Hoping someone may be able to help out, or point me in the right direction.
I'm running a Onkyo TX_NR609 driving a Mission 5.1 setup (M35 fronts, M3C1 Centre and M30 rears)
This afternoon I had some music playing from a AC Ryan playon hd 3d media player to the receiver and had to have the volume reading as 46-50 for there to be any real loudness to the music. The track being played was a mp3 file at 256 kbps.
There is a HDMI connection between the media player and the receiver.
A while ago when kids and wife were out I used the adyssey config mic to setup the speakers and speaker distances etc.
To me, it seems the volume had to be quiet load (on the dial) for there to be any real loudness coming out of the speakers.
Would running a optical cable between the media player and receiver help improve things, or have I just got a bunch of lemons?
Any (useful) suggestions appreciated.
Speakers specs below

Thanks.