Monster Home Theatre Reference HTS 2600 MKII PowerCenter with Clean Power Stage 2 v.2.1 10 (Discontinued by Manufacturer) Monster Clean Power Stage 2 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. 5750 joule rating provides a high level of surge absorption. 10 surge-protected, color-coded AC outlets. level of surge absorption.