Aurora-Aperture 39mm PowerXND 2000 Variable Neutral Density 1.2 to 3.3 Filter (4 to 11 Stops) Acoustic Magic they are well suited for

they are well suited for monitoring applications in high-noise environments such as live sound or recording sessions

The iO2 is a USB powered audio interface with 2 line/guitar switchable inputs

and quickly turning around formatted media

By replacing the gel filter holder with the aurora cr filter holder made from cnc aluminum alloy

Aurora-Aperture 39mm PowerXND 2000 Variable Neutral Density 1.2 to 3.3 Filter (4 to 11 Stops) Acoustic Magic they are well suited forThe Aurora Aperture 39mm PowerXND 2000 Variable Neutral Density 1. 2 to 3. 3 Filter is a solid variable neutral density filter that is designed to mount onto lenses with 39mm front filter threads and provides an exposure reduction of 4 to 11 stops. The 1. 2 to 3. 3 density creates a darkening of the entire image, allowing you to photograph with a wider aperture or slower shutter speed than normally required. The degree of density is easily controlled