mfine
I don't want Mike to feel all alone in this forum so I will offer a few posts on my HT project.

Lets start with a FR graph.  This was measured with REW with a test tone level of 75 db.



As you can see the -3db point is at 43 hz and I am at -10 by 40 hz.  Obviously the Submersive is not giving very good extension in my room compared to what other people are seeing.  The primary reason for this is that the Submersive is not actually in the room yet

Hopefully I will be posting an updated graph next week.  Pictures will follow when I get all the crap out of the way to start painting. 
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MikeDuke
OK.  That made me smile this morning.  So you are you expecting it next week? 
I simply love this stuff.
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mfine

I was originally expecting it the week of 8/13, but I have learned to never trust delivery estimates from audio companies owned by a guy named Mark S.  At least with Seaton the extra wait is a few weeks and not a few years like that other place I frequent.   I now have a tracking number from DHL, so it should be on its way soon.  With the holiday, I may or may not get it by the end of next week, but I am hopeful.

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mfine
The Submersive is finally in transit.  MS says he expects I will get it on Monday 9/10, while DHL is significantly more optomistic with an estimated delivery date of 8/31/2007.  I think DHL needs to impliment a drug testing policy in their package tracking department.  FWIW, my bet is a delivery date of Tuesday 9/11. 

Figure another day or two to capture "before" graphs.  Then I need to put in the room treatments and finally EQ.  My Rockboard should be here any year now (another delivery expected mid August that slipped a little and then a little more) and then I have to cover it in the designer fabric my wife selected over the convieniently pre assembled alternatives.  Finally, after I see what kind of results I get, I will select the appropriate EQ solution to finish it off.  Expect graphs of the response with no treatments or EQ, then with treatments and then "final" results, as well as pictures to all be posted here by January.  I am not saying which year though  
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MikeDuke
Very Very nice.  Hope it all goes smooth for you.  I am looking forward to hearing your thoughts and impressions once you get it set up.  How big is your room again?
I simply love this stuff.
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mfine

The room is about 24' wide by 17' across, with an additional bump out that is about 8'x9'.  The ceilings are 8'. 

I am hoping to get enough room gain to get by with just one Submersive for now since I am WAY over budget on the project already and the wife will not be happy with 4-8 black boxes all over the place   I figure I should definitely have enough output from 20hz-80hz and probably 5-8 hz below that.  It is the 8-15 hz range I am most worried about, but there is no way to know until it shows up and I run a few sweeps.  Not that I NEED to have reference level output at 8 hz, but if you are on this forum you know how it is


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MikeDuke

I don't think you will have a problem filling that room.  You should get down to below 15Hz without much effort.  I have a room that is about 1/3 that size.  I wish I had a bigger room.  Looking forward to see how the sub works in that room.

I simply love this stuff.
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mfine
I like the having the space, but since I am painting it right now (myself...what was I thinking????) I wish it was smaller!
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mfine
I figured out how to get a clean measurement below 20 hz with my laptop.  The results can be summed up in 2 words......

HOLY F!#@!!!!!!!!!!!!!!!!!

Log and linear scales;







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MikeDuke
Looks good to me.  I have yet to measure bellow 15Hz myself, but if you look at the measurements I made and Mark made you will see that I still have very nice output down to at least 8hz.  I know, its freaky when you see it go that low. 
I simply love this stuff.
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TheRick

HOLY CR*P!      No wonder there has been structural damage to people's rooms.      LOL!  I can hardly wait!!!!     Credit card is burning a hole in my pocket now!   LOL!

Proud Submersive Owner! "Shakin the Midwest!"
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mfine
Finally some progress is being made!

The ceiling is painted in a lovely shade called Mesa from C2.  it is a tan color that is not too dark to piss off the misses, but it reflects much less light than standard white.  The 12 foot long mirror is off the wall as are the cabinets and I may get the first coat of Chocolate Therapy on the walls before the neighbors Halloween party tonight.

Even better news, my 56 cuft of 6lb/cuft room treatment panels are on the way and should arrive in the second half of next week.  These will turn into 4" thick treatments on the front wall, on the ceiling corner above the screen, and reflection points on the side and back wall (12 4'x2'x4" equivalents).  The rest will probably turn into the equivalent of 6 6" bass traps.  2 will angle off the front wall behind the main speakers, 4 will treat the rear corners.  REW should come in real handy for this, and while final assembly will be a PITA, the ability to try different configs and MEASURE in room before I settle on a config will be pretty cool.  OK OK the real reason I went DIY for the room treatments is my wife did not like any of the 200+ patterns available on ATS, GIK or other commercial products so I will be wrapping them in black velvet for the screen surround and designer fabric for the walls.  It is a small price to pay to get permission to do whatever else I wanted in the room, including the SubMersive

Once the room treatments are at least temporarily in place, I will be able to finally break out the EQ and start to get things dialed in.  Heck its only been 2 months



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MikeDuke

Glad to hear that there is progress being made.  Hopefully soon everything will be in its place, eq'ed and room treatments up.  Looking forward to hear your thoughts when everything is in its place.  Two months is not that long.  I did not have mine installed for several months after I went out to see Mark in Vegas.  Not a complaint.  It is just a test of your resolve.  Keep us posted.

I simply love this stuff.
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mfine
My problem is I had to do a "proof of concept" first.  So I hung the screen and projector and did a quick setup of the sub.  Then I had to watch a movie or two or 12 or...  Ya know just to make sure it will be OK!  When you come home from work and get the kids fed and in bed and you have a choice of painting, or watching a movie for 2 hours, somehow painting never seems to win
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mfine
Rick got the itch going in me so I pulled out the EQ to play even though I wanted to treat the room first.  Here is a quick stab at it....



The door was closed like the red line in my earlier graphs, but we moved a lot of furniture (including sub and mike) so above 20 things were a bit different.
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TheRick

i'm guessing this is an eq'd graph.   It looks good.    Was that with or without your mains and center channel?  That's my next step.  UGH!  

Proud Submersive Owner! "Shakin the Midwest!"
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MikeDuke
That looks very nice indeed.  Looks pretty smooth as well.  Just a few dips and peaks but all in all very nice.  So that is without treatment?  With treatment you should look even better.  Great job.
I simply love this stuff.
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mfine
That is EQ'd with the mains on in stereo (no center).  I started with the mains off but I had to plug them back in to level match and I ended up changing one of the filters so my "sub only" curves are not valid anymore.

Honestly, I do not expect to get any flatter with treatments although I may have to change filters a bit (well, I will after the furniture gets re-arranged again since we are still painting etc).  The biggest impact from the treatments should be with the decay times and the perceived quality of the sound. 

Also, even 6" traps in the corners don't absorb too much below 50 hz and in general, absorbtion pannels make the biggest difference in the 100-2000hz range. 
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MikeDuke
Like I said, it looks real nice as is.  I am not sure anything else has to be done. But I think you are right about rechecking when the furniture gets moved.  All in all it looks sweet.  But how does it sound?
I simply love this stuff.
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mfine

LOL, I have no idea how it sounds!  I ran the sweeps fairly late and I didn't have time to sit down and listen to any music and movies.  Not gunna happen tonight either being Halloween and all.

I definitely need to re do the EQ because the listening possition and the sub are among the things that will move again. 

It is interesting how my response looks a lot like yours and ricks now, especially the way it drops around 15 and then flattens out.

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TheRick

I noticed that too.  LOL!   That was the part of the response that Mark thought looked strange (I think).  It's sweet how it's almost perfectly flat from 7hz to 15hz.     He needs to change the specs on his sub since he has three seperate cases that show it to be flat in the region. 

Proud Submersive Owner! "Shakin the Midwest!"
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MikeDuke
To me, that is one of the incredible things about this sub.  The fact that all of the responses look similar.  Our rooms are not the same that is for sure.  Granted, they are eq'ed, but still.  It jives with Mark initially said about getting output consistently in the single digits in most enclosed rooms.
I simply love this stuff.
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TheRick
It's pretty sweet!     It certainly doesn't drop off like my old subs did. 

Now if I can get it all integrated together...I can start bragging.    

I was trying some of those movies scenes from the "bass list" on avsforum, and even though they say they go down to 10hz or lower....i can't really feel anything.  I guess my seats are absorbing it all.  LOL 


Proud Submersive Owner! "Shakin the Midwest!"
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mfine
You have to play very very loud to feel the single digit stuff.  Try again at reference, maybe with ear plugs in

I was listening to an organ recording where there is an extended 8 hz pipe section ( I think from Australia) and a turning it down about 6 db made a huge difference between barely noticing it was there and that erie feeling of the room being preasurized even though you don't hear anything but distortion and rattling.  At 8 hz you can clearly see the drivers movement so you can turn it down a bit and see the drivers moving like crazy but you can not hear it at all.  Even loud you will not really feel the couch moving at 8 hz, that is more like 20+ if not 30+, as I said it is more of an erie feeling that is hard to describe.  Too much of it will even make you feel sick afterwards

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TheRick

I noticed that I "hear" more bass then I feel now.  I can just tell something deep is happening.  I tried out the WOTW scene last night and it was getting ugly in my room.     Two more Submersives and I should be set.  LOL!

Proud Submersive Owner! "Shakin the Midwest!"
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