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Forum: Subwoofers, Bass, and Transducers   09-14-2014, 01:57 PM
Replies: 1
Views: 68
Posted By Bill Fitzmaurice
If you don't have the technical chops to fix it...

If you don't have the technical chops to fix it yourself it's probably time to move on. Sub technology has come a long way since 1996. If you have to pay someone to fix it the repair cost will likely...
Forum: Audio theory, Setup and Chat   09-14-2014, 01:43 PM
Replies: 29
Views: 370
Posted By Bill Fitzmaurice
Not necessarily. So long as both options have the...

Not necessarily. So long as both options have the same f3 they'll go equally low. So long as the combined driver displacement and total power of the two lesser subs are at least the equal of the one...
Forum: Speakers   09-14-2014, 07:54 AM
Replies: 8
Views: 179
Posted By Bill Fitzmaurice
Do subs first, then re-assess. You may not need...

Do subs first, then re-assess. You may not need better mains capacity. If you do you'll get a better result with a 2x5" speaker than a 1x6" speaker. For that matter a dual woofer speaker will nearly...
Forum: Audio theory, Setup and Chat   09-14-2014, 05:58 AM
Replies: 6
  ohms
Views: 179
Posted By Bill Fitzmaurice
So did I, but I knew how to do it with the amp I...

So did I, but I knew how to do it with the amp I was using. Not all amps will be happy doing this, and some will be downright unhappy, so without knowing the exact amp configuration being used my...
Forum: Audio theory, Setup and Chat   09-14-2014, 05:48 AM
Replies: 29
Views: 370
Posted By Bill Fitzmaurice
The most important suggestion is that to get the...

The most important suggestion is that to get the best results you must measure the system/room response, otherwise you're throwing darts while blindfolded. With respect to midrange and high frequency...
Forum: Audio theory, Setup and Chat   09-14-2014, 05:40 AM
Replies: 5
Views: 118
Posted By Bill Fitzmaurice
When it exceeds that of the original media. CD...

When it exceeds that of the original media. CD exceeds the frequency response, signal to noise and dynamic range of vinyl, and of the tape that the vinyl was mastered from.
Forum: Speakers   09-14-2014, 05:32 AM
Replies: 7
Views: 155
Posted By Bill Fitzmaurice
When a driver isn't mounted in an enclosure the...

When a driver isn't mounted in an enclosure the low frequency radiations from the front and the rear of the cone will cancel each other out. It's not that the guys aren't being nice, it's that this...
Forum: Speakers   09-13-2014, 07:16 PM
Replies: 12
Views: 136
Posted By Bill Fitzmaurice
Put the two speakers side by side, put them into...

Put the two speakers side by side, put them into 'large' mode so that they're getting bass information. Leave one unplugged, play music. Plug the second speaker in. The bass level should go up. If it...
Forum: Audio theory, Setup and Chat   09-13-2014, 07:59 AM
Replies: 6
  ohms
Views: 179
Posted By Bill Fitzmaurice
Depending on the amp you may fry it, so don't do...

Depending on the amp you may fry it, so don't do this.
Forum: Audio theory, Setup and Chat   09-13-2014, 05:57 AM
Replies: 29
Views: 370
Posted By Bill Fitzmaurice
That will result in bass suckout centered around...

That will result in bass suckout centered around 50Hz, making it as bad an LP placement as you can have.
http://www.padrick.net/LiveSound/CancellationMode.htm

Put the LP less than 3 feet from the...
Forum: DIY Speakers and Subs   09-12-2014, 05:37 PM
Replies: 169
Views: 6,812
Posted By Bill Fitzmaurice
And below 20Hz there simply isn't an inexpensive...

And below 20Hz there simply isn't an inexpensive option. Lots of drivers and lots of watts don't come cheap.
Forum: DIY Speakers and Subs   09-12-2014, 02:33 PM
Replies: 169
Views: 6,812
Posted By Bill Fitzmaurice
That sword has two edges. You can feed it more...

That sword has two edges. You can feed it more power for a given excursion, but you also need to feed it more power for a given dB output. That means for a given level you need more drivers and more...
Forum: Subwoofers, Bass, and Transducers   09-12-2014, 11:47 AM
Replies: 12
Views: 866
Posted By Bill Fitzmaurice
Plugging ports lowers the tuning frequency, which...

Plugging ports lowers the tuning frequency, which also shifts the region of minimum excursion to the lower tuning frequency. That will cause an increase in excursion at the previous tuning frequency,...
Forum: Speakers   09-12-2014, 11:35 AM
Replies: 1
Views: 71
Posted By Bill Fitzmaurice
A driver that's not in an enclosure will have no...

A driver that's not in an enclosure will have no bass response, the front and rear cone radiations will cancel each other. In addition the driver and enclosure must be properly matched, using the...
Forum: DIY Speakers and Subs   09-12-2014, 09:31 AM
Replies: 4
Views: 207
Posted By Bill Fitzmaurice
Any mods that reduce internal reflections will...

Any mods that reduce internal reflections will have a positive result, but said result may be so slight as to be barely measurable, let alone audible. You have to consider the size of the surface...
Forum: Audio theory, Setup and Chat   09-12-2014, 09:16 AM
Replies: 21
Views: 307
Posted By Bill Fitzmaurice
The first thing I'd do is take the Emotiva amps...

The first thing I'd do is take the Emotiva amps out of the system and see if that helps. The noise specs on the Denon aren't bad, and it should have plenty of power to drive those speakers. Noise is...
Forum: Subwoofers, Bass, and Transducers   09-12-2014, 06:03 AM
Replies: 10
Views: 407
Posted By Bill Fitzmaurice
That's because the distance relationships between...

That's because the distance relationships between the sub, you and the room boundaries have changed, and along with them the low frequency response. Curing that isn't a matter of adding traps, it's a...
Forum: DIY Speakers and Subs   09-12-2014, 05:55 AM
Replies: 12
Views: 391
Posted By Bill Fitzmaurice
They're similar, but not identical. I still...

They're similar, but not identical. I still wouldn't pay more for AcoustaStuff. I wouldn't order polyfill on line either, you can get it as pillow stuffing at any local Walmart or fabric store.
Forum: Audio theory, Setup and Chat   09-12-2014, 05:48 AM
Replies: 21
Views: 307
Posted By Bill Fitzmaurice
We'd have to know what gear you have to even...

We'd have to know what gear you have to even venture a guess as to how it could be made better.
Forum: Audio theory, Setup and Chat   09-10-2014, 07:23 PM
Replies: 5
Views: 157
Posted By Bill Fitzmaurice
1/6 octave is the most commonly used by pros, as...

1/6 octave is the most commonly used by pros, as that's the smallest resolution that can be easily heard.
Forum: DIY Speakers and Subs   09-10-2014, 04:21 PM
Replies: 5
Views: 222
Posted By Bill Fitzmaurice
Corners are the strongest points in the cab, so...

Corners are the strongest points in the cab, so they don't need bracing. Spline braces are better than nothing, but just. Panel to panel braces are the most effective and require the least amount of...
Forum: Audio theory, Setup and Chat   09-10-2014, 03:29 PM
Replies: 3
Views: 155
Posted By Bill Fitzmaurice
A driver stuck into an enclosure that's not...

A driver stuck into an enclosure that's not specifically tuned to the driver's Theile-Small specs won't work very well. Speaker enclosures aren't just a method of storing drivers, they are just as...
Forum: Audio theory, Setup and Chat   09-10-2014, 05:05 AM
Replies: 9
Views: 14,104
Posted By Bill Fitzmaurice
Get one of these: ...

Get one of these:
http://www.amazon.com/Kanex-Pro-Converter-uncompressed-AUD2ACV/dp/B005DGHV1W/ref=sr_1_2?ie=UTF8&qid=1410350627&sr=8-2&keywords=kanexpro+optical
Forum: DIY Speakers and Subs   09-09-2014, 02:12 PM
Replies: 2
Views: 76
Posted By Bill Fitzmaurice
Only if it has outputs for them, which your...

Only if it has outputs for them, which your owners manual would say. Most TVs don't, it's assumed one would buy a receiver.
Forum: Subwoofers, Bass, and Transducers   09-09-2014, 11:57 AM
Replies: 14
Views: 339
Posted By Bill Fitzmaurice
Good call. Peruse the OPs post history and his...

Good call. Peruse the OPs post history and his agenda will become clear. Whatever you do, don't feed him. ;)
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