You have quite a conglomeration of components and cables going on there. The fact that you are unhappy with the sound is a perfect example of buying recommended components without knowing how they will work together. This is why, when in doubt, it is better to stay with like brands of various components since they are designed to work together. Your SFL-1 is known to be on the forward/thin side and I have no idea how it mates with the Classe, but the Classe amps I have heard after the DR series sounded less then full bodied to me.
For starters I recommend trimming your system down to locate the problem. Take the subwoofer and DAC out of the system and just work with the basic system. Try a warmer tube in your preamp and experiment with different cables before changing components.
Without knowing a single thing about the room or how the system is set up in the room a recommendation for room treatment is absolutely rediculous.
For starters I recommend trimming your system down to locate the problem. Take the subwoofer and DAC out of the system and just work with the basic system. Try a warmer tube in your preamp and experiment with different cables before changing components.
Without knowing a single thing about the room or how the system is set up in the room a recommendation for room treatment is absolutely rediculous.