If you are using a USB cable to link the Benchmark from your computer the USB cable is the problem. Spend $29 and get a one or two meter run of Belden Gold series USB cable. This will solve your problem. The Belden Gold series is one of the few USB cables that is correctly designed and implimented. I have tried the Kimber (better but still terrible sounding) and the Axis (better but over priced). The belden will do the job until some high priced alternative comes along.
Another option is to replace the standard power cord with the $99 Shunyata Venom cord. This also tame the Benchmark's brightness.
Another option is to replace the standard power cord with the $99 Shunyata Venom cord. This also tame the Benchmark's brightness.