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Forum: DIY Speakers and Subs   03-27-2017, 12:57 PM
Replies: 6
Views: 49
Posted By Bill Fitzmaurice
That entails using speaker modeling software to...

That entails using speaker modeling software to see what size cab any given driver needs for the desired result.
Forum: DIY Speakers and Subs   03-27-2017, 12:49 PM
Replies: 6
Views: 49
Posted By Bill Fitzmaurice
None, so long as the cab and driver combination...

None, so long as the cab and driver combination gives the desired result. But since a car sub only has to work in about a 100 cubic foot 'room', and a typical HT room is at least ten times that, it...
Forum: Speakers   03-27-2017, 12:04 PM
Replies: 9
Views: 109
Posted By Bill Fitzmaurice
+1. Where output capacity is concerned that's...

+1. Where output capacity is concerned that's limited by the driver displacement, which is cone area multiplied by maximum excursion. You can find some fives with more displacement than some eights. ...
Forum: Speakers   03-27-2017, 11:55 AM
Replies: 133
Views: 3,566
Posted By Bill Fitzmaurice
Complete descriptions, including dimensions, of...

Complete descriptions, including dimensions, of all of my cabs are listed on my website.
Forum: Speakers   03-27-2017, 09:11 AM
Replies: 133
Views: 3,566
Posted By Bill Fitzmaurice
Yeah, they're hard to find. Only 1530 hits for...

Yeah, they're hard to find. Only 1530 hits for Bill Fitzmaurice on youtube. :rolleyes:
Forum: Speakers   03-27-2017, 07:18 AM
Replies: 11
Views: 97
Posted By Bill Fitzmaurice
Slim to none, and Slim just left town. The frame...

Slim to none, and Slim just left town. The frame is broken. Even if you managed to fix that you'd then have to do a recone.
Forum: Subwoofers, Bass, and Transducers   03-26-2017, 01:59 PM
Replies: 7
Views: 112
Posted By Bill Fitzmaurice
They may go to 38Hz but a pair of six inch...

They may go to 38Hz but a pair of six inch woofers isn't going to do so with authority. I wouldn't use a pair of sixes below 80Hz, they just can't move enough air. That said, a single ten inch loaded...
Forum: Subwoofers, Bass, and Transducers   03-26-2017, 09:05 AM
Replies: 2
Views: 74
Posted By Bill Fitzmaurice
Whatever break in that occurs doesn't require any...

Whatever break in that occurs doesn't require any special technique, and will be complete after a week or so of normal use.
Forum: Subwoofers, Bass, and Transducers   03-26-2017, 06:53 AM
Replies: 5
Views: 153
Posted By Bill Fitzmaurice
Without a chart to see what your response is it's...

Without a chart to see what your response is it's a shot in the dark as to the cause.
Forum: DIY Speakers and Subs   03-25-2017, 07:11 PM
Replies: 3
Views: 210
Posted By Bill Fitzmaurice
Google Allison Effect, it explains all.

Google Allison Effect, it explains all.
Forum: Audio Theory, Setup, and Chat   03-25-2017, 07:01 PM
Replies: 5
Views: 79
Posted By Bill Fitzmaurice
They are, it's a well known phenomenon.

They are, it's a well known phenomenon.
Forum: Speakers   03-25-2017, 02:43 PM
Replies: 136
Views: 3,079
Posted By Bill Fitzmaurice
While there's no question that frequency response...

While there's no question that frequency response is at the top of the list it would be a major error to stop reading Joe's article after reading that statement. All of the other measurements that he...
Forum: DIY Speakers and Subs   03-25-2017, 02:25 PM
Replies: 17
Views: 254
Posted By Bill Fitzmaurice
What you're saying is that you could run the...

What you're saying is that you could run the channel volume very low or very high but the low frequency content of that channel that's been diverted to the sub wouldn't track the volume of the...
Forum: DIY Speakers and Subs   03-25-2017, 09:46 AM
Replies: 17
Views: 254
Posted By Bill Fitzmaurice
That's as it should be. The level of what's going...

That's as it should be. The level of what's going into the sub should track along with the level of what's going into the main that would otherwise be reproducing those low frequencies if there was...
Forum: DIY Speakers and Subs   03-25-2017, 06:50 AM
Replies: 24
Views: 371
Posted By Bill Fitzmaurice
Bandwidth limitations are caused by cable...

Bandwidth limitations are caused by cable capacitance, and that's the product of the thickness and dielectric constant of the insulation, not the gauge of the wire. Thinner wires allow for thicker...
Forum: Speakers   03-24-2017, 06:47 PM
Replies: 136
Views: 3,079
Posted By Bill Fitzmaurice
It's a start. There's a lot of factors that go...

It's a start. There's a lot of factors that go into the end result. Axial frequency response is one of them, and it's arguably the most important, so you can't discount the value of DSP. But as you...
Forum: Speakers   03-24-2017, 03:25 PM
Replies: 136
Views: 3,079
Posted By Bill Fitzmaurice
How so? Speak for yourself. Try reading this: ...

How so?
Speak for yourself. Try reading this:
http://www.introni.it/pdf/Olson%20-%20Elements%20of%20Acoustical%20Engineering%201940.pdf
Note the publication date: 1940. And we've learned a wee...
Forum: Speakers   03-24-2017, 01:36 PM
Replies: 136
Views: 3,079
Posted By Bill Fitzmaurice
What we can measure goes well beyond what we can...

What we can measure goes well beyond what we can hear. That is a scientific fact.
Forum: Speakers   03-24-2017, 12:51 PM
Replies: 133
Views: 3,566
Posted By Bill Fitzmaurice
From what I've seen there they do just that, and...

From what I've seen there they do just that, and this is a case in point. Did you look at Terry London's biography? He's not an audio professional. He's a 'practitioner of rational emotive behavior...
Forum: Speakers   03-24-2017, 09:07 AM
Replies: 136
Views: 3,079
Posted By Bill Fitzmaurice
+1. EQ can make their on-axis response so close...

+1. EQ can make their on-axis response so close as to be virtually indistinguishable, but on-axis response is by no means the only defining quality of a speaker.
Forum: Speakers   03-24-2017, 07:23 AM
Replies: 133
Views: 3,566
Posted By Bill Fitzmaurice
Define 'professional'. :rolleyes:

Define 'professional'. :rolleyes:
Forum: Speakers   03-23-2017, 11:49 AM
Replies: 11
Views: 97
Posted By Bill Fitzmaurice
You can substitute another driver with very...

You can substitute another driver with very similar T/S specs and response as the original. The problem will lie in finding a driver data sheet that contains that information, manufacturers tend not...
Forum: Subwoofers, Bass, and Transducers   03-23-2017, 08:41 AM
Replies: 2
Views: 49
Posted By Bill Fitzmaurice
Using unshielded speaker wire may cause noise...

Using unshielded speaker wire may cause noise issues. Besides, that nice corner may prove to sound bad. You have to figure out where it sounds best first, then do what it takes to put it there.
Forum: Speakers   03-22-2017, 02:27 PM
Replies: 34
Views: 523
Posted By Bill Fitzmaurice
That could happen if the amp was driven beyond...

That could happen if the amp was driven beyond its capacity. There's a cure for that: don't drive it beyond its capacity.
Forum: Speakers   03-22-2017, 11:07 AM
Replies: 34
Views: 523
Posted By Bill Fitzmaurice
If that happens within the designated operating...

If that happens within the designated operating range of the amp then the amp is at best not working up to spec, at worst defective.
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