Reference System 4: Ken Stein

The system has also undergone extensive ISF calibration by our trained and certified ISF Senior Staff. Reference System 4 is the home of several Do-It-Yourself projects by handyman Ken Stein, which includes sound panels, speakers, and accessories. Audioholics plans to use Reference System 4 wisely and effectively in many of our loudspeaker and subwoofer reviews.

Main features include an Integra Research RDC-7 processor and DIY speaker system. The DIY sound panels make the room acoustics in reference system 4 ideal for audio reviews which include loudspeakers, processors, amplifiers and other assorted home theater products.