How do i make my speakers louder without having to raise the volume so high?

I have a yamaha av receiver rxv663. Here's da link http://reviews.cnet.com/av-receivers/yamaha-rx-v663/4505-6466_7-32869451.html. I have onkyo speakers onkyo sks ht240. Here's the link http://reviews.cnet.com/surround-speaker-systems/onkyo-sks-ht240/4505-7868_7-30910224.html. I have an hdtv. Pioneer kuro elite pro 101 fd.here's the link. http://www.pioneerelectronics.com/PUSA/Products/HomeEntertainment/PlasmaTVs+Monitors/EliteMonitors/ci.PRO-101FD.Kuro. I have also have a ps3 hdmi wires and everything is running through the receiver. The cable feed to the tv is the only analog cuz I dnt have an hd cable box. So here's the question. Can u tell Me how I can make my speakers louder without having to raise the volume so high when I'm playing my ps3 games. Is my speakers or receiver not strong enough, is it the ps3 audio settings or my av receiver. Please help me correct this issue. I need to kno what todo step by step in all scenerios