MultEQ is the basic room correction feature included in many Denon and Marantz Home Theater Receivers. There are many systems such as Anthem Room Correction (Anthem AV), AccuEQ (Onkyo), MCACC (Pioneer), DCAC (Sony), YPAO (Yamaha), Dirac Live (Select Brands), and Audyssey MultEQ (Denon/Marantz).Īudyssey has been licensing its MultEQ system to AVR makers since 2004, and currently provides its system to Denon and Marantz. Room correction is an important part of setting up a home theater system for best speaker performance.