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yamahaSHO

Building my own center channel for La Scalas

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On 5/5/2020 at 9:54 PM, yamahaSHO said:

I am currently in a couple-day holding pattern as I wait for some proper-length HDMI cables.  Once those come in and are routed away from heat, I'll start putting it all back together and tiling up to the ceiling.  I am curious to see how it sounds and test... to see how I need to adjust the crossover.  

Run conduit if you need to do so so you can change to any new standards in the future. 

 

 

Did you use thinset to attach the Hardibacker to the drywall or just screws? 

 

 

 

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No need for conduit as now that there are holes and I've seen behind the drywall, I can pull anything through. 

 

Yes, I used thinset behind the Hardibacker. 

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I got burnt out for awhile, but I started working on it this week. Hoping to have the tile all laid tomorrow.  Wife will be happy... 

 

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Got the tile done and the speaker put together...  So far, it sounds great.  I will run some sweeps tomorrow and see where I am at with the crossover.  As much as I like the look of the speakers, I will definitely have a grill in place, using the 70th Anniversary fabric.  I like the idea of it not being noticeable.  

 

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I tried to hire out the tiling, but the guy did not impress, so I had him take it down and I ended up doing it myself. I have a welder buddy, who'd done a lot of work for me in the automotive side, that will do a surround around the fireplace for me. 

 

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I'm really digging this setup!  Yes, I'd like the mantel a little lower as well as the TV, but this is what I was working with...  And I don't have additional speakers and wire anywhere.  

 

I haven't run a sweep with REW yet, but I did run Audyssey on my Marantz receiver and there were huge corrections in getting a flat sound.  I think it may have had less correction than the La Scalas did.  

 

 

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I got all my stuff out to run REW, which I hadn't used in almost 10 years (still re-figuring it out) and ran a test.  I am using a Radio Shack 33-4050 SPL meter, which I originally purchased when I built my sub.  While re-learning the process, I did see that it is accepted that the Radio Shack meter does not do well above 3k hz.  Oddly enough, that's where I have the most discrepancy.  I may look at getting a mic to use...  Unless someone near Denver has one to rent/borrow, as I probably will only use it this on time.  :)

 

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I picked up a miniDSP UMIK-1 to do some more testing before I do anything to the crossover.  I also plan to take measurements in different spots as I later realized my tweeter might have read hot because of where I had the mic.  

 

I also finished off my surround sound by putting some in-wall speakers in to keep clutter down.  I was originally going to use my Klipsch RS-52's that I saved from my theater, but getting wire through that specific wall was going to be a problem, and I liked the idea of not having stuff hanging off walls.  

Whether I put the old speakers on the wall or these in-walls, the height was going to be at least 9 ft off the ground due to the 8 ft patio door.  So far, these seem to do well.  I have aimed the tweeter down as well.  The attic above was very cramped...  Not my favorite job. 


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Took some new measurements... I knew I might have been too close with the last one showing the tweeter being hot.  I always thought it sounds like it may be attenuated too much and it appears I was right.  

 

1-meter away. 

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Listening position. 

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I may redesign the crossover a little bit as it's got a 2k hz hump. 

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Thanks for sharing your project. Really like your attention to detail and the creativity with the mantel/speaker build. Do you have any updates? How do the surround/rear speakers sound with the La Scala's? Are you running any atmos speakers?

 

 

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I actually have a new crossover to build that I had some help designing by one of the experts here.  It'll be a very extreme slope at 1,200hz on the tweeter. I sat down to build it a couple weeks ago and realized one of the coils PE sent was incorrect.  They have sent me a new one, so I am going to sit down this weekend and build it and swap it in to run sweeps. 

 

The rears seem to integrate pretty well.  I haven't even run the Audyssey with the rears yet... Just level matched them by ear for now.  For the most part, I am extremely happy with the setup not having a dedicated theater again.

 

Once I am happy with the crossover, I'll be pulling the drivers to sand the baffle and Duratex coat it. I like the black better and it will help with the grille. 

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Finally got a chance to put together the new crossover...  It's crazy how you set something aside and forget for months.  It's not as pretty as I'd like, but it won't matter as it'll be in a box.  :)  I will test it out and take sweeps tomorrow.  Hopefully this is where I want it as I'm not really keen to keep messing with it. 

 

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Quick sweep after putting in the new crossover.  It sounds better!  I may try reversing the polarity of the tweeter and seeing how it does.

 

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Got the grille wrapped! I like the cleaner look if not seeing the drivers. 

 

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