Well, its down to the short strokes for tuning my system. I have a pair of REL Gibraltar G1s sitting on my hardwood floors (I used to have 2x3h six pack) which are suspended via floor joists above my basement.
I have shored up the listening room with two 6"x6"x12' beams with a central jack post and 4x4 wood posts on either end of each beam. The beams sit perpendicular (across) the existing engineered floor joists.
I have also mass loaded each of the sub cabinets with `120lb of cold steel bars.
The subs are dialed in well, but the entire house shakes when playing the system with more than 90db peaks and when the recording has sub 30hz information in it.
Most of the vibration is in the structure of the house itself and is not coming from the subwoofer or its enclosure..
The existing 'feet' on the RELs are a weak point in the design IMO, as they are essentially two~2hx4wx16"l strips of wood running from the front to back of each sub, making the contact between each sub and the floor (two)x4wx16l.
I feel that the main problem is the subwoofers are too tightly coupled to the hardwood floor and therefore the entire house.
I'm thinking of options to further decouple the subs from the house:
1) A heavy 1.5"-2.5" thick slab of a composition to be determined under the existing subwoofer feet. Some Material I've considered: Marine Plywood; MDF, Granite, Slate, or a custom Composite
These slabs would be threaded with 5 holes (4 corners and one center hole).
5 threaded metal spikes per slab
5 metal isolation disks for the spikes which would sit on the hardwood floors.
I also thought that I might consider connecting the slabs to the existing subwoofer feet with screws or other methods.
Any thoughts or suggestions on slab materials or methods to guide me here would be appreciated.
I have shored up the listening room with two 6"x6"x12' beams with a central jack post and 4x4 wood posts on either end of each beam. The beams sit perpendicular (across) the existing engineered floor joists.
I have also mass loaded each of the sub cabinets with `120lb of cold steel bars.
The subs are dialed in well, but the entire house shakes when playing the system with more than 90db peaks and when the recording has sub 30hz information in it.
Most of the vibration is in the structure of the house itself and is not coming from the subwoofer or its enclosure..
The existing 'feet' on the RELs are a weak point in the design IMO, as they are essentially two~2hx4wx16"l strips of wood running from the front to back of each sub, making the contact between each sub and the floor (two)x4wx16l.
I feel that the main problem is the subwoofers are too tightly coupled to the hardwood floor and therefore the entire house.
I'm thinking of options to further decouple the subs from the house:
1) A heavy 1.5"-2.5" thick slab of a composition to be determined under the existing subwoofer feet. Some Material I've considered: Marine Plywood; MDF, Granite, Slate, or a custom Composite
These slabs would be threaded with 5 holes (4 corners and one center hole).
5 threaded metal spikes per slab
5 metal isolation disks for the spikes which would sit on the hardwood floors.
I also thought that I might consider connecting the slabs to the existing subwoofer feet with screws or other methods.
Any thoughts or suggestions on slab materials or methods to guide me here would be appreciated.