Does Storage Damage Equipmnt?

greetings & kind regards

may i please inquire does storage of equipment in commercial / public storage facilities harm equipment . permit me to elaborate . upon playing my system in a prior residence i always was stunned by the quality of reproduction so much so i would almost speak so out loud . however prior to moving to my new current residence the system was stored in such storage facility for several summer months . upon installing system in said new residence i no longer shout out loud "stunning" after each play as i almost did prior . so i kindly inquire has my system been damaged by such storage ?

thank you kindly

cheers