Subwoofer

[Tino916]

I would like to hook up a sub woofer to my Willseton R8. I am running a turntable but struggling on how I can accomplish this as my speakers need a little help on the low end. My turntable has a pre amp but I can by pass if needed which I am currently doing and sending turntable to a small pre amp then to R8 which is providing much better sound but still lacking on the lows hence the need for a sub..