Is it me or does the HU play at a low volume. I need to turn the knob to around Vol. 30-35 for the 10w7 sub and Focal K2Ps to even sound decent... Beyond 35, the front speakers begin to squeel... Any suggestions?

i only notice that after I installed my 4 channel amp that the vol seemed low but i can turn mines up to 40 and no distortion at all. I also have the SLA set at +4 too