I have a current Yamaha Reciever RX-V490. Its a sucky Prologic Receiver but it gets the job done by powering my 4 speakers. 2 connected to A and 2 Connected to B and both are pressed. Now, whats lacking is a subwoofer. This receiver has no Sub Outs .. any Ideas on where I can connect the subwoofer ?? Im gonna get an Active Subwoofer. Something like a Wharfedale SW-150.. and I was hoping if i could connect them to my Headphone Outs ???