I made Skyline Diffusors for my Living Room - YouTube
Skyline Diffuses by Perfect Acoustic: 60x60x15cm, 12kg
RPG Skyline - Acoustic Products
Skyline Diffusers Pro And Cons – Acoustic Fields
Amazon.com: Acepunch New Quadratic Skyline Acoustic Wooden Diffuser for Studio and Home Recording for Noise Insulation Soundproofing Panel 23.6" x 23.6" x 3.9" inches or 60 x 60 x 10cm AP1204 :
2D Skyline Diffuser - 20" x 20" - us-acoustics.com
Studio Special Skyline Sound Diffuser Acoustic Parametric Panel 1.1khz-9khz - Etsy