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Search: Keyword(s): ; Posts Made By: Bill Fitzmaurice
Forum: Audio Theory, Setup, and Chat   02-09-2016, 02:37 PM
Replies: 7
Views: 116
Posted By Bill Fitzmaurice
It's very unlikely that a trap will affect that.

It's very unlikely that a trap will affect that.
Forum: Audio Theory, Setup, and Chat   02-09-2016, 01:44 PM
Replies: 5
Views: 74
Posted By Bill Fitzmaurice
A boundary must be solid, and it must be a...

A boundary must be solid, and it must be a wavelength in dimension, otherwise the low frequency waves will simply go around it. The exception is when there's another boundary that prevents the wave...
Forum: Speakers   02-09-2016, 01:03 PM
Replies: 15
Views: 238
Posted By Bill Fitzmaurice
Banana plugs are a convenience if you're in the...

Banana plugs are a convenience if you're in the habit of disconnecting and reconnecting your cables but otherwise serve no purpose. I don't bother with them.
Forum: Audio Theory, Setup, and Chat   02-09-2016, 12:55 PM
Replies: 5
Views: 74
Posted By Bill Fitzmaurice
1/4 space is when there are two boundaries less...

1/4 space is when there are two boundaries less than 1/4 wavelength from the radiating plane. 1/8 space is when there are three boundaries. 1/4 wavelength at 80Hz is 3.5 feet.
Forum: Speakers   02-09-2016, 12:50 PM
Replies: 15
Views: 238
Posted By Bill Fitzmaurice
By all means, you must use closed screw. If you...

By all means, you must use closed screw. If you use open screw electrons will fall out of the connection. That's especially a concern if they fall on the floor, because they're slippery little...
Forum: Audio Theory, Setup, and Chat   02-09-2016, 11:25 AM
Replies: 7
Views: 116
Posted By Bill Fitzmaurice
You can fill the cavity to damp reflections, but...

You can fill the cavity to damp reflections, but if the sound waves can't get in there they can't be damped, so the fabric idea is best.
Forum: Subwoofers, Bass, and Transducers   02-09-2016, 08:16 AM
Replies: 9
Views: 251
Posted By Bill Fitzmaurice
A smaller secondary sub might work, but it might...

A smaller secondary sub might work, but it might not. Where it's most likely to work is if the main sub is in the front of the room, the secondary in the back, if that places the secondary sub much...
Forum: Subwoofers, Bass, and Transducers   02-09-2016, 06:07 AM
Replies: 2
Views: 48
Posted By Bill Fitzmaurice
What's shown in the graph is very confusing,...

What's shown in the graph is very confusing, since a logarithmic graph is overlaid on a linear graph, making it next to impossible to tell at what frequencies the impedance peaks lie. Since there's...
Forum: Audio Theory, Setup, and Chat   02-09-2016, 05:50 AM
Replies: 4
Views: 94
Posted By Bill Fitzmaurice
There's nothing magical about a 22 degree minimum...

There's nothing magical about a 22 degree minimum angle. What matters is that you hear material panned left as coming from the left, and that panned right as coming from the right.If you do they're...
Forum: DIY Speakers and Subs   02-08-2016, 03:34 PM
Replies: 9
Views: 154
Posted By Bill Fitzmaurice
Only a very poorly designed amp would suffer that...

Only a very poorly designed amp would suffer that result, especially one with the limited band width of a sub amp.
Forum: Speakers   02-08-2016, 03:23 PM
Replies: 15
Views: 238
Posted By Bill Fitzmaurice
Anything less than 1dB loss is inaudible. You...

Anything less than 1dB loss is inaudible. You could use 20ga or even 26ga as far as insertion loss is concerned, but they would lack the necessary current capacity, so in your case 18ga is the...
Forum: Speakers   02-08-2016, 03:22 PM
Replies: 5
Views: 118
Posted By Bill Fitzmaurice
Power isn't the issue, because power is the...

Power isn't the issue, because power is the product of voltage and current. The lower the impedance the less voltage it takes to reach the same levels. That seems to be a good thing, but the lower...
Forum: Speakers   02-08-2016, 02:08 PM
Replies: 15
Views: 238
Posted By Bill Fitzmaurice
Use this to calculate it: ...

Use this to calculate it:
http://www.bcae1.com/images/swfs/speakerwireselectorassistant.swf
Forum: Subwoofers, Bass, and Transducers   02-08-2016, 02:05 PM
Replies: 4
Views: 71
Posted By Bill Fitzmaurice
Try this: ...

Try this:
http://www.homedepot.com/p/TrafficMASTER-Black-24-in-x-36-in-Anti-Fatigue-Vinyl-Foam-Commercial-Mat-60-571-0900-20000300/202015909

With luck the sub feet will indent into the pad and...
Forum: DIY Speakers and Subs   02-08-2016, 02:00 PM
Replies: 9
Views: 154
Posted By Bill Fitzmaurice
The frequencies at which ferrites have an effect...

The frequencies at which ferrites have an effect are so far outside the bandwidth of audio, let alone a subwoofer, that it wouldn't matter. Besides, ferrites are so inexpensive that it they were...
Forum: DIY Speakers and Subs   02-08-2016, 01:56 PM
Replies: 17
Views: 1,194
Posted By Bill Fitzmaurice
Only if the sub enclosure panels vibrate to the...

Only if the sub enclosure panels vibrate to the point that the sub can only be described as defective. Even if that's the case all that's required to 'isolate' the sub is rubber feet or an...
Forum: Speakers   02-08-2016, 01:36 PM
Replies: 15
Views: 846
Posted By Bill Fitzmaurice
+1, which explains why most commercial studios...

+1, which explains why most commercial studios will have at least three sets. About the only place you'd find nearfields only is home project studios. You'd be hard pressed to call a JBL M2 a...
Forum: Subwoofers, Bass, and Transducers   02-08-2016, 11:24 AM
Replies: 3
Views: 128
Posted By Bill Fitzmaurice
It depends on the size of the room. If it's small...

It depends on the size of the room. If it's small compared to the wavelengths produced then the room boundaries will define the result as much as the subs themselves, in which case spreading the subs...
Forum: Audio Theory, Setup, and Chat   02-08-2016, 06:15 AM
Replies: 2
Views: 39
Posted By Bill Fitzmaurice
You will need a transformer to deliver the...

You will need a transformer to deliver the correct voltage. Speed may be affected by 50Hz versus 60Hz, but that depends on whether or not the turntable synchronizes to the AC line frequency. Some do,...
Forum: DIY Speakers and Subs   02-07-2016, 07:28 PM
Replies: 17
Views: 1,194
Posted By Bill Fitzmaurice
If it's bouncing about it could, but it shouldn't...

If it's bouncing about it could, but it shouldn't bounce about, and if it does something as simple and inexpensive as this will take care of it:...
Forum: Subwoofers, Bass, and Transducers   02-07-2016, 07:10 PM
Replies: 10
Views: 414
Posted By Bill Fitzmaurice
Not if the distance from the LP to room walls or...

Not if the distance from the LP to room walls or even the ceiling results in its being in a null zone.
Forum: DIY Speakers and Subs   02-07-2016, 07:05 PM
Replies: 17
Views: 1,194
Posted By Bill Fitzmaurice
What causes things in the room to vibrate is what...

What causes things in the room to vibrate is what causes your eardrums to vibrate so that you hear the sub: the long wavelengths produced by the movement of the driver cone. If you want objects to...
Forum: Speakers   02-07-2016, 06:56 PM
Replies: 17
Views: 492
Posted By Bill Fitzmaurice
I had that happen to me once when I posted that...

I had that happen to me once when I posted that link here, and I got flagged for it. :mad:
What's odd is that when I put a link in a post I always click on it myself to make sure that it's working....
Forum: Receivers, Amps, and Processors   02-07-2016, 02:04 PM
Replies: 8
Views: 104
Posted By Bill Fitzmaurice
Not that good. Reference simply means having a...

Not that good. Reference simply means having a system capable of reaching 85dB with 20dB of headroom at the LP.

Where calibration is concerned there's nothing magic about a 75dB level. It's...
Forum: Subwoofers, Bass, and Transducers   02-07-2016, 01:51 PM
Replies: 10
Views: 414
Posted By Bill Fitzmaurice
Opposing drivers cancel motive forces that might...

Opposing drivers cancel motive forces that might cause the sub itself to move, but they don't cancel the low frequency long wavelengths that would cause a table in such close proximity to vibrate...
Showing results 1 to 25 of 999

 
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