Sim audio moon i3

I recently bought a sim audio moon i3. I have never owned a piece of equipment of this quality but I am a bit perplexed and/or concerned that I may have a defective unit. The volume has a scale of 0-50. It is rated class a to 5 watts. It seems as though the amp does not perform well at low volume settings anywhere below 20 on the volume setting. The owners manual says the volume is attenuated to smaller incriments below 35 on the dial. The sound quality is superb but I feel like the first 20 of the volume lacks energy. The speakers I am running are either Focal Electra. 926 or Epos m5i. Both behave the same way in respect to volume. Is this typical for this integrated amplifier or do I have a potential problem? Thanks in advance for your input!