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Forum: DIY Speakers and Subs   03-31-2015, 06:55 PM
Replies: 60
Views: 704
Posted By Jay1
Down low yes maybe. If he's looking for that kick...

Down low yes maybe. If he's looking for that kick you in the chest effect the 21sw's good for +10 db above 40hz
Forum: DIY Speakers and Subs   03-31-2015, 06:46 PM
Replies: 60
Views: 704
Posted By Jay1
Not sure I agree. Ricci's test shows the woofer...

Not sure I agree. Ricci's test shows the woofer wont go past 21mm no matter how much power is applied, so basically the low end is excursion limited but the top end is power limited. Models may show...
Forum: DIY Speakers and Subs   03-31-2015, 06:35 PM
Replies: 132
Views: 11,716
Posted By Jay1
I can tell you from first hand experience that...

I can tell you from first hand experience that those crossovers fall somewhere between an online calculator and an actual real crossover. Madisound isnt building a box for your design for $40-75 ;)...
Forum: DIY Speakers and Subs   03-31-2015, 06:31 PM
Replies: 278
Views: 5,981
Posted By Jay1
Boosting is fine as long as you understand the...

Boosting is fine as long as you understand the limits of what you are doing. If you for example put a driver in a 3 ft3 sealed box with 1k watts, look at the spl chart with 1k watts applied, that is...
Forum: DIY Speakers and Subs   03-31-2015, 06:05 PM
Replies: 132
Views: 11,716
Posted By Jay1
http://www.troelsgravesen.dk/Jensen.htm Just...

http://www.troelsgravesen.dk/Jensen.htm

Just one of the many ultra high end designs done by Troels
Forum: DIY Speakers and Subs   03-31-2015, 04:49 PM
Replies: 60
Views: 704
Posted By Jay1
Print screen, then crop in paint. Upload an...

Print screen, then crop in paint. Upload an attachment then put the attachment link into the add an image box above.
...
Forum: DIY Speakers and Subs   03-31-2015, 04:38 PM
Replies: 8
Views: 176
Posted By Jay1
If you're talking about the SEOS yes it is deeper...

If you're talking about the SEOS yes it is deeper then the 1" version.
Forum: DIY Speakers and Subs   03-31-2015, 07:56 AM
Replies: 278
Views: 5,981
Posted By Jay1
The standard (AES) is to rate at 2 hours...

The standard (AES) is to rate at 2 hours continuous pink noise. Most non pro woofers dont claim this, but if they're following the same guidelines continuous program material power handling is 2x...
Forum: DIY Speakers and Subs   03-30-2015, 10:07 PM
Replies: 44
Views: 1,158
Posted By Jay1
Holy bracing! With bracing that over the top you...

Holy bracing! With bracing that over the top you might as well run a front to back brace above the woofer cutout.

Where are you getting elbows for 6" pvc?
Forum: DIY Speakers and Subs   03-30-2015, 09:16 PM
Replies: 8
Views: 176
Posted By Jay1
While my measurements are definitely not perfect,...

While my measurements are definitely not perfect, they should at least be close enough to see what is happening. I dont have a turn table, I use a couple 48" squares to move the measurement setup...
Forum: DIY Speakers and Subs   03-30-2015, 08:30 PM
Replies: 8
Views: 176
Posted By Jay1
Reserved.

Reserved.
Forum: DIY Speakers and Subs   03-30-2015, 08:30 PM
Replies: 8
Views: 176
Posted By Jay1
FaitalPRO HF146

(Disclaimer: these are not definitive measurements of performance)

Alright so anyone who followed my "pondering an 18" thread knows I'm messing around with 1.4" exit waveguides. I originally...
Forum: DIY Speakers and Subs   03-30-2015, 05:34 PM
Replies: 20
Views: 314
Posted By Jay1
The problem with a cheap DIY sub is getting a...

The problem with a cheap DIY sub is getting a decent plate amp. This is probably the best deal out there, 120 watts for $60

http://www.mcmelectronics.com/product/50-6269
Forum: DIY Speakers and Subs   03-29-2015, 05:19 PM
Replies: 3
Views: 80
Posted By Jay1
The outdoors on the ground stuff is called...

The outdoors on the ground stuff is called ground-plane measurements. It is much harder to do for most people due to the amount of space needed, and the low noise environment required.

Indoors...
Forum: DIY Speakers and Subs   03-29-2015, 05:01 PM
Replies: 2
Views: 85
Posted By Jay1
Is it possible they're HSU woofers? HSU used to...

Is it possible they're HSU woofers? HSU used to sell sono subs.
Forum: DIY Speakers and Subs   03-27-2015, 06:28 PM
Replies: 6
Views: 113
Posted By Jay1
Nearfield on a 12" woofer should be done at...

Nearfield on a 12" woofer should be done at approximately 0.525" (mic centered on woofer). This will produce an accurate frequency response measurement from approximately 10 - 410 hz.

There's a...
Forum: DIY Speakers and Subs   03-27-2015, 04:54 PM
Replies: 84
Views: 2,246
Posted By Jay1
I havent tried 4x but normally when I spray...

I havent tried 4x but normally when I spray something flat I'll wipe the finish down with some pledge furniture polish which leaves a nice sheen on the surface making it look satin, and it keeps the...
Forum: Audio Gear   03-27-2015, 03:07 PM
Replies: 22
Views: 586
Posted By Jay1
I did think about that... but I'm going to be...

I did think about that... but I'm going to be limited to 20" wide up front
Forum: Audio Gear   03-27-2015, 02:26 PM
Replies: 22
Views: 586
Posted By Jay1
Dang if I wasnt in the middle of trying to piece...

Dang if I wasnt in the middle of trying to piece together a new LCR build I would definitely be interested in the pair
Forum: DIY Speakers and Subs   03-27-2015, 11:52 AM
Replies: 5
Views: 157
Posted By Jay1
YES! You cant just use an off the shelf crossover...

YES! You cant just use an off the shelf crossover with random drivers. The recommended L pad is seriously just like putting a band aid on a gun shot to the chest.... PE wants you to buy stuff, they...
Forum: DIY Speakers and Subs   03-27-2015, 08:52 AM
Replies: 28
Views: 490
Posted By Jay1
Just be aware if you're pursuing your own active...

Just be aware if you're pursuing your own active setup you need to understand the process of accurately measuring the drivers in order to set proper filters.

The easiest solution would be to find...
Forum: DIY Speakers and Subs   03-27-2015, 08:44 AM
Replies: 278
Views: 5,981
Posted By Jay1
I'm curious how dead set the OP is on massive sub...

I'm curious how dead set the OP is on massive sub 20hz bass? Ricci already tested the B&C 21 in a 25hz ported box. We could extend the box depth and port length several inches for an even lower tune....
Forum: DIY Speakers and Subs   03-25-2015, 06:48 PM
Replies: 278
Views: 5,981
Posted By Jay1
For sub duty the HST is yes.

For sub duty the HST is yes.
Forum: DIY Speakers and Subs   03-25-2015, 05:55 PM
Replies: 278
Views: 5,981
Posted By Jay1
35 ft3 11hz tuned box with the equivalent of a...

35 ft3 11hz tuned box with the equivalent of a 12" round port. BW4 @10hz filter. A pair of the mega 18"s like HST18 or LMS18 per 35 ft3 box, with 3500 watts to the pair for 120db @12 hz
Forum: DIY Speakers and Subs   03-25-2015, 05:26 PM
Replies: 12,494
Views: 849,734
Posted By Jay1
That's just for the plastic version right? It is...

That's just for the plastic version right? It is possible to order 1-2 fiberglass at a time?
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