Sid1908

HI i have recently built a 5.1.2 Home theater . i had few question on calibrating my speakers .. What is the best decible level should i have for my speakers . i tuned each speakers to reach 75 db using a spl meter but the volume is very low ... i almost have to turn it up to -10 to -5 to hear .. Can i have my speakers to set to 80 db ? Also i have a denon x4500H avr where relative volume scale is +18 to -79 ..Please help me with your valuable inputs