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Forum: DIY Speakers and Subs   03-27-2015, 06:28 PM
Replies: 5
Views: 82
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: 57
Views: 1,349
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: 499
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: 499
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: 3
Views: 104
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: 462
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: 172
Views: 2,944
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: 172
Views: 2,944
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: 172
Views: 2,944
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: 12,492
Views: 848,478
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: 461
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: 461
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: 209
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: 209
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: 209
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: 657
Posted By Jay1
Very nice build

Very nice build
Forum: DIY Speakers and Subs   03-19-2015, 06:07 PM
Replies: 16
Views: 320
Posted By Jay1
Sorry if this comes across like an ass but you...

Sorry if this comes across like an ass but you are having a house built and you dont get a say in having a room to do with as you please?! F that...
Forum: DIY Speakers and Subs   03-19-2015, 05:05 PM
Replies: 16
Views: 320
Posted By Jay1
How about an infinite baffle setup? If you have...

How about an infinite baffle setup? If you have an attic or something above your room you can just install a manifold with an air return vent being the only thing visible in your room
...
Forum: DIY Speakers and Subs   03-19-2015, 04:51 PM
Replies: 9
Views: 222
Posted By Jay1
I'm pretty sure the cabinet will only tune to a...

I'm pretty sure the cabinet will only tune to a single frequency even if you have prs with varying mass. There isnt any way to predict the results that I know of other then seeing for yourself.

3...
Forum: DIY Speakers and Subs   03-18-2015, 03:02 PM
Replies: 52
Views: 837
Posted By Jay1
Many thanks for the links. That looks to be a...

Many thanks for the links.
That looks to be a fairly straightforward easy build. How critical is port placement? I don't see a lot of specs on the drawings.[/QUOTE]

You can put the ports and...
Forum: DIY Speakers and Subs   03-18-2015, 01:53 PM
Replies: 52
Views: 837
Posted By Jay1
http://www.avsforum.com/forum/attachment.php?attac...

http://www.avsforum.com/forum/attachment.php?attachmentid=611225&stc=1&d=1426711733

DCS450 $125
http://www.parts-express.com/dayton-audio-dcs450-4-18-classic-subwoofer-4-ohm--295-475

SPA250...
Forum: DIY Speakers and Subs   03-17-2015, 07:32 PM
Replies: 27
Views: 608
Posted By Jay1
I seriously doubt that

I seriously doubt that
Forum: DIY Speakers and Subs   03-17-2015, 07:01 PM
Replies: 27
Views: 608
Posted By Jay1
I'm a Crown fan. Quiet, well made, standard...

I'm a Crown fan. Quiet, well made, standard connections. What about a pair of XLS2500s bridged?
Forum: DIY Speakers and Subs   03-17-2015, 03:36 PM
Replies: 34
Views: 923
Posted By Jay1
There's a lot more to choosing a speaker then...

There's a lot more to choosing a speaker then output capability. The OS use nice budget drivers with a well designed xover. The 652 is seriously the cheapest quality drivers with the cheapest xover...
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