I'm a newbie to this site as of today so go easy on me. In 1975 I purchased a McIntosh 1900, rated at 55 watts, and JBL L100 speakers and happy to say they are both alive and well. I recently purched a 52" Sony LCD, Samsung 2500, and a Pioneer SC-09 reciever. Until I can afford new speakers I am using the JBL L100 for my mains and similar JBL for center and rear. As of now I don't have a SUB. My question to the group is that I have to crank up the volume on the Pioneer to get the JBLs to really make some noise. This was not the case with my McIntosh, at half volume the speakers were loud enough for my taste. I used the MCACC automated speaker setup to configure the system. I double and tripled checked the wiring/polarity/phase but still don't understand the problem. I don't want to damage these speakers and/or AVR as the speakers will be used in another part of the house when new speakers are purchased. Any ideas appreciated.