Unfortunately, the product simply induced too much noise in my surrounds to be useful for me. But it did appear to work. This is Parasound's implementation of the Circle Surround product, meant to allow 5.1 preamps to have the 6th (centre rear) channel. According to one respondent, the Circle Surround Jr. product has this noise problem as well. Here is a response regarding CSE unit: "The S/N is limited by the specs. of the Analog Devices Circle Sound chip. We kept the remainder of the circuit as quiet as possible."