I have a concern about the dac9 - sta9 combo I have. I notice with my old preamp that I had to turn it up quit a bit more to reach my usual levels with the Sta9 then my old amp. The old preamp had a 2 volt output so I got the dac9 which has a 4 volt output, same results. Then I invested in some xlr cables which should be an 8 volt output, same results. First to admit that I know nothing about electronics, why I am asking. I was listening to Super Tramp Crime of the Century Mobile Fidelity Gold, which I admit seems recorded at a lower lever. To reach 90 db's I had to turn up the dac9 to 85 on a scale of 99, my speakers are 89db efficient. Am I worrying about nothing, seems out of the norm to me. I admit the combination sounds awesome, best I have had, but just worried I am overdriving something. Thanks for any advice.