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post #91 of 602 Old 11-04-2010, 09:48 AM - Thread Starter
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Originally Posted by Dixon View Post

That makes sense to me. If the room is sealed concrete, including the ceiling, I suspect the only leakage concern (apart from any holes you cut in it) would be something clicking/banging on the concrete. That doesn't appear to be an issue for you.

Thx. Cool space.

No worries, like I said I am no expert and it good to be kept on my toes.

My build thread

My 8 x RE XXX 18" Subwoofers, IB build
Couldn't pour water out of a boot with instructions on the heel.

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post #92 of 602 Old 11-04-2010, 10:06 AM
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Thanks for all the pics, great detail on the building methods.

When the acoustic plan for the room was being developed was your input sought when determining a target RT60 for the room or was it left completely with the designer? I find it impressive and speaks highly of the skill of the desginer that a complete arms length acoustical plan can be developed to achieve set goals including satisfactory RT60 plot. To that end is specific seating and carpeting also outlined in the HT plan? Also, are there provisions when the build is complete for an acoustic testing phase which would identify any areas which may require a few wiggle changes for the ratio of aborption/reflection/diffusion?

Anyways, outstanding build and design.
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post #93 of 602 Old 11-04-2010, 04:20 PM - Thread Starter
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Hey Hughman, thanks for stopping by.

The acoustics were left completely up to the designer, I am just assuming that the desirable RT60 is within a certain range and Dennis made the plans accordingly. Something that I have not thought about, but Dennis has said that there is a lot of absorption in the room and I should not have a problem with the very low frequencies. I know that is open for interpretation, but I plan on taking measurements(This is not included in the agreement, but if changes or adjustments are needed I am sure I will have Dennis's help in one way or another.)

As for the carpet, specific carpet and underlay are part of the initial designs. Seating type was not talked about except the number of seats that was going to be used.

Thanks for the words of encouragement

My build thread

My 8 x RE XXX 18" Subwoofers, IB build
Couldn't pour water out of a boot with instructions on the heel.

Do you know what Nemesis means?

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post #94 of 602 Old 11-04-2010, 05:26 PM
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It is very difficult to ever consider seating within the context of acoustics in a residential sized room. The biggest single show stopper is that none of the available home theater seats or recliners have been measured under various conditions...yet

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post #95 of 602 Old 11-04-2010, 06:23 PM - Thread Starter
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Quote:
Originally Posted by Dennis Erskine View Post

It is very difficult to ever consider seating within the context of acoustics in a residential sized room. The biggest single show stopper is that none of the available home theater seats or recliners have been measured under various conditions...yet

Dennis , very good point, especially since my room is not considered big.

Edit: I also wanted to add, that it would be pretty difficult for Dennis to make appropriate measurements when I am here in Japan, especially not knowing what equipment I have.

My build thread

My 8 x RE XXX 18" Subwoofers, IB build
Couldn't pour water out of a boot with instructions on the heel.

Do you know what Nemesis means?

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post #96 of 602 Old 11-04-2010, 06:42 PM
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Quote:
Originally Posted by Dennis Erskine View Post

It is very difficult to ever consider seating within the context of acoustics in a residential sized room. The biggest single show stopper is that none of the available home theater seats or recliners have been measured under various conditions...yet

Yet.


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post #97 of 602 Old 11-04-2010, 07:12 PM
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Great information, thanks. Regarding the post build acoustic analysis I was thinking along the lines of what you are planning to do. Do the measurements yourself following explicit instructions from the designer and he/she would interpret the results and outline any necessary tweaks if required.

"and I should not have a problem with the very low frequencies"

Seeing what subs you're installing the only problem I would anticipate is your eardrums exploding and lodging malleus shrapnel in your brain, other than that you should be fine.
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post #98 of 602 Old 11-04-2010, 07:36 PM - Thread Starter
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Quote:
Originally Posted by Hughman View Post

Great information, thanks. Regarding the post build acoustic analysis I was thinking along the lines of what you are planning to do. Do the measurements yourself following explicit instructions from the designer and he/she would interpret the results and outline any necessary tweaks if required.

"and I should not have a problem with the very low frequencies"

Seeing what subs you're installing the only problem I would anticipate is your eardrums exploding and lodging malleus shrapnel in your brain, other than that you should be fine.

That sounds like a great plan. Of coarse I recommend Dennis to do you designs, very professional and his responses to any queries I had were answered very quickly. I really did have piece of mind when finalizing everything from the designs to payment, considering I am here in Japan. Something I have not actually thanked Dennis for yet. Of I understand it is entirely up to you, just wanted to share my experiences.

I forgot to mention these 2 of these dual firing 15" Submersives will also be incorporated into the room, so I will have 4 sub enclosures in room. The Submersives will be going at the back of the room.


My build thread

My 8 x RE XXX 18" Subwoofers, IB build
Couldn't pour water out of a boot with instructions on the heel.

Do you know what Nemesis means?

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post #99 of 602 Old 11-04-2010, 08:00 PM
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Yes, that arrangement should suffice. Has sub placement also been predetermined?
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post #100 of 602 Old 11-04-2010, 08:10 PM - Thread Starter
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Quote:
Originally Posted by Hughman View Post

Yes, that arrangement should suffice. Has sub placement also been predetermined?

Only the front two behemoths. The two submersives are going to go somewhere in the region of 24" to 50" from the back wall as close to the side wals as they are allowed to go. Mark (Seaton) is expecting a dip in the 35-50hz region at the seating postion and they will be there to cover that.

We have discussed crossing the Terraforms XL'S around that frequency and allowing the submersives to handle the upper bass in the LFE. I don't really have anything set in stone yet , as I want to hear the system set up and measure it to see what needs to be done.

My build thread

My 8 x RE XXX 18" Subwoofers, IB build
Couldn't pour water out of a boot with instructions on the heel.

Do you know what Nemesis means?

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post #101 of 602 Old 11-04-2010, 08:23 PM
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Good plan, very similar to how I ended up utilizing my subs.

On another note, the word "Malleus" (inner ear hammer) would be a great speaker company name, speaker name, subwoofer name or theater name. Should anyone reading this decide to use this name I would expect certain considerations.
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post #102 of 602 Old 11-04-2010, 08:39 PM - Thread Starter
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Quote:
Originally Posted by Hughman View Post

Good plan, very similar to how I ended up utilizing my subs.

On another note, the word "Malleus" (inner ear hammer) would be a great speaker company name, speaker name, subwoofer name or theater name. Should anyone reading this decide to use this name I would expect certain considerations.

I just hope I have the smarts to implement this plan!

Now you mention it, I still have not named my theater. Maybe I should let my 6 year old son decide.

My build thread

My 8 x RE XXX 18" Subwoofers, IB build
Couldn't pour water out of a boot with instructions on the heel.

Do you know what Nemesis means?

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post #103 of 602 Old 11-04-2010, 09:04 PM
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Quote:
Originally Posted by JapanDave View Post

Only the front two behemoths. The two submersives are going to go somewhere in the region of 24" to 50" from the back wall as close to the side wals as they are allowed to go. Mark (Seaton) is expecting a dip in the 35-50hz region at the seating postion and they will be there to cover that.

We have discussed crossing the Terraforms XL'S around that frequency and allowing the submersives to handle the upper bass in the LFE. I don't really have anything set in stone yet , as I want to hear the system set up and measure it to see what needs to be done.

That's an interesting setup. I have immovable IB subs at the front and slightly movable sealed subs at the rear -- both subs are close to the center line of the room. I'm not ready to perform final calibration but recently I purchased a Berhinger DCX2946 to allow messing with time/phase alignment and equalization of the pairs of subs whilst using REW's RTA monitor to watch the effects. It's fascinating stuff and I would be interested on more details on how you approach this.

BTW As somebody who is 18 months into my HT I'm having fun watching the speed of your build!

Cheers!

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post #104 of 602 Old 11-04-2010, 09:18 PM - Thread Starter
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Quote:
Originally Posted by Moggie View Post

That's an interesting setup. I have immovable IB subs at the front and slightly movable sealed subs at the rear -- both subs are close to the center line of the room. I'm not ready to perform final calibration but recently I purchased a Berhinger DCX2946 to allow messing with time/phase alignment and equalization of the pairs of subs whilst using REW's RTA monitor to watch the effects. It's fascinating stuff and I would be interested on more details on how you approach this.

BTW As somebody who is 18 months into my HT I'm having fun watching the speed of your build!

Cheers!

Just want to say again that your build is amazing!

I will do my best to post everything I end up doing when crossing these subs. I know it is going to take a long time to get the right position of the subs and crossover. By then I hope I will have enough knowledge to give some good advise.

It is moving fast, but preparations for it nearly total one year and that includes getting materials and making them.

My build thread

My 8 x RE XXX 18" Subwoofers, IB build
Couldn't pour water out of a boot with instructions on the heel.

Do you know what Nemesis means?

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post #105 of 602 Old 11-05-2010, 02:33 AM
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Cool, Gota see how this one comes out...Subbed !!!!

Looks good so far....

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post #106 of 602 Old 11-05-2010, 04:44 AM
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Quote:
Yet.

The "fix" is underway but I'll say nothing beyond that.

Quote:
I just hope I have the smarts to implement this plan!

...always up for a trip to Japan.

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post #107 of 602 Old 11-05-2010, 05:36 AM - Thread Starter
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Quote:
Originally Posted by Dennis Erskine View Post

The "fix" is underway but I'll say nothing beyond that.


...always up for a trip to Japan.

If that is the case, I am always up to have a guest. Maybe we can talk about this some more.

My build thread

My 8 x RE XXX 18" Subwoofers, IB build
Couldn't pour water out of a boot with instructions on the heel.

Do you know what Nemesis means?

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post #108 of 602 Old 11-05-2010, 05:44 AM - Thread Starter
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More updates.

The screen wall is done, minus the black acoustically transparent fabric. Also if you look at previous pics there were orange conduits. Finally got them cleaned up and out of site.



A shot from the side, sorry for all the junk.



A shot above the screen with the acoustic treatments and fabric in place. Forgive the plastic, the room is still really dusty.



The original lights removed and ready to have covers placed on them.



All the sofits acoustic treatments are complete with the fabric in place. Just have to get the wood trim sorted and attached and they will be done, minus the lights.



Apic of the material I used for the sofits,


My build thread

My 8 x RE XXX 18" Subwoofers, IB build
Couldn't pour water out of a boot with instructions on the heel.

Do you know what Nemesis means?

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post #109 of 602 Old 11-05-2010, 09:27 AM
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Wow!

I can hardly wait to here about the (?) Dennis visit and graphs of FR curves.

Mike
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post #110 of 602 Old 11-05-2010, 05:14 PM - Thread Starter
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Originally Posted by Mike_WI View Post

Wow!

I can hardly wait to here about the (?) Dennis visit and graphs of FR curves.

Mike

I just hope Dennis likes beer, b/c nothing beats Japanese beer IMO.

BTW, the painters are in today the paint the sound proof doors and anything else that needs it.

My build thread

My 8 x RE XXX 18" Subwoofers, IB build
Couldn't pour water out of a boot with instructions on the heel.

Do you know what Nemesis means?

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post #111 of 602 Old 11-05-2010, 05:34 PM
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Is the door as narrow as it looks in the photo?

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post #112 of 602 Old 11-05-2010, 06:57 PM - Thread Starter
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Is the door as narrow as it looks in the photo?

It certainly is. Would you like me to take a pic of what is behind there? BTW, that is not the entrance, it is an access door for a room full of filters for my 2000g fish tank upstairs.

I will post a pic of the tank in the living room.

My build thread

My 8 x RE XXX 18" Subwoofers, IB build
Couldn't pour water out of a boot with instructions on the heel.

Do you know what Nemesis means?

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post #113 of 602 Old 11-05-2010, 06:58 PM - Thread Starter
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Originally Posted by W00lly View Post

Dave

Looking good

How is your HT space in relation with the rest of the house it looks like a bunker but all the better to crank up those Subs.

The rest of the house is a bunker too! A bunker with windows!

My build thread

My 8 x RE XXX 18" Subwoofers, IB build
Couldn't pour water out of a boot with instructions on the heel.

Do you know what Nemesis means?

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post #114 of 602 Old 11-05-2010, 08:26 PM
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I will post a pic of the tank in the living room.

Please do!

Ah ok, I thought that was the entry door

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post #115 of 602 Old 11-05-2010, 10:05 PM - Thread Starter
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Here is a close up pic of the 2000g tank. The biggest fish on the left is about 3' long for size reference.

Balbolito likes this.

My build thread

My 8 x RE XXX 18" Subwoofers, IB build
Couldn't pour water out of a boot with instructions on the heel.

Do you know what Nemesis means?

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post #116 of 602 Old 11-05-2010, 10:57 PM
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I just hope Dennis likes beer, b/c nothing beats Japanese beer IMO.

you obviously havent been to germany then!

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post #117 of 602 Old 11-05-2010, 11:16 PM
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Or Belgium then...
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post #118 of 602 Old 11-05-2010, 11:47 PM
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No beer, Japanese is all about sake, sushi and geisha ...
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post #119 of 602 Old 11-05-2010, 11:52 PM
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Or Belgium then...

thats my second favorite!!!!!

too much choice though in belgium, apparently they have the most variety in the world. thank all the monks for that.

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post #120 of 602 Old 11-06-2010, 03:08 AM
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That is totally cool.......how much time do you spend cleaning it? or does the filtration system look after it?

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