Looking for some suggestion on the best option to integrate subwoofer to my 2 bookshelf setup. I use audiogd nfb 1.32 as a DAC and a gennari RV160 amplifier driving a Dynaudio Audience 42. I have a spare sub that I want to add in to add a little more kick to the low end. I've tried using my sub speaker level input so the sub is in between the amp and speaker and set the crossover at 80Hz but the sound is nowhere good as the speaker running by it's own. So I see my only option is to use some sort of spliter to split the RCA out from the DAC into both the amp and subwoofer. I'm not sure if this is an optimal solution. Any suggestion on what is the best for my system?