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Forum: DIY Speakers and Subs   02-26-2017, 05:13 PM
Replies: 306
Views: 28,794
Posted By mtg90
I would not adjust the highpass settings as in...

I would not adjust the highpass settings as in room you will likely get extension down below 18hz in the 20hz setting. You should measure and then adjust EQ settings as necessary to get the response...
Forum: DIY Speakers and Subs   02-25-2017, 03:42 PM
Replies: 50
Views: 808
Posted By mtg90
Make sure the sample rate setting in REW's...

Make sure the sample rate setting in REW's preferences, along with the the soundcard and microphone settings for the OS are all set to the same sample rate (usually best at 48khz). If not it can...
Forum: Speakers   02-19-2017, 10:09 PM
Replies: 3,962
Views: 178,612
Posted By mtg90
* This data was exported from DATS the Dayton...

* This data was exported from DATS the Dayton Audio Test System
*
* Manufacturer: Behringer
* Model:B215XL Woofer
* Piston Diameter = 323.9 mm
* f(s)= 32.3 Hz
* R(e)= 6.247 Ohms
* Z(max)=...
Forum: DIY Speakers and Subs   02-19-2017, 01:35 PM
Replies: 277
Views: 14,860
Posted By mtg90
No not really, the waveguide looks similar to the...

No not really, the waveguide looks similar to the one used in the QSC 2150 but the titan designs use different woofers, midrange and compression drivers. Being a design that is high sensitivity,...
Forum: DIY Speakers and Subs   02-18-2017, 11:43 AM
Replies: 84
Views: 3,417
Posted By mtg90
This material works great, stuff stays put when...

This material works great, stuff stays put when placed on it but it also does not stick to paint when left for prolonged periods or leave imprints in the finish. It's pretty much the same material...
Forum: DIY Speakers and Subs   02-12-2017, 06:08 PM
Replies: 277
Views: 14,860
Posted By mtg90
Too bad B&C does not have some specs posted for a...

Too bad B&C does not have some specs posted for a 4 ohm version of the 21DS115, the inuke 6000 isn't really enough to push one of those at 8 ohms to it's full potential. One downside of the 21DS115...
Forum: DIY Speakers and Subs   02-10-2017, 12:48 PM
Replies: 494
Views: 26,751
Posted By mtg90
Waveguide has screw holes for mounting, you just...

Waveguide has screw holes for mounting, you just screw it in. It would look nicer flush mounted into that kind of baffle but it does not need to be.
Forum: DIY Speakers and Subs   02-10-2017, 12:34 PM
Replies: 494
Views: 26,751
Posted By mtg90
Here is a simple mockup of that box, the top...

Here is a simple mockup of that box, the top angled section would be sealed off from the bottom, just a solid panel brace above the woofer would do it. You could make the enclosure square if you...
Forum: DIY Speakers and Subs   02-10-2017, 11:36 AM
Replies: 93
Views: 4,684
Posted By mtg90
Yes, Concentric-8's will work fine in an IB...

Yes, Concentric-8's will work fine in an IB configuration crossed at 80hz.
Forum: DIY Speakers and Subs   02-06-2017, 09:18 PM
Replies: 494
Views: 26,751
Posted By mtg90
Cheaper Titan falls between those two, note the...

Cheaper Titan falls between those two, note the 615 I am referring to in that quote is the nicer LX version. LX has an edge in HF detail over Fusion-15 or the regular Titan-615 which are fairly...
Forum: DIY Speakers and Subs   02-05-2017, 10:27 PM
Replies: 494
Views: 26,751
Posted By mtg90
Yes exporting measurements taken in REW as frd...

Yes exporting measurements taken in REW as frd files at the different angles and importing them into Omnimic. You do have to open up and remove the initial text info at the beginning of the REW FRD...
Forum: DIY Speakers and Subs   02-05-2017, 12:09 PM
Replies: 494
Views: 26,751
Posted By mtg90
There is no real minimum distance limitation,...

There is no real minimum distance limitation, unless you like to listen closer then 2-3 feet away. You can walk right up to the speaker if you stay even with the waveguide and the sound doesn't...
Forum: DIY Speakers and Subs   02-04-2017, 09:20 PM
Replies: 494
Views: 26,751
Posted By mtg90
Difference in recommended amp power is based on...

Difference in recommended amp power is based on xmax as both drivers have similar thermal limits, the driver in the LX having twice the xmax that of the Kappa-15LFA in the regular Titan-615. That...
Forum: DIY Speakers and Subs   01-30-2017, 10:49 PM
Replies: 494
Views: 26,751
Posted By mtg90
These are the T/S specs I measured. Mms: 98.7g ...

These are the T/S specs I measured.
Mms: 98.7g
Cms: 0.202mm/N
Re: 3.93 Ohms
Bl: 14.87
Le: 1.33mH
Qms: 6.474
Sd: 881cm^2
Xmax: 11mm (coil/2 - gap)
Program power rating: 1100w
Forum: DIY Speakers and Subs   01-30-2017, 10:21 PM
Replies: 494
Views: 26,751
Posted By mtg90
If you are using less then a 1000w per channel...

If you are using less then a 1000w per channel amp to power these think about upgrading your amp before adding more woofage.

No one powers an 18" sub with 150w and thinks "I should just add...
Forum: DIY Speakers and Subs   01-30-2017, 01:04 PM
Replies: 1
Views: 76
Posted By mtg90
Yes sort of, IEC 17.3 states the maximum voltage...

Yes sort of, IEC 17.3 states the maximum voltage (or power here) that the speaker will handle for a period of 1 minute without causing permanent damage.

Therefore the SA230 should be a good...
Forum: DIY Speakers and Subs   01-29-2017, 07:43 PM
Replies: 7
Views: 145
Posted By mtg90
0.17 cuft is fine for a sealed enclosure, 0.25...

0.17 cuft is fine for a sealed enclosure, 0.25 doesn't change the f3 point and only pushes the f6 point down maybe 4hz (from 101hz to 97hz).
Forum: DIY Speakers and Subs   01-29-2017, 12:34 PM
Replies: 7
Views: 145
Posted By mtg90
Cool idea. The magnet OD is 5-5/16" and the...

Cool idea.

The magnet OD is 5-5/16" and the back plate is 5" which makes up the final 1/4" or so. The depth of the driver minus the compression driver is 3" deep measured from the front gasket...
Forum: DIY Speakers and Subs   01-25-2017, 06:46 PM
Replies: 494
Views: 26,751
Posted By mtg90
Ideal position for the speaker is actually...

Ideal position for the speaker is actually slightly elevated so ear height falls somewhere between the compression driver and the bottom of the midrange horn.

During the design phase I had done...
Forum: DIY Speakers and Subs   01-25-2017, 09:36 AM
Replies: 494
Views: 26,751
Posted By mtg90
1/6th on that one.

1/6th on that one.
Forum: DIY Speakers and Subs   01-24-2017, 05:47 PM
Replies: 494
Views: 26,751
Posted By mtg90
The off axis measurements are just the mid/hi...

The off axis measurements are just the mid/hi section as it was easier to set just that on my speaker turntable. As the crossover is down around 350hz I expect the woofer radiation pattern will be...
Forum: DIY Speakers and Subs   01-24-2017, 01:50 PM
Replies: 494
Views: 26,751
Posted By mtg90
It's about 16.875".

It's about 16.875".
Forum: DIY Speakers and Subs   01-24-2017, 01:48 PM
Replies: 494
Views: 26,751
Posted By mtg90
There is about a 2dB drop in level at 30 degrees...

There is about a 2dB drop in level at 30 degrees off axis above ~600hz.

Here is the frequency response taken in 10 degree increments:...
Forum: DIY Speakers and Subs   01-24-2017, 01:29 PM
Replies: 494
Views: 26,751
Posted By mtg90
Yeah that drawing is not to scale, the waveguide...

Yeah that drawing is not to scale, the waveguide is a bit smaller and the woofer cabinet is larger then it shows.
Forum: DIY Speakers and Subs   01-24-2017, 12:15 PM
Replies: 494
Views: 26,751
Posted By mtg90
You can make a custom woofer cabinet that is...

You can make a custom woofer cabinet that is shorter or narrower assuming you keep the internal volume the same. The horn isn't designed to be placed in a speaker cabinet in the same airspace as the...
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