basstraps placement home cinema

[Loupy31]

Hi All,
          Found this site a few days ago, some really helpful ideas on here.
I have a small HT room,  13 ft x 10 ft x 8 ft, Seating is about 3 ft from back wall ( long dimension), I have in the front corners 6 “ thick by 600 wide bass traps (floor to ceiling)
Also first reflection 75mm foam and same on the back wall,
Do I need basstraps on the rear corners and above the listening area?

Regards Peter

[Joel DuBay]

Your room will benefit from bass traps in all vertical corners. This is the most effective way to reduce low frequency resonances and and to help provide better opportunities to hear your bass notes in a more articulate way.

Adding absorption to the ceiling above the listening location will help curb reflections from this surface and help to widen your stereo imaging.

Here is some basic information on how to treat a critical listening area in the most efficient and effective manner:


7 Simple Rules for Broadband Acoustical Treatment

1. Lay out your system and furniture as symmetrically as possible, ensuring that the left-hand half of the room is as close to a mirror image as possible to the right-hand side. Your system should be oriented so that the side of the room that allows for the most symmetry possible (room shape, speaker/acoustic treatment placement, furniture) falls in front of the listener.

2. Try to place the listener at 40% of the room depth from the front wall. Example: If your room is 14’ (168”) deep, place your listening position 65” away from the front wall.

3. Avoid placing the listener or the speakers at the following locations:Against the wall, At 50% or 25% of the room depth away from the wall in front of the listener.

4. To smooth out low frequencies, install thick corner-mounted treatments. Add one pair of vertically stacked corner panels of 4” thickness in each of the four room corners. If vertical corners are not available, use any available horizontal corners (ceiling-wall or floor-wall). If you are unable to install eight 4” panels, use thicker 6” panels or NEST™ dual panel arrays in the corners you do have available.

5. Use broadband absorbers for all acoustic panels so that they work on all frequencies (i.e. lows, mids, highs) evenly.

6. Treat “early reflection points” with additional broadband absorbers of at least 4” thickness. A typical application will use eight reflection point panels – at least one pair of panels on the front wall, at least one panel each on the side and rear walls, and at least three panels on the ceiling. Keep all panels below ear level by using short 28”/70cm racks.

7. Stop and sample the results. Add more treatments only if the room creates too many echoes. In this case, add broadband panels incrementally, two or three at a time, as symmetrically and evenly spread on walls and ceiling as possible.