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Forum: Speakers   03-06-2015, 07:30 AM
Replies: 16
Views: 301
Posted By Bill Fitzmaurice
+1. Go to your nearest Bose listening room and...

+1. Go to your nearest Bose listening room and compare them to all the other brands found there. :rolleyes:
Forum: Audio Theory, Setup, and Chat   03-05-2015, 01:46 PM
Replies: 19
Views: 281
Posted By Bill Fitzmaurice
The main reason why horizontal dispersion is more...

The main reason why horizontal dispersion is more important than vertical is that listening areas tend to be much wider than they are high, so if a speaker does have dispersion that's not uniform it...
Forum: Speakers   03-05-2015, 01:34 PM
Replies: 24
Views: 349
Posted By Bill Fitzmaurice
As do manually adjustable EQs. Both of these...

As do manually adjustable EQs. Both of these technologies pre-date automated systems, by decades.
Forum: Speakers   03-04-2015, 03:46 PM
Replies: 2
Views: 54
Posted By Bill Fitzmaurice
It will have exactly the same effect as...

It will have exactly the same effect as connecting AC wiring from your breaker box to wall outlets, and then plugging AC powered devices into those wall outlets: None. ;)
Forum: Subwoofers, Bass, and Transducers   03-04-2015, 07:31 AM
Replies: 26
Views: 419
Posted By Bill Fitzmaurice
Unless constructed of toothpicks and tissue paper...

Unless constructed of toothpicks and tissue paper I can't imagine how any floor could vibrate in reaction to the output of a 6.5 inch sub. I can see a tiny lightweight sub bouncing about in obeyance...
Forum: Subwoofers, Bass, and Transducers   03-03-2015, 02:11 PM
Replies: 26
Views: 419
Posted By Bill Fitzmaurice
It is possible that some vibrations are reduced,...

It is possible that some vibrations are reduced, but not for the reasons most people assume, nor for the reasons Auralex claims. The floor, walls, ceiling and everything in the room will vibrate in...
Forum: Speakers   03-03-2015, 01:50 PM
Replies: 7
Views: 173
Posted By Bill Fitzmaurice
You would if you could keep the power constant,...

You would if you could keep the power constant, but you can't. Frequency response is voltage derived, and the voltage delivery of an amp remains constant into any load. Current, and therefore power,...
Forum: Subwoofers, Bass, and Transducers   03-03-2015, 10:51 AM
Replies: 26
Views: 419
Posted By Bill Fitzmaurice
REW doesn't succumb to Placebo Effect. ;)

REW doesn't succumb to Placebo Effect. ;)
Forum: Speakers   03-03-2015, 06:59 AM
Replies: 6
Views: 200
Posted By Bill Fitzmaurice
The costs of marketing and distribution greatly...

The costs of marketing and distribution greatly exceed the actual build cost for most products. Where speakers are concerned you can reduce those costs buying from internet direct companies, or...
Forum: DIY Speakers and Subs   03-02-2015, 01:20 PM
Replies: 75
Views: 980
Posted By Bill Fitzmaurice
+1. I have a $100 saw, outfitted with extra large...

+1. I have a $100 saw, outfitted with extra large wings that I made for it, and a $300 fence. I can get away with a $100 saw because I never use it to cut anything thicker than 3/4" plywood. There...
Forum: Subwoofers, Bass, and Transducers   03-02-2015, 12:03 PM
Replies: 7
Views: 137
Posted By Bill Fitzmaurice
You may. But, contrary to popular belief, you...

You may. But, contrary to popular belief, you don't have to. If using it sounds better then it is better.
Forum: Subwoofers, Bass, and Transducers   03-02-2015, 10:28 AM
Replies: 7
Views: 137
Posted By Bill Fitzmaurice
You use the AVR crossover to split the signal...

You use the AVR crossover to split the signal between subs and mains. The low pass filter in the sub may be optionally employed to add a higher degree of filtering above the crossover frequency, to...
Forum: Subwoofers, Bass, and Transducers   03-02-2015, 07:47 AM
Replies: 4
Views: 104
Posted By Bill Fitzmaurice
The confusion over magnets and HDs goes back to...

The confusion over magnets and HDs goes back to the days of recording tape, when a magnetic field was used to erase tapes. But that field was the alternating field of an AC powered electromagnet, not...
Forum: Speakers   03-02-2015, 06:22 AM
Replies: 84
Views: 1,471
Posted By Bill Fitzmaurice
He doesn't specify that because acoustical...

He doesn't specify that because acoustical engineers don't consider percentage losses. They consider decibels. If your charts were referenced to decibels of insertion loss they'd have some value, but...
Forum: Audio Theory, Setup, and Chat   03-01-2015, 08:10 PM
Replies: 19
Views: 281
Posted By Bill Fitzmaurice
No matter what the dispersion pattern of the...

No matter what the dispersion pattern of the tweeter it shrinks as frequency increases, so to be sure you hear all the highs you need to be reasonably close to the tweeter axis. This also applies to...
Forum: Audio Theory, Setup, and Chat   03-01-2015, 08:04 PM
Replies: 24
Views: 295
Posted By Bill Fitzmaurice
That's quite common with inexpensive speakers...

That's quite common with inexpensive speakers that have piezo tweeters and don't have a resistor wired in series with the piezo. The capacitive load of the piezo results in an impedance load that...
Forum: Audio Theory, Setup, and Chat   03-01-2015, 02:42 PM
Replies: 19
Views: 281
Posted By Bill Fitzmaurice
They don't. A speaker must specifically designed...

They don't. A speaker must specifically designed to accomplish that.
Forum: Audio Theory, Setup, and Chat   03-01-2015, 01:27 PM
Replies: 24
Views: 295
Posted By Bill Fitzmaurice
Not if you don't play loudly enough to cause it...

Not if you don't play loudly enough to cause it to shut down. The operative question is how loud is that? Finding out the hard way that it's not as loud as you want is an expensive proposition. I'd...
Forum: Subwoofers, Bass, and Transducers   02-28-2015, 04:41 PM
Replies: 4
Views: 104
Posted By Bill Fitzmaurice
No. Permanent magnets don't bother hard drives. A...

No. Permanent magnets don't bother hard drives. A good thing, too, as hard drives contain permanent magnets.
https://www.kjmagnetics.com/blog.asp?p=hard-drive-destruction
Forum: Speakers   02-28-2015, 08:44 AM
Replies: 3
Views: 57
Posted By Bill Fitzmaurice
No. If you do you stand a good chance of damaging...

No. If you do you stand a good chance of damaging the amps.
Forum: Speakers   02-28-2015, 07:01 AM
Replies: 23
Views: 242
Posted By Bill Fitzmaurice
That's the only reason it's offered. No...

That's the only reason it's offered. No manufacturer wants to lose a sale because they don't have it. That applies to both AVRs and speakers. The only manufacturer that I'm aware of that's more or...
Forum: Speakers   02-27-2015, 03:47 PM
Replies: 10
Views: 187
Posted By Bill Fitzmaurice
Typically the B output is connected to the same...

Typically the B output is connected to the same power amp as the A output, so there's nothing to be gained.
Sony typically will only work well with 6 ohm or higher loads. It may work OK with 4 ohm,...
Forum: DIY Speakers and Subs   02-27-2015, 02:37 PM
Replies: 6
Views: 88
Posted By Bill Fitzmaurice
In the home those might work OK, but I'd never...

In the home those might work OK, but I'd never trust them for professional use. I've not yet found a knock-off connector that's roadworthy. For me it's only genuine Neutrik, Switchcraft, Amphenol or...
Forum: Speakers   02-27-2015, 02:29 PM
Replies: 23
Views: 242
Posted By Bill Fitzmaurice
You can cut the THD to the HF speaker section a...

You can cut the THD to the HF speaker section a lot more than that, as you can fully clip the LF amp while keeping the HF amp clean. That would be an unusual scenario, at least in consumer...
Forum: Speakers   02-27-2015, 12:36 PM
Replies: 23
Views: 242
Posted By Bill Fitzmaurice
That's going too far. Even low end speakers will...

That's going too far. Even low end speakers will sound better with active bi-amping, due to the lowered THD and IMD in the amplification stages, and the elimination of all the shortcomings of passive...
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