Check the listing for details. Roland E-660 Digital Parametric Equalizer, Eq, Vintage Rack. Listed at 329.99 USD. The Roland E-660 Digital Parametric Equalizer is a vintage rack unit that has become a staple in the world of professional audio equipment. This unit was manufactured in Japan and is known for its precise and powerful equalization capabilities. Ideal for use in recording studios and live sound applications, the E-660 is designed to deliver exceptional sound quality with minimal distortion. Its parametric equalization allows for precise adjustments to be made to the frequency response of audio signals, making it an essential tool for anyone working with audio. If you're in the market for a vintage equalizer that delivers exceptional sound quality, the Roland E-660 is a great choice. This unit is in Good Condition (1) problem digital optical out node is broken see photos did not test optical output but believe it will not impede performance not sure, when power is on can detect light in the optical output. This unit comes with power cord and original owners manual. "Fast Shipping"