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Forum: Subwoofers, Bass, and Transducers   05-24-2017, 07:59 PM
Replies: 4
Views: 68
Posted By Bill Fitzmaurice
I'd have carpet under that too, it absorbs above...

I'd have carpet under that too, it absorbs above bandwidth harmonics that you don't want. For that matter I'd never have a listening room that wasn't fully carpeted.
Forum: Speakers   05-24-2017, 07:53 PM
Replies: 44
Views: 409
Posted By Bill Fitzmaurice
I've tested quite a few, sent to me gratis...

I've tested quite a few, sent to me gratis looking for my endorsement. None were worth the price, so no endorsement.
Knowing that this forum calls BS when BS is presented you shouldn't be surprised...
Forum: Speakers   05-24-2017, 07:01 PM
Replies: 8
Views: 89
Posted By Bill Fitzmaurice
It's exceedingly unlikely that dust could cause...

It's exceedingly unlikely that dust could cause noise, but it can't hurt to blow the heat sinks clean.
Forum: Speakers   05-24-2017, 06:58 PM
Replies: 44
Views: 409
Posted By Bill Fitzmaurice
https://www.parts-express.com/audtek-electronics-s...

https://www.parts-express.com/audtek-electronics-skrl-14-50-14-awg-ofc-speaker-wire-50-ft--100-020
Guy at high end audio store works on commission. :rolleyes:
Forum: Subwoofers, Bass, and Transducers   05-24-2017, 02:59 PM
Replies: 4
Views: 68
Posted By Bill Fitzmaurice
Only if the carpet is so high that it fills a...

Only if the carpet is so high that it fills a significant portion of the air space below the sub.
Forum: Subwoofers, Bass, and Transducers   05-24-2017, 01:32 PM
Replies: 75
Views: 1,474
Posted By Bill Fitzmaurice
Limiters are not fool proof. Their intent is to...

Limiters are not fool proof. Their intent is to keep the occasional high power transient from over-powering the driver. If they're constantly engaged long term heat build up will result, with a...
Forum: Speakers   05-24-2017, 09:12 AM
Replies: 44
Views: 409
Posted By Bill Fitzmaurice
+1. Everyone needs something to believe in. Some...

+1. Everyone needs something to believe in. Some people believe that wire makes a difference. Some believe in pixie dust and unicorns. I believe I'll have another drink. ;)

OP, required reading:...
Forum: Subwoofers, Bass, and Transducers   05-23-2017, 12:31 PM
Replies: 75
Views: 1,474
Posted By Bill Fitzmaurice
If you put the sub attenuator in the negative...

If you put the sub attenuator in the negative that forces you to increase the output of the LFE to reach the same SPL. That can lead to clipping and compression of the LFE output and, if there's a...
Forum: Speakers   05-22-2017, 07:10 PM
Replies: 21
Views: 309
Posted By Bill Fitzmaurice
You won't find anything like that at Best...

You won't find anything like that at Best Buy.Build the 893s.
Forum: Audio Theory, Setup, and Chat   05-22-2017, 09:33 AM
Replies: 26
Views: 347
Posted By Bill Fitzmaurice
Compare the maximum SPL capability of a good sub...

Compare the maximum SPL capability of a good sub to mains at 50Hz and you'll begin to see the light.

Better yet spend that $300, or whatever your budget is, on a speaker than doesn't go lower than...
Forum: Speakers   05-22-2017, 09:25 AM
Replies: 9
Views: 144
Posted By Bill Fitzmaurice
While DefTech may call it an integrated sub real...

While DefTech may call it an integrated sub real subs don't use eight inch drivers. A more accurate description would be that it's a self powered woofer. Being an eight it would probably have better...
Forum: Subwoofers, Bass, and Transducers   05-22-2017, 05:31 AM
Replies: 4
Views: 102
Posted By Bill Fitzmaurice
The distance from the bottom of the cab to the...

The distance from the bottom of the cab to the floor does change the response, and pictures of the Outlaw look like that distance isn't all that much. I'd replace the original feet with either rubber...
Forum: DIY Speakers and Subs   05-22-2017, 05:16 AM
Replies: 15
Views: 291
Posted By Bill Fitzmaurice
That would be a symptom, not a cause....

That would be a symptom, not a cause. Conduit/romex/water pipes etc are too small in dimension for low frequencies to cause them to vibrate. If they're resting against the drywall the drywall can...
Forum: Speakers   05-22-2017, 05:07 AM
Replies: 17
Views: 257
Posted By Bill Fitzmaurice
In that case the right way to do it is with a...

In that case the right way to do it is with a separate pre-amp and power amp, with an electronic crossover in between the two.
Forum: Subwoofers, Bass, and Transducers   05-21-2017, 07:14 PM
Replies: 75
Views: 1,474
Posted By Bill Fitzmaurice
You want to preserve as much headroom as possible...

You want to preserve as much headroom as possible in both the line driver output of the AVR and the input stage of the sub amp. But the numbers on the AVR readout and the position of the dial on the...
Forum: Subwoofers, Bass, and Transducers   05-21-2017, 07:06 PM
Replies: 7
Views: 142
Posted By Bill Fitzmaurice
Have you ever heard good sound in a gymnasium?

Have you ever heard good sound in a gymnasium?
Forum: DIY Speakers and Subs   05-21-2017, 07:03 PM
Replies: 15
Views: 291
Posted By Bill Fitzmaurice
Dynamat has its uses, but this isn't one of them,...

Dynamat has its uses, but this isn't one of them, and it would be prohibitively expensive. A couple of dollars worth of drywall screws is all the OP needs.
Forum: Subwoofers, Bass, and Transducers   05-21-2017, 01:20 PM
Replies: 7
Views: 142
Posted By Bill Fitzmaurice
Down firing might add some acoustic loading to...

Down firing might add some acoustic loading to the driver, but it shouldn't be significant. It also would have lower THD via acoustic filtering if there was carpet there, which there should be. Tile...
Forum: DIY Speakers and Subs   05-21-2017, 12:01 PM
Replies: 1
Views: 45
Posted By Bill Fitzmaurice
Those aren't specs. Nothing there can tell you...

Those aren't specs. Nothing there can tell you what will work well with the cab and crossover.

Those are specs. Another driver within +/-10% or so should function OK.
Forum: Speakers   05-21-2017, 08:59 AM
Replies: 8
Views: 89
Posted By Bill Fitzmaurice
Speakers can't create noise, they can only...

Speakers can't create noise, they can only reproduce the signal that's sent to them. Sporadic static noise is most like due to dirty contacts. Put this on every connector in the system and it may do...
Forum: Subwoofers, Bass, and Transducers   05-21-2017, 07:10 AM
Replies: 13
Views: 307
Posted By Bill Fitzmaurice
20 to 30 years for the driver isn't unusual. The...

20 to 30 years for the driver isn't unusual. The weak link in the chain tends to be the sub amps. Better amps will last at least 20 years, cheaper amps might not get past 5 years.
Forum: Subwoofers, Bass, and Transducers   05-21-2017, 07:08 AM
Replies: 75
Views: 1,474
Posted By Bill Fitzmaurice
Define 'reference'. Since the voltage drive level...

Define 'reference'. Since the voltage drive level of any stage varies with the voltage drive level of the previous stages all you can say with certainty about a 0 level is that it's more than -1,...
Forum: Subwoofers, Bass, and Transducers   05-20-2017, 12:39 PM
Replies: 75
Views: 1,474
Posted By Bill Fitzmaurice
Any signal that passes through zero is AC, not...

Any signal that passes through zero is AC, not DC. Speakers deal with square waves all the time, it's just another complex wave form to them.
That's another misconception. The coil/cone does not...
Forum: Speakers   05-20-2017, 10:22 AM
Replies: 13
Views: 204
Posted By Bill Fitzmaurice
Put the speakers on stands to get them high...

Put the speakers on stands to get them high enough.
Forum: Subwoofers, Bass, and Transducers   05-20-2017, 10:19 AM
Replies: 1
Views: 60
Posted By Bill Fitzmaurice
They're relatively ineffective, with only a 12dB...

They're relatively ineffective, with only a 12dB slope, and the knee frequency is far from precise, as that's determined by the input impedance of the amp that they're driving.
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