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Thread: JBL Synthesis - Room Design and Treatment

  1. #61
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    Photo Update

    This photo shows just inside the entry door to the bottom level. Due to the load bearing wall issue, this will no longer be part of the HT.

    So now it serves as a staging area for the activities up the stairs. OOHH, it's a jammed mess!

    The box on the floor is 500' of 14/4 oxygen-free, 105 strand per conductor speaker wire. "Audiophile Grade" of course, and RoSH compliant.

    Eventually this lowest level will return as the music/fitness room.
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  2. #62
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    Turning right toward the stairs takes us in the direction of the now reduced-sized HT. With the latest plans it will be 2704 cu. ft.

    In the second, slightly higher shot, A PT800 still languishes on the wall. The particle board will be the floor for the riser in the back of the room.
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  3. #63
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    Fascinating picture Dome plenty of topic to talk about. What is that box on the floor with tube sticking out it? Is it one of those syrup things for soda pop machine?

    Do you use the JBL PT800 for centre back surrounds?

  4. #64
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    Just to the left of the stairs is the area that will be carved out of the music/fitness room to make way for the Synthesis® equipment closet. A couple pieces of metal conduit are ready to be pressed into service to shield the cable runs to the front and back.
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  5. #65
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    Going up the stairs and looking back, we see the big pile of Synthesis® equipment, minus the amps, which are stacked in another part of the room. Again, adjacent to the stairs (this time to the right) is the area where the equipment closet will be built.

    The railing comes out tomorrow and the framing begins.
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  6. #66
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    Next to the soon-to-be-built closet is the wall that couldn't be removed. There's a nice patch over the discovery hole now. The stepped area in front is actually drywall over the foundation.

    A continuous row of brown acoustical panels will be installed just above the level of the highest step. The 24"x48"x2" panels will run lengthwise the entire length of the wall. Above the panels the walls will be draped in black crushed velvet. Below the panels, the Swiss Coffee color will remain, at least until we see how it all comes together.

    There will be extreme low-level lighting at the receptacles.
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  7. #67
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    The ceiling is in four quadrants, and the front two are painted a dark, dark brown. also, the plenums and beams are painted this color.

    In actuality, the side of the visible beam will be covered with brown, angled acoustical panels, and the undersid of the plenum will have black acoustical panels on it out to 96".
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  8. #68
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    In the front, where the proscenium will be, the white ledge and supporting drywall box will be gone. The wall will be virtually covered with black acoustical panels.

    Above the screen, there will be black, angled panels, and the white screen case will be covered in black fabric. The front corners will have black, angled acoustical panels to keep the corners from accumulating waves.

    At the junction of the walls and the floor, there will be 24"x48"x4" black bass traps.
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  9. #69
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    For the eternally curious, here's the framing lumber for the equipment closet and the floor riser.

    All along the back wall there will be a continuous, horizontal run of 24"x48"x2" black, acoustical panels at the same height as the other walls. Above that, the wall will be covered in black crushed velvet.
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  10. #70
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    Finally, back down in the music/fitness room, the source equipment and the Synthesis® amps are evident.
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  11. #71
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    The PT800s will come out. They will be replaced by the in-wall S4Ai units/
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  12. #72
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    Shipped!

    The room treatments are completed and are being shipped. This is actually quite exciting! They'll come by freight; it's too much for UPS or FedEx.

    This will be quite an experience, as I've only done half-assed room treatments before, and this will be all the way. It wasn't cheap, but I expect big gains.

    I decided to go with acoustical panels instead of foam absorbers and diffusers. Every top notch professional studio I've visited has gone the acoustical panel route or some variation thereof.

    I should get them this week.

    I hope the black crushed velvet gets here first, as I can't put the panels up until the walls are done.
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  13. #73
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    Progress

    The closet is coming together for the equipment. It's a lot more work than expected. Removing the railing and stringers was hard due to lots of carpenter glue and long metal screws. Then a platform had to be built and a wall framed in.

    The space beneath the platform will become a storage locker in the music/fitness room.
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  14. #74
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    From the back side, here's the framed wall with the opening for the equipment racks. The racks are temporarily placed to check clearance.

    Once I locate the proper wall cavity on the far wall, we'll frame in the area above the opening to accommodate an S4Ai.

    The amps will be to the left (from the back) and other stuff will be to the right.

    We spent the better part of three hours working a 10' steel conduit through the wall on the left to the open space under the house. It will be used to guide the three speaker cables for the front; that's 12 conductors total. I think we'll run one more cable for "just in case" situations, like adding a second SAM2LF to the center channel down the road or perhaps another sub.

    You can also see the 6" riser on the floor in the back of the room for the back row of chairs.
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  15. #75
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    From the HT side and standing on the riser, here's a look at the front of the equipment closet.

    I feel so much taller.
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