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If your speaker is one quarter wavelength from the wall for a certain frequency, wave cancellation occurs at that frequency. This causes a horrid dip, notch or null in the frequency response.
How do I get rid of bass null?
The usual solutions are to move the MLP or add a sub to help fill in the null. Bass traps (absorbers) become less effective as frequency drops so you'd need a lot of them, probably more than practical, or a few very, very thick ones (ditto).
Do bass traps help nulls?
If the null is modal then the Bass Traps should help (only if they are thick enough to actually work down to 70 Hz, 170mm does seem to fit the bill if they are straddling a corner). Further you'll want to make sure they're actually in the correct place to affect the mode you're aiming for.
What is a room null?
The Null is the source of the central mystery in The Room games. It is unknown exactly what The Null is, but it is said to be 'Everything, and nothing. ' "Null" may be considered a catch-all term to simultaneously refer to an element, a form of matter, a location, and an entity (or type of entity).
How do I know if my subwoofer is out of phase?
If the sub and main speakers were in phase, he'd hear a single thump when he connected the battery to the wires leading to the sub's terminals. If they were out of phase, he'd hear a double thump. That's with passive subwoofers, though.
What is speaker boundary interference?
SBIR (Speaker Boundary Interference Response) – This is a term to describe how the proximity of a speaker to a hard boundary (wall/ceiling/floor) will change the response, especially in the low end. This is something that not a lot of people understand nor consider when planning a room.
How is speaker placement calculated?
Determining the Placement of Your Speakers Place your speaker 1/3rd of the distance from your front wall, and your seat 1/3rd the distance from the rear wall. For example, if your room measures 15ft from wall to wall, place your seat 5 ft from the rear wall and your speaker 5 ft from the front wall.
Can you have too much bass trapping?
“You can't have too many bass traps! “ But you've probably also heard stories off people putting way too much absorption in their room and it ending up sounding over-damped, or even “dead“.
Do bass traps have to be floor to ceiling?
Bass traps don't need to be floor to ceiling. The best places are wall-wall-ceiling and wall-wall-floor corners because that's where the more acoustic pressure accumulates. While floor-to-ceiling bass traps provide ideal absorption, they're not always viable if you need space on the floor.