acoustics

So, I have a fairly challenging set up with regards to speakers/acoustics etc and looking to change things around - and upgrade speakers. I am a total noob with room acoustics so advice would be greatly appreciated. Space is a "double living room" - 7m x 3m; The hi-fi and sofa are in one half...

I've got an ex-dem Leema Libra DAC connected to a Hydra II Anniversary Edition power amp [on loan]. The DAC turns the volume down by itself within ten minutes of switching on. However, the displayed volume level does not change. Does anyone know what is going wrong? It's connected to the amp via...