subwoofer

Hello, After reading a review on WHAT HI FI I decided to buy a Denon D-M41DAB. Im looking into making the best possible out of the system knowing it is a starting point anyway. The review actually recommend to use the Denon speakers. It is worthy to add to the system a subwoofer? and which one...

I have a set of Logitech Z333 speakers which has a powered subwoofer and I have my Yamaha RN-602 reciever, which has a powered subwoofer-out port. My question is what cable do I need to connect my powered sub to the Yamaha? I have a cable (advertised as a subwoofer cable) which has RCA red and...