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 Usual question: Should I combine the R1s with other acoustic treatment ? No, the Roundffusor1 is designed to be a complete acoustical solution, offering mid and high frequency diffusion and adaptable absorption for low and very low frequencies.
Absorbent materials will limit or eliminate the effects of diffusion. also lowering the intelligibility. The absorption is reducing the sound energy in the mid and high frequency zone, there, in the ''heart'' of music. Half efficient diffusers or simple geometrical diffusers also produces absorption or just some near field reflections. Foams or porous materials covered with fabrics or perforated panels are mainly used to reduce the echoes or RT60 but this is not quality musical acoustics. This is a bad comeback to Low Fidelity, even for speech or singing. Don't confuse fancy architectural appearance & high economic profits, with efficient and affordable real musical / room acoustics.
Using absorption of such type, along with the reduced tails of echoes, someone is loosing the beauty of the music - the mid and high frequencies. Remember, in concert halls, people bodies are absorptive at the same mid frequencies. Transparency in sound, to be recorded or reproduced is incompatible with absorption. If you understand all this and don't want to pay tons of expensive materials covering all walls and the ceiling in any kind of rooms, try to stay away from the absorption's troubles and use the R1. Passive and inertial thinking are not music's best friends. R1 : The acoustical device solving practically all problems, demanding minimum wall surface coverings with maximum results, considered art deco to suit your own taste
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