Low End Treatment

When absorbtion and diffusion are applied and the reverberation times are up to specs for the application, it’s time to address the low end. Absorbtion and diffusion apply to reflections, low end points to standing waves. That’s usually a bit more of a challenge.  

Standing waves have to do with the relationship between dimensions and frequencies. When you play a frequency (tone) in a room, in particular the primary wave that fits between two walls, you can hear the volume increasing and decreasing when walking through the room. Low frequencies should ideally be treated at 1/4th of the wavelength, at the highest amplitude where the frequency is the loudest.

But having said that, a quarter wavelength also means a quarter of the room so in a room of four meters, basstraps should be at one meter from the wall. Not very practical, but fortunately there are alternatives to treat the low end without major concessions to the use of the room.

The SANDBOX LOWRIDER basstrap is a tuneable membrane-absorber for low frequencies that can be placed in a corner of against a wall, depending on where standing waves occur. LOWRIDER is available in large formats, 80-100cm wide and 2 meters tall is no exception. And of course they are available in many colours.

Since we won’t start building your basstraps until we made a plan together, we have no stock to speak of and therefore hardly any stocking costs. Our workshop is located in The Netherlands, so if you’re in the same country you won’t need to pay for shipping from overseas or out of other far ends of the world.

Also, there’s no trade channel, you’re buying directly from the makers. That way we can keep pricing friendly. In many cases, our solutions are more affordable than manufactured alternatives. May not be what you would expect for custombuilt acoustics, but let us surprise you!

No need to worry about the sizes of some of the elements. We’d be happy to come over and install your acoustic treatment, so we’ll also take care of logistics.

Standing waves can occur between two opposite walls or where walls meet in corners. To be more precise, you can think of corners between walls, wall and ceiling or any combination.

These elements e.g. were designed for a room in the Wisseloord Studios that is used by one of the leading singers we have. This particular room is in a corner of the building with a lot of glass, and also the door was placed right next to a corner. Thus leaving little room to place cornertraps. The large walltraps you see here are designed to fit in the corner directly behind the door. At the backwall three smaller traps were built to go on the backwall above the windows.