It's been that long since recording engineers and...
Forum: DIY Speakers and Subs   04-20-2015, 12:58 PM
Replies: 53
Views: 764
Posted By Bill Fitzmaurice
I'd have to see it to venture an opinion.

I'd have to see it to venture an opinion.
Forum: DIY Speakers and Subs   04-20-2015, 12:08 PM
Replies: 53
Views: 764
Posted By Bill Fitzmaurice
I never have panels wider than 8 inches unbraced....

I never have panels wider than 8 inches unbraced. That doesn't mean that the driver might not be at fault, but it also could indicate that the panel the driver is mounted on is vibrating, making it...
Forum: DIY Speakers and Subs   04-19-2015, 04:47 PM
Replies: 53
Views: 764
Posted By Bill Fitzmaurice
That pretty much says it all.

That pretty much says it all.
Forum: DIY Speakers and Subs   04-19-2015, 03:08 PM
Replies: 53
Views: 764
Posted By Bill Fitzmaurice
I assume that means it's a tapped horn. That...

I assume that means it's a tapped horn. That would have no bearing on what you're hearing. It could be driver sourced, perhaps a surround that's separating, it could be from insufficient bracing of...
Forum: Subwoofers, Bass, and Transducers   04-18-2015, 07:04 PM
Replies: 1
Views: 48
Posted By Bill Fitzmaurice
The Hsu sub amps already have a low pass filter,...

The Hsu sub amps already have a low pass filter, which if you wish you can run in tandem with the crossover in the reciever, and chances are they're high passed as well.
Forum: Audio Theory, Setup, and Chat   04-18-2015, 03:11 PM
Replies: 5
Views: 170
Posted By Bill Fitzmaurice
I don't see a Speakon. From left to right are...

I don't see a Speakon. From left to right are 1/4", RCA and two D connectors.
Forum: Subwoofers, Bass, and Transducers   04-17-2015, 03:43 PM
Replies: 9
Views: 192
Posted By Bill Fitzmaurice
It would be a low pass filter. It's rare to see...

It would be a low pass filter. It's rare to see them so employed without an inductor. Is that the coil you're referring to, and not the voice coil?
Forum: DIY Speakers and Subs   04-17-2015, 06:14 AM
Replies: 107
Views: 1,859
Posted By Bill Fitzmaurice
No difference. What an act may put onto their...

No difference. What an act may put onto their recordings isn't what they're going to play live. As for take your breath away chest pounding bass, that's not in the 25-50Hz octave, it's in the...
Forum: Audio Theory, Setup, and Chat   04-17-2015, 05:58 AM
Replies: 63
Views: 836
Posted By Bill Fitzmaurice
True. The fact of the matter is that it doesn't...

True. The fact of the matter is that it doesn't matter. Transmission through the wall decreases as frequency increases, if for no other reason because power density drops by 3dB with each octave...
Forum: Speakers   04-16-2015, 03:04 PM
Replies: 95
Views: 1,791
Posted By Bill Fitzmaurice
From the link: An algorithm was developed to...

From the link:

An algorithm was developed to analyze the low frequency signal in real time and limit the amount of bass that is physically reproduced. A proprietary psychoacoustic bass...
Forum: Speakers   04-16-2015, 07:05 AM
Replies: 5
Views: 106
Posted By Bill Fitzmaurice
The problem with most in-walls is they're not in...

The problem with most in-walls is they're not in fully enclosed tuned cabinets. I'd only consider an in-wall that's in an actual full cabinet.
Forum: Speakers   04-16-2015, 07:02 AM
Replies: 95
Views: 1,791
Posted By Bill Fitzmaurice
A firewall can be realized with staggered wood...

A firewall can be realized with staggered wood stud construction and fire-rated sheet rock. That also helps reduce sound transmission. By the same token floor joists that do not span from the floor...
Forum: Speakers   04-15-2015, 07:15 PM
Replies: 95
Views: 1,791
Posted By Bill Fitzmaurice
It depends on the construction of the building....

It depends on the construction of the building. If it's steel reinforced concrete noise transmission will be minimal. If it's wood framed noise transmission can be considerable. You can achieve...
Forum: Subwoofers, Bass, and Transducers   04-15-2015, 11:07 AM
Replies: 15
Views: 139
Posted By Bill Fitzmaurice
White noise is typically not used for test tones,...

White noise is typically not used for test tones, pink noise is. If you're indeed using white noise that's probably the problem.
Forum: Speakers   04-15-2015, 10:59 AM
Replies: 5
Views: 106
Posted By Bill Fitzmaurice
Flush mount book shelves are your best bet, as...

Flush mount book shelves are your best bet, as they tend to be of better quality than in-walls. The only caveat is that they not be rear ported.
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