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Forum: DIY Speakers and Subs   03-31-2015, 07:56 AM
Replies: 256
Views: 5,281
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: 41
Views: 1,075
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: 6
Views: 107
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: 6
Views: 107
Posted By Jay1
Reserved.

Reserved.
Forum: DIY Speakers and Subs   03-30-2015, 08:30 PM
Replies: 6
Views: 107
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: 14
Views: 196
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: 77
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: 82
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: 112
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: 75
Views: 1,985
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: 21
Views: 526
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: 21
Views: 526
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: 156
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: 486
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: 256
Views: 5,281
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: 256
Views: 5,281
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: 256
Views: 5,281
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: 849,523
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?
Forum: DIY Speakers and Subs   03-24-2015, 07:05 PM
Replies: 18
Views: 463
Posted By Jay1
I wouldnt stress too much over that. Your...

I wouldnt stress too much over that. Your velocity is only an "issue" at infrasonic frequencies with maximum output. Either way dropping box volume to 16 ft3 and using a port with 500 cm2 of cross...
Forum: DIY Speakers and Subs   03-24-2015, 06:52 PM
Replies: 18
Views: 463
Posted By Jay1
Low end peaking says your box is slightly over...

Low end peaking says your box is slightly over sized. You should decrease volume until there's a flat line from the mid 20hz range down to the knee, shown as just above 118 db on your graph.
Forum: DIY Speakers and Subs   03-21-2015, 02:43 PM
Replies: 16
Views: 210
Posted By Jay1
The difference is one is severely exceeding xmax...

The difference is one is severely exceeding xmax and the other isnt. The real world results will not match winisd, in that the one exceeding xmax by that much will not be linear.
Forum: DIY Speakers and Subs   03-21-2015, 01:55 PM
Replies: 16
Views: 210
Posted By Jay1
You can get the Alpine for $210 ...

You can get the Alpine for $210
...
Forum: DIY Speakers and Subs   03-21-2015, 01:48 PM
Replies: 16
Views: 210
Posted By Jay1
You should try modeling the Alpine SWR15. It...

You should try modeling the Alpine SWR15. It works better in a smaller box and has a lot more throw then the Dayton.
Forum: DIY Speakers and Subs   03-20-2015, 08:40 AM
Replies: 4
Views: 187
Posted By Jay1
That's really bad advice. While it's true that...

That's really bad advice. While it's true that the woofers are less effected by the effects of surface mounting, it definitely makes a noticeable difference to the tweeters response. Depending on...
Forum: DIY Speakers and Subs   03-20-2015, 07:41 AM
Replies: 30
Views: 658
Posted By Jay1
Very nice build

Very nice build
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