Monster Home Theatre Reference HTS 3600 MKII PowerCenter with Clean Power Stage 3 v.2.1 Circuitry Dimensions: 3.88" H x 17.13" W x 12.88" D; weight: 17.45 lbs. Monster Clean Power; Stage 3 v.2.1 circuitry filter dramatically reduces electronic noise. T2: automatic disconnect/reconnect protection circuitry. Tri-Mode: power protection circuitry with audible alarm and auto disconnect. 6500 Joule rating provides a high level of surge absorption.