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Forum: Subwoofers, Bass, and Transducers   08-22-2014, 02:44 PM
Replies: 152
Views: 2,025
Posted By Mark Seaton
Sounds like you needed to simply reduce the...

Sounds like you needed to simply reduce the output on your receiver sub channel or MiniDSP input and then raise the level on your subwoofer volume dials. Digital clipping or clipping of the MiniDSP...
Forum: Dedicated Theater Design & Construction   08-22-2014, 02:18 PM
Replies: 103
Views: 5,921
Posted By Mark Seaton
Hi Peter, Minor clarification. The...

Hi Peter,

Minor clarification. The SubMersives are used in the system perfectly stock as we ship them. I believe Carl misunderstood the testing I had done with the QSC DSP-30. This was simply a...
Forum: Subwoofers, Bass, and Transducers   08-22-2014, 01:32 PM
Replies: 152
Views: 2,025
Posted By Mark Seaton
That 6-15dB range is related to different movie...

That 6-15dB range is related to different movie soundtrack content, not the room. There are some examples which don't have as much deep bass which will easily play at or near reference.

A very...
Forum: Subwoofers, Bass, and Transducers   08-22-2014, 11:28 AM
Replies: 152
Views: 2,025
Posted By Mark Seaton
I'm still catching up from some travel (see...

I'm still catching up from some travel (see thebland's room), but I wanted to quickly correct some of the misconceptions on this. It is especially rare to ever need full output at a single...
Forum: Dedicated Theater Design & Construction   08-21-2014, 05:54 AM
Replies: 103
Views: 5,921
Posted By Mark Seaton
Thank you Jeff for the kind words. It was an...

Thank you Jeff for the kind words. It was an adventure and a major effort, but the Dirac Live calibration gave exceptional results and the sound of your theater is awesome. I can't wait for others...
Forum: DIY Speakers and Subs   08-19-2014, 05:17 PM
Replies: 366
Views: 13,575
Posted By Mark Seaton
The original design was a 6th order bandpass...

The original design was a 6th order bandpass using an 18" PR and 15" driver. Itai, aka cubesys, who later founded iRule (http://www.seaton-sound-forum.com/post?id=2381183) has the first prototypes...
Forum: DIY Speakers and Subs   08-19-2014, 04:24 PM
Replies: 366
Views: 13,575
Posted By Mark Seaton
DSP can only change the incoming electrical...

DSP can only change the incoming electrical signal, not the physical resonance of a reflex port. The impedance measurements confirm a minimum at 11Hz, where visual observation with excursion & port...
Forum: Speakers   08-19-2014, 10:42 AM
Replies: 22,469
Views: 974,978
Posted By Mark Seaton
The AVR doesn't. The link relates to mastering...

The AVR doesn't. The link relates to mastering and playback across a wide range of spaces. Basically all "home" environments are assumed to fall in the same classification, and if your room does...
Forum: Subwoofers, Bass, and Transducers   08-19-2014, 10:19 AM
Replies: 152
Views: 2,025
Posted By Mark Seaton
Off the cuff I would try 1,2 & 5,6 to get the...

Off the cuff I would try 1,2 & 5,6 to get the best results with subs front & rear.

To get rid of the delay limitation and get more max output, I would try some combo of 5/6 , 3/4 and 11/12 as all...
Forum: Subwoofers, Bass, and Transducers   08-19-2014, 10:10 AM
Replies: 152
Views: 2,025
Posted By Mark Seaton
You might be able to double the available delay...

You might be able to double the available delay by taking the sub signal to input 1, output 1 to front sub or subs(split is no problem), then connect output 2 and connect it back to input 2 allowing...
Forum: Subwoofers, Bass, and Transducers   08-19-2014, 09:58 AM
Replies: 152
Views: 2,025
Posted By Mark Seaton
I won't have time to look thorugh the MDAT files...

I won't have time to look thorugh the MDAT files for a while. If you can post a screen capture or 2 I'd be happy to give some input. Based just on your comments I would suggest also testing the...
Forum: Speakers   08-19-2014, 09:02 AM
Replies: 22,469
Views: 974,978
Posted By Mark Seaton
It's important to remember the "why" driving this...

It's important to remember the "why" driving this recommendation. This stems from assumed similar acoustics vs a changing room size as would be likely in either commercial theaters or mixing rooms. ...
Forum: Speakers   08-18-2014, 10:32 PM
Replies: 22,469
Views: 974,978
Posted By Mark Seaton
No, I was responding to N8DOGG's fun razzing of...

No, I was responding to N8DOGG's fun razzing of the cost of parts. My point was that for a company to keep the lights on, provide support, be there for warranty, not loose money on the long term...
Forum: Speakers   08-18-2014, 06:02 PM
Replies: 22,469
Views: 974,978
Posted By Mark Seaton
The UM18 is a very well behaved driver based on...

The UM18 is a very well behaved driver based on the testing we've had time to do thus far in this and a few other test boxes. dlbeck popped in while we were testing these drivers in the never...
Forum: Subwoofers, Bass, and Transducers   08-18-2014, 02:42 PM
Replies: 152
Views: 2,025
Posted By Mark Seaton
Good to hear you sorted that oddity out. Now...

Good to hear you sorted that oddity out. Now turn off Audyssey and take the measurements I suggested. Without keeping the drive level to each sub the same, you can't tell what locations are more...
Forum: Subwoofers, Bass, and Transducers   08-18-2014, 01:14 PM
Replies: 37
Views: 2,605
Posted By Mark Seaton
I was sorting through some more measurements...

I was sorting through some more measurements before I meet up with Carl Huff to help while he does the Dirac Live calibration. Earlier some noted that the main/middle row looked quite good on its...
Forum: Speakers   08-17-2014, 02:09 PM
Replies: 22,469
Views: 974,978
Posted By Mark Seaton
Contributing toward a more on-topic discussion: ...

Contributing toward a more on-topic discussion:

Obviously opinions vary, but based on lots of real world measurement and setup of different systems, if I planned a sub system I would only mix...
Forum: Speakers   08-17-2014, 02:02 PM
Replies: 22,469
Views: 974,978
Posted By Mark Seaton
I thought this was a JTR thread? ;) ...

I thought this was a JTR thread? ;)

http://www.smiley-lol.com/us/random/415.gif
Forum: Ultra Hi-End HT Gear ($20,000+)   08-15-2014, 05:10 PM
Replies: 595
Views: 22,903
Posted By Mark Seaton
Circuit breakers can easily pass short bursts of...

Circuit breakers can easily pass short bursts of 3-10x their rating, and we care about the power required to drive subwoofers here, not how much is pulled from the wall. With the SpeakerPower...
Forum: Subwoofers, Bass, and Transducers   08-14-2014, 01:40 PM
Replies: 152
Views: 2,025
Posted By Mark Seaton
OK, that helps clarify a lot. Measure...

OK, that helps clarify a lot.



Measure each with the same settings and everything bypassed/zeroed in the MiniDSP. The measurements of each sub will let us see what each location is...
Forum: Subwoofers, Bass, and Transducers   08-13-2014, 10:07 AM
Replies: 152
Views: 2,025
Posted By Mark Seaton
Hi Alan, I suspect the need to boost the...

Hi Alan,

I suspect the need to boost the level more with the front/rear locations comes from the dip in the middle of the front sub response causing Audyssey to set the level a little higher since...
Forum: Subwoofers, Bass, and Transducers   08-12-2014, 12:09 PM
Replies: 37
Views: 2,605
Posted By Mark Seaton
It was a seriously imposing assembly. You can...

It was a seriously imposing assembly. You can see much more detail on that sub (which I had called the Devastator) here on the WBF...
Forum: Subwoofers, Bass, and Transducers   08-12-2014, 10:31 AM
Replies: 37
Views: 2,605
Posted By Mark Seaton
Here is another good visualization normalized to...

Here is another good visualization normalized to the middle row/main seat. First the graph from above of the actual response at each row.
...
Forum: Ultra Hi-End HT Gear ($20,000+)   08-11-2014, 05:43 PM
Replies: 595
Views: 22,903
Posted By Mark Seaton
Each subwoofer has 2, 15" drivers powered with...

Each subwoofer has 2, 15" drivers powered with 1000W per woofer. There is one stack of 2 cabinets (4x15" drivers) in the rear right corner, and 4 cabinets (8x15" drivers) under/behind the baffle...
Forum: Subwoofers, Bass, and Transducers   08-11-2014, 03:32 PM
Replies: 37
Views: 2,605
Posted By Mark Seaton
Since I realized the front vs. rear location...

Since I realized the front vs. rear location benefit was not very clear in the previous graphs I found a measurement I saved of 2 SubMersives at the front middle of the room vs the 2 at the rear...
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