The Big Bay Home Theatre - Page 18 - AVS | Home Theater Discussions And Reviews
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post #511 of 528 Old 01-05-2015, 10:51 PM
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Luckily for me, these are already in the basement. My thought was to build them on a dolly so I could wheel them into the theater.. but I'm not sure these will be up to the task with how heavy the subs are. I don't think they'll roll on the carpet. I'll need to get a friend over to help move them into position
I've used a very low profile sled on casters I built to move stuff like that on hard surfaces and coasters I bought at HD with the slick plastic bottoms for carpet. Seems crazy but with those coasters you can slide several hundred pound pieces of furniture with ease on carpet and solo. Would work well with something heavy like a sub.
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post #512 of 528 Old 01-20-2015, 05:37 AM - Thread Starter
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And let there be sound...

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The Big Bay Home Theater Build Thread
My personal theater build on Kempenfelt Bay, Barrie Ontario Canada
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post #513 of 528 Old 01-20-2015, 06:41 AM
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And let there be sound...

Gorgeous!!

Agree with BIG's earlier post, it's almost a crime to hide that craftsmanship with an AT screen.

My in progress build thread: Hidden in Bethesda
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post #514 of 528 Old 01-20-2015, 08:09 AM
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Looking good!

toe those speakers in a bit.

https://www.dropbox.com/s/19ypjyrtdw...akers.pdf?dl=0

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"Too much is almost enough. Anything in life worth doing is worth overdoing. Moderation is for cowards."
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post #515 of 528 Old 01-20-2015, 10:39 AM
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Sexy - bet it sounds great too - I miss seeing my speakers too, I wonder if they're still there?
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post #516 of 528 Old 01-20-2015, 02:01 PM
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OMG... ::: DROOOOOOOOOOOLL::: there should be a NSFW tag on porn like this!
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post #517 of 528 Old 01-20-2015, 05:31 PM
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Wow - love this build. Really nice job!
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post #518 of 528 Old 01-20-2015, 08:48 PM
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Quote:
Originally Posted by memmo View Post
And let there be sound...

Looks great! How do those speakers and massive subs sound?
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post #519 of 528 Old 01-21-2015, 11:39 AM - Thread Starter
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Looks great! How do those speakers and massive subs sound?
I'm troubleshooting some noise issues I'm having... narrowed it down to either the processor or the power amp. When I take both out of the equation and power the LCRs using a cheapie Denon AVR, the noise goes away.

Tonight, I'm going haul down a pair of mono blocks I have in a closet upstairs and try powering the L+R from it. Presumably, if the noise is still there, its a processor thing, if its gone, then something to do with the amp.

Not fun stuff, but I'll get to the bottom of it hah

The Big Bay Home Theater Build Thread
My personal theater build on Kempenfelt Bay, Barrie Ontario Canada
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post #520 of 528 Old 01-21-2015, 01:55 PM
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There have been known issues with some power amps and high efficiency speakers. I know TMcg had this problem. Monoblocks may not help prove anything if they are pretty high powered. Your amp is 200 watts per channel right? The fact that you put a cheap Denon receiver in the mix, with little power more than likely, tells me it could possibly be too much wattage for your LCR's. Do you have any speakers that are below 90 dB efficient? If you have some in another room in the house try those out in your theater. Also, if you switch around one of the surround inputs with the lcr inputs, do you still get the noise? I know those Klipsch surrounds are very efficient also but it may be worth a try. I would find it very odd for a power amp or processor to be creating noise problems with the lcr channels only. The amp may have 1 bad channel but I doubt 3 bad channels. The same goes for the processor in that having 3 bad channels is not likely.
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post #521 of 528 Old 01-21-2015, 03:35 PM - Thread Starter
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Originally Posted by JVoth View Post
There have been known issues with some power amps and high efficiency speakers. I know TMcg had this problem. Monoblocks may not help prove anything if they are pretty high powered. Your amp is 200 watts per channel right? The fact that you put a cheap Denon receiver in the mix, with little power more than likely, tells me it could possibly be too much wattage for your LCR's. Do you have any speakers that are below 90 dB efficient? If you have some in another room in the house try those out in your theater. Also, if you switch around one of the surround inputs with the lcr inputs, do you still get the noise? I know those Klipsch surrounds are very efficient also but it may be worth a try. I would find it very odd for a power amp or processor to be creating noise problems with the lcr channels only. The amp may have 1 bad channel but I doubt 3 bad channels. The same goes for the processor in that having 3 bad channels is not likely.
The noise is in all of the channels (including the surrounds)... I can bring some small bookshelf speakers down to test the L + R. The Klipsch are 93db.. the bookshelfs are probably 88db so a better test.

The mono blocks are 150w channel instead of 200.

If it is infact just too much wattage, I'll just sell both and get one of the new Marantz receivers and call it a day.

The Big Bay Home Theater Build Thread
My personal theater build on Kempenfelt Bay, Barrie Ontario Canada
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post #522 of 528 Old 01-21-2015, 04:20 PM - Thread Starter
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I tried the bookshelf speakers in the mix and just like I suspected, the noise is MUCH less apparent. I had the pre-amp's volume set to 70 (vs the 60 I used with the Fusion's) and even though I could still hear the artifacts when I put my ear close to the speakers, from listening position, its virtual inaudible.

One thing that is really bothering me however is I think the amp is turning off the outputs (auto muting or something) when there is no signal. It makes it very hard to test. Essentially when nothing is being played, all I get is normal "hiss" which is inaudible until you put your ear next to the tweeter. When music starts, you hear the annoying high pitch noise (almost a ringing, not a hum or buzz -- very hard to describe). The amp has 3 settings "on", "music" and "12v". Its set to "ON" yet when listening to a cd for instance, in between tracks, it goes silent and sometimes I loose the first 2-3 seconds of the track before it turns on.

Frustrating problem. My big thing is. I dunno if its a problem with the processor, a problem with the amp, or if its just the nature of a not so quiet amp design with efficient speakers. If I thought the latter was the case, I'd just list and sell both items and get a new Marantz receiver. As is, I'd feel bad about selling something that I'm not 100% confident in.

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post #523 of 528 Old 01-25-2015, 03:58 PM - Thread Starter
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Had my mother over today and she managed to get the remaining red fabric panels done.

The one in the rear with the notch for the projector box was particularly challenging. Getting everything to fit just right proved tricky. It's pretty darn good now (its essentially wedged in).

Behind the panels are 4" of OC 705 equivalent, sitting 1" off the wall. I also used some poly vapour barrier over top of the insulation (per Bryan Pape's recommendation to reduce HF loss in the rear).

Also brought the seats in -- I got both rows used -- separately -- both the same Berkline design, slightly different finishing. All power recline. At about $300 a pop, It worked out great for now. It doesn't look like it in the the pic, but there is about 5-6 inches behind the rear row. A compromise acoustically for sure, but one I knew I about and was happy to make from day one. It's not terribly important that those seats perform well given how little use they'll see.

Now that they're in, I verified how tall I want to make the "booster" riser for the rear seats. Another 4 inches or so will be perfect

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The Big Bay Home Theater Build Thread
My personal theater build on Kempenfelt Bay, Barrie Ontario Canada

Last edited by memmo; 01-25-2015 at 04:02 PM.
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post #524 of 528 Old 01-25-2015, 06:43 PM
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Looking great, you lucked up on the seats!
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post #525 of 528 Old 01-26-2015, 06:09 PM - Thread Starter
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Update on my noise issue...

Tried a bunch of things and no luck. Then I swapped out the balanced XLR interconnects for some unbalanced RCAs. Noise gone. Anyone have any potential explanations?

The Big Bay Home Theater Build Thread
My personal theater build on Kempenfelt Bay, Barrie Ontario Canada
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post #526 of 528 Old Yesterday, 10:29 AM
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Loose ground in a balanced cable or chassis connector? We all like to think balanced eliminates noise. But it doesn't eliminate ground loops, I guess. This is a very interesting one.
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post #527 of 528 Unread Today, 02:08 PM - Thread Starter
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Loose ground in a balanced cable or chassis connector? We all like to think balanced eliminates noise. But it doesn't eliminate ground loops, I guess. This is a very interesting one.
Swapped XLR cables and it made no difference. I guess I'll stick with RCAs until I upgrade

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post #528 of 528 Unread Today, 04:07 PM
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So, no more noise with the 7030/Sherbourn Amp and speakers if you go unbalanced? To be honest, the balanced connections vs unbalanced never made a difference in sound as far as I could tell. Either way, it shouldn't make a hissing noise. Good luck finding an answer for that! Glad it finally worked out. Time for measurements!
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