I agree with S7horton. That is, it will depend on the system, speaker / room interface and the type of music that you listen to. I would not consider it necessary unless you listened to a lot of bass heavy music at higher than average levels and / or your system / speakers were either lean sounding and / or not capable of extended bass at higher outputs. I wouldn't go this route unless you were completely satisfied with the idea that you were already obtaining optimum performance from what you've got. Adding more to a system simply makes it more complex and harder to set-up. I'm a firm believer in the "KISS" theory for the average enthusiast that isnt' technically inclined. For those that don't know what KISS means, it is an abbreviation for "Keep It Simple, Stupid" : ) Sean
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