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Search: Posts Made By: mtg90
Forum: DIY Speakers and Subs   08-24-2015, 09:58 AM
Replies: 132
Views: 6,237
Posted By mtg90
With the woofer near the floor you get boundary...

With the woofer near the floor you get boundary reinforcement that makes up for the baffle step losses at low frequencies. You should be able to hit reference with a decent AVR, though that is...
Forum: DIY Speakers and Subs   08-21-2015, 09:42 PM
Replies: 106
Views: 2,051
Posted By mtg90
That is not what I am saying at all. When...

That is not what I am saying at all.

When multiple subs are properly setup they will tend to smooth the overall response vs. only one sub, especially when multiple listening positions are...
Forum: DIY Speakers and Subs   08-21-2015, 12:42 PM
Replies: 106
Views: 2,051
Posted By mtg90
When setting delays you need to look at both...

When setting delays you need to look at both individual responses and the combined response and choose the point with the best constructive summation of the two sources not the flattest response. Eq...
Forum: DIY Speakers and Subs   08-19-2015, 10:16 AM
Replies: 3
Views: 194
Posted By mtg90
Yeah that is the main difference. They should...

Yeah that is the main difference. They should also be shipping with a newer crossover design that notches the woofer breakup and smooths out the response in the crossover region a bit.
Forum: DIY Speakers and Subs   08-17-2015, 09:02 PM
Replies: 55
Views: 1,571
Posted By mtg90
There might be something along those lines coming...

There might be something along those lines coming down the pipeline. ;)

Though 6.7" is a tight squeeze, box would need to be totally custom.
Forum: DIY Speakers and Subs   08-17-2015, 08:59 PM
Replies: 106
Views: 2,051
Posted By mtg90
Looking good! Might want to add some delay...

Looking good!

Might want to add some delay to these in order to time align them with the front subs. Without it sound from nearfield subs will reach you before the front subs or speakers and...
Forum: Speakers   08-07-2015, 03:25 PM
Replies: 2,637
Views: 110,108
Posted By mtg90
Well the low pass is a bit steeper on my designs...

Well the low pass is a bit steeper on my designs vs. stock (xo is a little lower for the 215 also) but yes much of what I did could be applied externally eq whether that be manual or automatic.
Forum: Speakers   08-07-2015, 08:50 AM
Replies: 2,637
Views: 110,108
Posted By mtg90
I agree the poly diaphragm is likely a better...

I agree the poly diaphragm is likely a better choice, I have to wonder if they switched them at some point and never updated the info?

Yes the two 6uF caps are in parallel.
Forum: Speakers   08-07-2015, 08:41 AM
Replies: 2,637
Views: 110,108
Posted By mtg90
Here are the quick crossover changes I have made...

Here are the quick crossover changes I have made to the stock designs that do not drastically change the crossover allowing use of the same board and many of the same parts. These changes will not...
Forum: Speakers   08-07-2015, 08:16 AM
Replies: 2,637
Views: 110,108
Posted By mtg90
Some pictures, B215XL vs. B212XL: ...

Some pictures, B215XL vs. B212XL:
https://lh3.googleusercontent.com/V4JWjxlV9DfbVG3G3e4Dzpaph0uwjdAe94xRE-604zQ=w968-h648-no

Inside the B212XL with woofer removed (B215XL looks similar):...
Forum: Speakers   08-07-2015, 07:56 AM
Replies: 2,637
Views: 110,108
Posted By mtg90
Post B212XL Measurements

On axis SPL & Phase @ 1m & 2.83v 4pi:
https://lh3.googleusercontent.com/Ho0TP_v8UjfxcnpzfWodKGuGfA4trb3WzS7MzaF3qhg=w1007-h468-no


Distortion 2.83v 1m indoors:...
Forum: Speakers   08-06-2015, 12:11 PM
Replies: 2,637
Views: 110,108
Posted By mtg90
I did design some changes to the crossover for...

I did design some changes to the crossover for the 215 & 212, both just making minor changes to the current crossover so that it can use the same board with little work and few new parts. I'll post...
Forum: Speakers   08-05-2015, 03:38 PM
Replies: 2,637
Views: 110,108
Posted By mtg90
Post B215XL Measurements

The B215XL measurements, here we go.

On axis SPL & Phase @ 1m & 2.83v 4pi:
https://lh3.googleusercontent.com/uvRWj4PJlJ9cP9041by9dGzfu85VKIXtcw9UAVW2lRk=w1007-h468-no

Distortion 2.83v 1m...
Forum: Speakers   08-05-2015, 12:18 PM
Replies: 2,637
Views: 110,108
Posted By mtg90
All the measurements are done. On/off axis for...

All the measurements are done. On/off axis for the B212XL & B215XL. Crossovers reverse engineered. Individual driver measurements with/without the crossover. I'll provide crossover files for XSim...
Forum: DIY Speakers and Subs   08-05-2015, 09:25 AM
Replies: 4
Views: 114
Posted By mtg90
Yep, here is direct link as well: ...

Yep, here is direct link as well:
http://www.behringerdownload.de/iNuke/iNukeRemoteConnect_V1.4.zip
Forum: Speakers   07-29-2015, 08:42 PM
Replies: 2,637
Views: 110,108
Posted By mtg90
I too have all the gear needed to measure the...

I too have all the gear needed to measure the speaker and was thinking about purchasing one to test or asking Mike to borrow one for measurements. I was close to purchasing one during the amazon...
Forum: Speakers   07-29-2015, 08:32 PM
Replies: 2,637
Views: 110,108
Posted By mtg90
Sorry, I see the confusion and cleaned it up. I...

Sorry, I see the confusion and cleaned it up. I was not trying to say the room totally changes how a speaker sounds but rather can impart changes in preference between different well designed...
Forum: Speakers   07-29-2015, 05:53 PM
Replies: 2,637
Views: 110,108
Posted By mtg90
I do not believe this is true. The influence of...

I do not believe this is true. The influence of the room can certainly swing a subjective vote one way or another depending upon how well the acoustic aspects of the room match with those of the...
Forum: DIY Speakers and Subs   07-25-2015, 09:33 PM
Replies: 25
Views: 443
Posted By mtg90
Just to make clear, all three signal lights come...

Just to make clear, all three signal lights come on and the top red clip (limit) light?
Forum: DIY Speakers and Subs   07-24-2015, 08:57 AM
Replies: 7
Views: 350
Posted By mtg90
You can build them out of the cabinet material to...

You can build them out of the cabinet material to any length and cross sectional area desired. Round ports often do not come in the sizes or lengths needed and can be more difficult to fit into the...
Forum: Speakers   07-18-2015, 10:40 PM
Replies: 2,637
Views: 110,108
Posted By mtg90
So xmax is roughly 4mm which is not bad.

So xmax is roughly 4mm which is not bad.
Forum: Speakers   07-18-2015, 10:26 PM
Replies: 2,637
Views: 110,108
Posted By mtg90
If you can measure the overall height of the coil...

If you can measure the overall height of the coil winding and the top plate or gap (metal plate that sits between ferrite magnet and frame). Should be able to use those two figures to get a general...
Forum: DIY Sound Group - Loudspeakers and Subwoofers   07-18-2015, 12:34 PM
Replies: 16
Views: 480
Posted By mtg90
That small capacitor goes where the LO Parallel...

That small capacitor goes where the LO Parallel marking is on the board, it's wired in parallel with the inductor for the woofer. It looks like you may have inserted the lead for that inductor into...
Forum: DIY Speakers and Subs   07-15-2015, 09:39 PM
Replies: 13
Views: 488
Posted By mtg90
50v input free air at 20hz will be where the...

50v input free air at 20hz will be where the suspension starts to make a little bit more noise, I think this also puts it roughly at Xmax. A good driver should take 65v without any rubbing/tapping...
Forum: DIY Speakers and Subs   07-15-2015, 07:29 PM
Replies: 13
Views: 488
Posted By mtg90
I think they may be have some quality control...

I think they may be have some quality control issues on their latest batch. Hopefully PE's customer service gets you a good one without too much trouble.

I have tested quite a few of these...
Showing results 1 to 25 of 1118

 
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