Asgard 2 + JBL LSR305 + SUB?

[Fuzziekiwi]

Recently bought LSR305's and would like to add a sub to my computer setup. They are currently hooked into my Asgard 2 using dual TS to dual RCA. Is there a way to add a sub (Polk Audio PSW10), what cables/connections would I need to get this working? Would I have to buy a different audio interface?

 

[americanaudiophile]

Split the output of the Asgard2 with a pair of 1 male RCA to 2 female RCA Y splitters.
Connect both the sub and speakers to the outputs.
If you find yourself over driving the JBLs you can put two of these
https/www.amazon.com/FMOD-Crossover-Pair-High-Pass/dp/B0006N41KG
inline to remove bass from them that the subwoofer is adding back.