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post #61 of 143 Old 07-02-2010, 05:38 AM
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Probably not the thread to do it in, but could you explain what the low pass filter does for the listener?
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post #62 of 143 Old 07-02-2010, 05:41 AM - Thread Starter
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If it quacks like a bass trap, walks like a bass trap, it probably is a bass trap (without over absorption of higher frequencies).

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post #63 of 143 Old 07-02-2010, 06:19 AM
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post #64 of 143 Old 07-02-2010, 03:42 PM - Thread Starter
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Closing up for the 4th. y'all have a great holiday y'hear now.
LL
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LL

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post #65 of 143 Old 07-02-2010, 06:28 PM
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Dennis in regards to cables do you buy "finished goods" or to you roll your own?

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post #66 of 143 Old 07-02-2010, 07:50 PM - Thread Starter
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We custom terminate all our cables (except HDMI). Our primary cable is Planet Waves.

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post #67 of 143 Old 07-03-2010, 03:37 AM
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Quote:
Originally Posted by Dennis Erskine View Post

Our primary cable is Planet Waves.

Good stuff!

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post #68 of 143 Old 07-03-2010, 05:14 AM
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Quote:
Originally Posted by Dennis Erskine View Post

If it quacks like a bass trap, walks like a bass trap, it probably is a bass trap (without over absorption of higher frequencies).

Interesting - I recall you talking about using pegboard a LONG time ago, but have never seen it in any recent rooms, in fact never "seen" you use it full stop - does a shiny QuestAI product sit over this or is that it?

Quote:
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Our primary cable is Planet Waves.

So for "ordinary" speaker cable you use these guys?

Mind if I asky why them over the million other brands on the market? I am still a little confused about what to look for in "good" speaker cable

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post #69 of 143 Old 07-03-2010, 05:31 AM - Thread Starter
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What I use, where I use it all depends upon the engineering requirements of each room. "Stuff" will go over the PB. PB was used in the THX Certified project, but incorporated into panels so you never saw it.

We do not use Planet Waves for speaker cable. For that we use a 12 AWG multi-stranded cable (typically from Liberty Wire & Cable). The electrical requirements are pretty straight forward ... the quality of the sheath (like for pulling through walls, however) is a different matter.

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post #70 of 143 Old 07-03-2010, 06:05 AM
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Dennis,

I really love that ceiling. Cannot wait to see the finished project. If I ever win the lottery (which I don't play) you will be getting a call from me....
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post #71 of 143 Old 07-03-2010, 08:33 AM - Thread Starter
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We do clean up the job site before we leave.
LL

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post #72 of 143 Old 07-03-2010, 02:04 PM
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Quote:
Originally Posted by Dennis Erskine View Post

We do clean up the job site before we leave.

One of the characteristics that helps distinguish the professionals from the amateurs. Thank you for sharing this project.
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post #73 of 143 Old 07-04-2010, 07:09 AM - Thread Starter
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Here's a panorama of the room. (just a cheap trick to bump the thread)
LL

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post #74 of 143 Old 07-05-2010, 12:33 PM
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I also love that ceiling, I have the skills to do something like that but, just not the tools .

I hope my next home gives me the room I need to do a project like this one....

Very nice

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post #75 of 143 Old 07-05-2010, 12:49 PM
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Dennis, that really is quite spectacular. Thanks for having them take the time to chronicle this.

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post #76 of 143 Old 07-07-2010, 04:13 AM - Thread Starter
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Back to work following the holiday.
LL
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LL
LL
LL

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post #77 of 143 Old 07-08-2010, 02:02 AM - Thread Starter
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Doesn't look like a lot of progress, but that's a lot of tedious work on the walls.
LL
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post #78 of 143 Old 07-08-2010, 04:16 AM
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Wow, interesting - so much bass trapping, very cool if you've got the wall depth/I'm shocked at how much room you devote to it

General question about the treatments, is the opposing wall done in the same layout or is it different?

So thats linacoustic on the baffle wall as well?

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post #79 of 143 Old 07-08-2010, 04:39 PM - Thread Starter
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That is a linacoustic product on the baffle wall. It is a very thin layer. It's purpose is only to absorb any sound reflecting off the back of the AT screen to the baffle.

Let's say the opposite walls are similar..not necessarily identical; but, each room is different.

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post #80 of 143 Old 07-08-2010, 04:59 PM
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Quote:
Originally Posted by Dennis Erskine View Post

Let's say the opposite walls are similar..not necessarily identical; but, each room is different.

Understood, something like what Toole says about flutter etc, again not seen that done in other peoples rooms, they like it all symetrical

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post #81 of 143 Old 07-09-2010, 01:20 PM - Thread Starter
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Should be some more photos coming later (still working on site)
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post #82 of 143 Old 07-09-2010, 02:00 PM
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Love the ways its coming along, the stealth acoustic treatment panels are very interesting - varied depth based on needs identified by room measurements?
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post #83 of 143 Old 07-09-2010, 02:01 PM - Thread Starter
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Higher level mathematics.

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post #84 of 143 Old 07-09-2010, 03:48 PM
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Quote:
Originally Posted by Dennis Erskine View Post

Higher level mathematics.

I'm sure what I suggested was a gross oversimplification, and doing what you're doing would be well beyond my abilities... just trying to understand in general terms.
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post #85 of 143 Old 07-09-2010, 03:54 PM - Thread Starter
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Brad:

I don't mind taking your question offline ... I am being obtuse. In any case, there is too much fuzz in the room and the exact type of panel/diffusors going where will not be photographed (the famous midnight switcheroo) ... simply and illustration of what is being done in general.

Thanks
Dennis

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post #86 of 143 Old 07-09-2010, 03:58 PM
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Dennis is the use of the toroidal isolation transformer standard procedure in your builds or are there power concerns at this customer's house?
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post #87 of 143 Old 07-09-2010, 05:37 PM - Thread Starter
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On the higher performance rooms we use a 240v to 120v step down transformer and balanced power for lower line noise.

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post #88 of 143 Old 07-11-2010, 05:23 PM
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Quote:
Originally Posted by Dennis Erskine View Post

On the higher performance rooms we use a 240v to 120v step down transformer and balanced power for lower line noise.

Fantastic theater, as always, Dennis!

When using these, I assume, Equi=Tech balanced transformers do you recommend adding additional surge protection and/or UPS's for the equipment (any particular type)? In Colorado, the lightning capital of the U.S., especially?

If you're doing a whole-house A/V rack system (where everything is centrally located in a "new construction" build), do you use them to supply balanced power to all of the equipment throughout the house (TV's, satellite boxes, zoned a/v equipment, networking and control devices like for Control4, etc.), or do you usually use them for only the theater room equipment proper? Or is it one of those "it depends" kinds of scenarios?

Thanks!

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post #89 of 143 Old 07-12-2010, 03:26 AM - Thread Starter
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I have not used a step down transformer for a whole house distributed system. However, given adequate capacity, everything in the rack, the projector, and amps for the primary room will be on the 240V system. A lot of potential issues are eliminated this way. Typically, non-dedicated spaces will not have a low enough noise floor to see a benefit; however, other issues such as having the sources on the main equipment power and the family room display on a different leg with a different path to ground could develop...but that is rare (60hz "hum bars" for example). I do suggest a TVSS for the whole house, and that all low voltage items external to the house (phone lines, cable, gate intercoms, etc.) be brought into the house via a grounded surge supression system.

In general, the only items placed on battery backup systems would be things like the network switch in the rack, the control processor (Control4, Crestron, etc.) and perhaps a DVR. Where power is unreliable with frequent outages or brown outs, there are 10 and 15 kva battery back up units available from several sources. When used, I plan on 15 minutes of power for the system, upon power failure detection, the control processor goes into a 5 minute delay before shutting down the entire system. The primary purpose is to provide an orderly shutdown of digital equipment and a proper cooling cycle for the projector. We do see an inordinate amount of component failures in areas where power failures are relatively frequent and the home has a back up generator. Those can be really nasty from time to time.

The EquiTech in this installation has surge and GFCI in the box.

In the end, your best protection is a good homeowner's policy.

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post #90 of 143 Old 07-12-2010, 05:56 AM
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Quote:
Originally Posted by Dan Hitchman View Post

In Colorado, the lightning capital of the U.S., especially?
Thanks!

That didn't sound right, so a quick Google turned up http://www.lightningsafety.noaa.gov/..._to_Ground.pdf, scroll down to the second page, lightning flash density, and Colorado is 31st. The southeast is tops, with Florida being first
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