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Sweetwood 11.1 Theater destroy and rebuild - Page 27

post #781 of 840
Quote:
Originally Posted by premiertrussman View Post

So when are we having this AVS get together....
???

Quote:
Originally Posted by adammb View Post

Actually just did a big push this weekend to get some loose ends together. Hopefully I will be fully done within a month and then I will consider a meet.

Who's pickin me up??
post #782 of 840
Quote:
Originally Posted by Iusteve View Post

Who's pickin me up??

Youre sorta on my way.... If you aren't too cool to ride in a tan mini van!
post #783 of 840
Quote:
Originally Posted by premiertrussman View Post

Youre sorta on my way.... If you aren't too cool to ride in a tan mini van!

Tell me it either looks like this....



Or this........

post #784 of 840
Haha, a little more like the second one...cept without the Jesus part.
post #785 of 840
It must be pronounced "Hey-soos" because Jesus ("Gee-sus") would NEVER drive a Ford Windstar!!
post #786 of 840
Thread Starter 
As long as there is no sign on the sides that say "free candy" or "have you seen my puppy" we're good
post #787 of 840
Quote:
Originally Posted by adammb View Post

As long as there is no sign on the sides that say "free candy" or "have you seen my puppy" we're good

HAAAA!! HAHAHA! No i would never do that....although I did buy a megaphone that plays the ice creme truck theme.....
post #788 of 840
Hey Adam,
great build! I'm guessing that everything is now working well. What a marathon read I did... haha! I was wondering what your perceived improvements on all the room isolation work was like? What I'm wondering is how much sound was cut down in the rest of the house by going the extra lengths for DD, Clips, Channels, GG etc. I am planning my rebuild and would like your thoughts. Last night my brother and nephew came over and we were watching a movie in the basement which is on the opposite side of the house. He could here the movie playing at the front door!!! We were probably at -5 from reference level. Do you still here sound emanating in the house, or china rattling when the Big Danley hits?

Rod
post #789 of 840
Thread Starter 
With what I had to now it is a dramatic difference and I still have things I would prefer to do better like the doors. I would say it is over a 50% difference. It no longer shakes my windows upstairs and I can watch a movie at a -15 reference level and my wife can still go to sleep without being woke up. I rarely watch movies at above -10 reference. I am very pleased with the outcome.

Was it worth it? .............. Looking back and reflecting about how much money I spent I wish I would have just added onto the house. I probably would have spent 10-15k more and I would have a bigger house that would be worth about 20k+ more. I just couldnt commit to adding on and I under-estimated how much it was going to cost me to redo it. I did add alot more equipment as well too. I will say that I have never been in a nicer home theater and I will always see houses on the tv that say they have home theaters that cant hold a candle to mine or almost all theaters on this thread. I even prefer to watch movies at home that the theater due to sound and video quality alone. Let alone I dont have to worry about movie talkers. Last weekend my wife and I went to see MI4 and the guy behind us had to be translating the movie to his wife because is was talking the entire movie. And I dont mean whispering. Half whisper/Half talk.
post #790 of 840
Thread Starter 
Getting back into gear to finish up the loose ends. Finished almost all of the remaining paint needed this weekend. Only a few more things to do and then I'll be done. Let this be a warning to all that think they want to get their theater up and running before their done. It will extend your construction time dramatically. I am at about 2.5 years I believe in which it should have not taken over 6 months. I have been enjoying the theater though just unfinished. Time to wrap this puppy up. Wish me luck.

I need to get my Behringer EQ operating as I am bypassing it right now. This is for the Danley sub so any advice would be awesome. I had talked to someone in the past about some tips but have lost all my PMs.
post #791 of 840
Thread Starter 
Only two more spots to paint and finally the paint will be done. I got the rack exhaust fan all done and will post pics soon. I am still fighting this ground loop buzz or what I think is a ground loop buzz. I bought the plug adaptor that eliminates the ground and last time I tried it I swore I found that using it on one of my amps would eliminate it however I tried it again today and it didnt work. Leaving it on there is not the proper solution but I am at my wits end. Any other suggestions? I read somewhere that I could manually ground each unit together but I am unsure how to do that. I also bought an isolator for my cable line coming in but that did nothing.

Here is the entry door painted and you can see the vent at the top corner. This is the exhaust of the rack area. It sucks it from the bottom of the rack door and spits it out of this vent. I am hoping that this keeps it much cooler in the theater.


Here the rack is pulled out trying to eliminate the ground loop buzz with no success.


Here the rack is pushed back in


And here is the door closed. I think I am going to add a layer of tint to the door to reduce the lights reflecting in the theater.



I also got some info from Tony123 about setting up the Behringer Feedback destroyer customized to the Danley. I think I put the settings in correctly. I can tell you that IMAX does not hold a candle to watching movies at home audio wise.
post #792 of 840
Quote:
Originally Posted by adammb View Post

. I am still fighting this ground loop buzz or what I think is a ground loop buzz.

Looks good but, ouch....been there done that before...Not fun trying to find those out and a very annoying issue too...
post #793 of 840
Have you tried disconnecting sources until (hopefully) the ground loop goes away?
post #794 of 840
Thread Starter 
I tried unplugging all of my separate amps this weekend as I was sure it was one of those last time I tested and I still got the hum and none of the three took it away. I can try again this week but I have not been successful and was going to just use the ground eliminator on the one that was doing it but couldnt find it. All the efforts I took to make it as quiet as possible in the theater are only making the sound that much worse. At times it will even make a pulsing sound but it does not happen all the time.
post #795 of 840
Maybe a block diagram would help us understand your buzz/loop problem better.

Does the buzz come from one or all speakers?
post #796 of 840
Thread Starter 
I do notice that the buzz comes from all speakers but I mainly hear it from the center and side surrounds the most which are on separate amps.

What do you mean by a block diagram?
post #797 of 840
So that would seem to indicate it is coming from upstream of the amps.

Have you tried disconnecting the sources from the inputs of your pre/pro?

A block diagram would show the chain of components, where each component is a block, so we can see the signal flow.
post #798 of 840
Here's a good article on this subject:
http://www.audioholics.com/tweaks/co...m-hum-and-buzz
post #799 of 840
Thread Starter 
If I remember right and that means I am going to have to retest this all over again that if I unplugged my cable box HDMI it almost went away. That is why I bought the isolator for the coax line. In my research it did not mean that that source was the problem but that it did not work well together between another component. I am guessing that I need to do alot of testing again to determine some of these items again. Although for some reason I was thinking that I left the cable unplugged to the theater and only have it running to the switch to go to my living room. Argghhh. I HATE this. Thank you for your help so far and appreciate your time. I wish there was an easier method to find and remove this hum. I cant test more tonight but I will try for tomorrow.

As far as the block it goes

bluray player, dune streamer(2), xbox360
HDMI to
Receiver
HDMI to
Projector
PRE/PRO analog to
2 emotiva amps and behringer feedback destroyer(then to ep4000)
Speaker cables to all speakers from there

Is this what you mean?
post #800 of 840
Quote:
Originally Posted by adammb View Post

If I remember right and that means I am going to have to retest this all over again that if I unplugged my cable box HDMI it almost went away. That is why I bought the isolator for the coax line. In my research it did not mean that that source was the problem but that it did not work well together between another component. I am guessing that I need to do alot of testing again to determine some of these items again. Although for some reason I was thinking that I left the cable unplugged to the theater and only have it running to the switch to go to my living room. Argghhh. I HATE this. Thank you for your help so far and appreciate your time. I wish there was an easier method to find and remove this hum. I cant test more tonight but I will try for tomorrow.

As far as the block it goes

bluray player, dune streamer(2), xbox360
HDMI to
Receiver
HDMI to
Projector
PRE/PRO analog to
2 emotiva amps and behringer feedback destroyer(then to ep4000)
Speaker cables to all speakers from there

Is this what you mean?

My guess is sort of, but you'd want to show which connections on the devices went where, especially with regard to the speakers being fed by each respective amp.
post #801 of 840
Thread Starter 
Now that I am thinking about it I run the rear surrounds off the Denon receiver and I dont think any hum comes from them. That would lead me to think that it is the two Emotiva amps that are the problem however if I determine that how do I fix it? I remember having a conversation back and forth with Emotiva but with no resolve.
post #802 of 840
Quote:
Originally Posted by adammb View Post

I do notice that the buzz comes from all speakers but I mainly hear it from the center and side surrounds the most which are on separate amps.

What do you mean by a block diagram?

So I had this problem when I finished my theater and it drove me crazy. There was actually 2 distinct hums. I literally unplugged everything and started plugging them back in to see what I thought it was. There was one hum coming from all speakers, which was mostly due to the cable input. That was solved with a ground loop isolator. http://www.amazon.com/dp/B0017I3K9M/...60_cs_sce_dp_1

Then I was getting hum which seemed to only come from the front of the room, and mostly from my subs. Removing the "grounding screw" on the subs (As recommended by axiom) didn't remove the problem. I use XLR cables to my subs as well, which means I didn't need to make a special cable to test out if that was the problem. It didn't end up being the subwoofers at all! In the end, it was the projector's power plug that was doing it (The power plugged into my power conditioner through an in wall inlet/outlet extender) I also had a home theater PC hooked up at one time which also had a hum. In those cases, 3 prong->2 prog power plugs solved the issue. I know those plugs are bad in a lot of cases, but they worked. At one point in time I also plugged a computer monitor into one of my column outlet jacks to test my HTPC (my theater outlets are on one circuit, and the subs are plugged into that circuit) and as soon as I plugged in the monitor, a new hum was introduced!

A lot of times too things have to do with two different power sources (Amps, whatever) that are on two different circuits, and how they play nice. Any kind of COAX cable usually can be an easy culprit. Ultiamtely though, you have multiple amps, all of which connect sound through a common pre-amp. I fortunately only had one 7 channel amp, plus built-in amps in the subs. So disconnecting things one at a time until the hum vanished really helped me. (Removed each speaker one at a time, each interconnect cable, each power plug, all the way through the whole system and plugged it back in if the hum continued until I got it narrowed down. Remember to try and unplug ANY power cable plugged into any outlet which shares a circuit with any of your A/V gear or subs)
post #803 of 840
If it goes away when you unplug the HDMI from your cable box, then try disconnecting the coax cable input from the cable box. That is one of the most common sources of ground loops because code requires it to be grounded outside, and then it gets grounded again at your cable box.

I used to build TV broadcasting studios, so I share your pain with chasing ground loops.
post #804 of 840
Thread Starter 
As mentioned I have already installed the ground loop isolator and the exact one you linked above. I will start eliminating each item. If I remember correctly it was one of the amps. I was going to try the 3prong to 2 prong plug for a while although that is not the right solution and was hoping for a better one. I will try to problem solve all over again however I hope I dont have to remove every item. Good thing is that I have two separate circuits just for the rack so I should be able to unplug one entire circuit and if it continues I know it is on the other circuit. Then I can try to do an individual unplug of everything on the affected circuit. My main question that I hope someone can answer is what to do once I find a specific problem component other than eliminating the ground with my 3-2 prong adapter?
post #805 of 840
Thread Starter 
On top of wrapping things up in the theater I believe I am going to make some automatic masks for the side of the screen. I have looked into many methods and think I have come up with a cheap but ingenious method. I am going to try to use the electric rear glass shades from higher end cars. They wont be quite wide enough so I am going to have to try to figure that out but I think I will be able to get it all done for less than $500 although there will only be a open and close position unlike some other solutions but that is all I want.

post #806 of 840
See if you can figure out which SIGNAL connection is causing the loop. You should be disconnecting signal connections (not power connections) to locate the source of the loop. Then you can hopefully fix it by improving the connection, or by installing an isolator in the offending signal line.
post #807 of 840
Thread Starter 
You mean unplugging the HDMI sources that connect to my receiver. So that would be the Dune players, xbox, bluray player, and possibly the cable. I have already put an isolator on the coax coming from the cable line and that did nothing. What do I do after I find a source that when I unplug it the noise goes away. Each source is connected via HDMI. What would I do other than use a different HDMI?
post #808 of 840
Make sure the two components that the HDMI connects are plugged into the same circuit, so that they share a common ground.

I don't have any experience with HDMI ground loops myself, so I would be searching the Internet for other suggestions.
post #809 of 840
Thread Starter 
It is very probable that some of them do not share the same circuit. I will check on that as a solution. Maybe its as simple as using the same circuit. I know I separated some of them to another circuit so there wasnt too much on one circuit. If that is the problem I wonder how I can plug them in without overloading one of the circuits.
post #810 of 840
Be sure to test the grounding on the circuits. You could have a weak or open ground on one of the circuits.
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