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Forum: DIY Speakers and Subs   11-25-2014, 04:41 PM
Replies: 161
Views: 3,801
Posted By Bill Fitzmaurice
The choice usually boils down to what you have...

The choice usually boils down to what you have more of, time or money. The average person has more of the former than the latter. Having been on both sides of that fence I still tend to do anything...
Forum: DIY Speakers and Subs   11-25-2014, 04:25 PM
Replies: 6
Views: 148
Posted By Bill Fitzmaurice
When you have multiple subs you'll usually get...

When you have multiple subs you'll usually get best results placing them around the room. Having them symmetrically placed as you do looks nice, but looks should be a secondary concern. Speaking of...
Forum: Audio Theory, Setup, and Chat   11-25-2014, 04:18 PM
Replies: 6
Views: 95
Posted By Bill Fitzmaurice
They're not the same. Bi-wiring removes the...

They're not the same. Bi-wiring removes the jumper from the back of the speaker, moves it to the back of the AVR, where one amp uses two wires to connect to the speaker. Passive bi-amping removes the...
Forum: Subwoofers, Bass, and Transducers   11-25-2014, 11:43 AM
Replies: 12
Views: 182
Posted By Bill Fitzmaurice
Most people are inclined to put subs in the front...

Most people are inclined to put subs in the front of the room, with the driver facing them. Why? Because that's how they've always seen it done. Most people who have dual subs put both of them in the...
Forum: DIY Speakers and Subs   11-25-2014, 11:36 AM
Replies: 26
Views: 500
Posted By Bill Fitzmaurice
I use a horizontal line array center, which is...

I use a horizontal line array center, which is one configuration that's technically even worse than a horizontal MTM. I got around the inherent problems of a horizontal line array by making it...
Forum: Audio Theory, Setup, and Chat   11-25-2014, 11:24 AM
Replies: 4
Views: 60
Posted By Bill Fitzmaurice
That would put the HF horn on the wrong axis.

That would put the HF horn on the wrong axis.
Forum: DIY Speakers and Subs   11-25-2014, 06:48 AM
Replies: 161
Views: 3,801
Posted By Bill Fitzmaurice
It can, and does, but not at a price that makes...

It can, and does, but not at a price that makes any sense to someone who has the skills to DIY.
Forum: Audio Theory, Setup, and Chat   11-25-2014, 06:42 AM
Replies: 4
Views: 60
Posted By Bill Fitzmaurice
Low frequencies from a woofer will simply go...

Low frequencies from a woofer will simply go around the screen. You can't block midranges or tweeters.
Forum: Audio Theory, Setup, and Chat   11-25-2014, 06:40 AM
Replies: 6
Views: 95
Posted By Bill Fitzmaurice
Don't bother, it doesn't do anything. So-called...

Don't bother, it doesn't do anything. So-called 'passive bi-amping' is a marketing tool, aimed at the masses who have no understanding of how gear works.
Forum: Subwoofers, Bass, and Transducers   11-24-2014, 08:58 PM
Replies: 12
Views: 182
Posted By Bill Fitzmaurice
If it didn't work well where I have it then it...

If it didn't work well where I have it then it wouldn't be there. But by and large placing the sub in the rear of the room works better than the front if you only have one.
Forum: Subwoofers, Bass, and Transducers   11-24-2014, 08:48 PM
Replies: 18
Views: 578
Posted By Bill Fitzmaurice
Maximum SPL isn't always what you're after. In a...

Maximum SPL isn't always what you're after. In a large venue you always have to consider the inverse square rule. If you cluster the subs in the middle of a 200 foot wide room the levels are going to...
Forum: DIY Speakers and Subs   11-24-2014, 08:28 PM
Replies: 161
Views: 3,801
Posted By Bill Fitzmaurice
For me that would have been in 1972. :)

For me that would have been in 1972. :)
Forum: Subwoofers, Bass, and Transducers   11-24-2014, 04:17 PM
Replies: 18
Views: 578
Posted By Bill Fitzmaurice
This is why they do so: ...

This is why they do so:
http://www.prosoundweb.com/article/in_search_of_the_power_alley/

We don't normally do this with HT because of the small room sizes, which result in boundary reflections...
Forum: Subwoofers, Bass, and Transducers   11-24-2014, 02:48 PM
Replies: 18
Views: 578
Posted By Bill Fitzmaurice
There's a reason why it's called the...

There's a reason why it's called the Cine-Monster: it's made to deliver adequate SPL in very large spaces. If you have a 1,000 seat cinema then having four of them might make some sense. In a home...
Forum: Subwoofers, Bass, and Transducers   11-24-2014, 02:38 PM
Replies: 12
Views: 182
Posted By Bill Fitzmaurice
My sub is a foot behind my recliner. No issues...

My sub is a foot behind my recliner. No issues whatsoever. :cool:
Forum: DIY Speakers and Subs   11-24-2014, 02:35 PM
Replies: 161
Views: 3,801
Posted By Bill Fitzmaurice
I change my oil, because when I do it myself I...

I change my oil, because when I do it myself I know what's being put into my engine. That's important to me, because I only use high grade synthetic oil, and while shops offer it I want to be sure...
Forum: DIY Speakers and Subs   11-24-2014, 10:44 AM
Replies: 15
Views: 409
Posted By Bill Fitzmaurice
Use subwoofers. If you need subs with sensitivity...

Use subwoofers. If you need subs with sensitivity to match, or even exceed, that of the mains, use folded horns. If you would rather go with direct radiators use as many as are required to meet your...
Forum: Subwoofers, Bass, and Transducers   11-24-2014, 07:11 AM
Replies: 10
Views: 456
Posted By Bill Fitzmaurice
With parallel connections the same voltage will...

With parallel connections the same voltage will be input to every driven device, no matter what the number. What will happen with a sufficient number of driven devices/amps is that the total load...
Forum: Audio Theory, Setup, and Chat   11-23-2014, 08:42 PM
Replies: 10
Views: 236
Posted By Bill Fitzmaurice
True, as not all manufacturers do balanced...

True, as not all manufacturers do balanced connections as they should. This explains:
http://www.rane.com/note110.html

OTOH most pro-sound manufacturers do it right. I've worked with hundreds of...
Forum: Speakers   11-23-2014, 02:49 PM
Replies: 48
Views: 1,085
Posted By Bill Fitzmaurice
FWIW CCA works perfectly well, it just has higher...

FWIW CCA works perfectly well, it just has higher resistance than copper, so you need a larger gauge or a shorter length for the same result as copper. Knowing how much larger a gauge or shorter a...
Forum: Subwoofers, Bass, and Transducers   11-23-2014, 07:27 AM
Replies: 5
Views: 162
Posted By Bill Fitzmaurice
There's no such thing. Those attributes do not...

There's no such thing. Those attributes do not occur in the subwoofer frequencies. The only concerns with subs are accuracy, frequency response and output. In your case for music only you don't need...
Forum: Audio Theory, Setup, and Chat   11-23-2014, 07:17 AM
Replies: 10
Views: 236
Posted By Bill Fitzmaurice
Balanced connections remove the possibility of...

Balanced connections remove the possibility of ground loops. They also give much better signal to noise, because they have a very high common mode rejection ratio, unbalanced connections don't. You...
Forum: DIY Speakers and Subs   11-22-2014, 08:05 PM
Replies: 2
Views: 126
Posted By Bill Fitzmaurice
Correct. That 'basshorn' might have a length of...

Correct. That 'basshorn' might have a length of 22 inches, so it will only horn load to 150Hz or so. It's not a unique or new design by any means.

Not correct, though horns are bandpass...
Forum: DIY Speakers and Subs   11-22-2014, 11:23 AM
Replies: 161
Views: 3,801
Posted By Bill Fitzmaurice
No surprise there, as soon as I see '21 inch' and...

No surprise there, as soon as I see '21 inch' and 'horn' I envision a driver that's too big in a horn that's too small to give good results below 35Hz. I don't even use eighteens in horns. Horns work...
Forum: DIY Speakers and Subs   11-22-2014, 07:07 AM
Replies: 161
Views: 3,801
Posted By Bill Fitzmaurice
Nor a good horn loaded sub, I suspect. Even the...

Nor a good horn loaded sub, I suspect. Even the co-designer of the Funk said:
"I keep saying this over and over. But here is a bit of background on why I say the following: Closest thing to a...
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