Manual operation is standard on all Soundguard models. Electric operation is optional on all models. We recommend electric operation for large openings.
STC Model Hanging Weight Stack Width Extended Width NRC* Rating Max Height Track 10' Selector >10' 0 Starline X8 2.2 8-1/2" 5" .70 20' #21 #41 0 Starline X12 2.2 12-1/2" 7-1/4" .70 20' #41 #41
	*Based on use of carpet covering which may affect STC ratings. Test results were achieved independently.