[NinjaMilez]

I'd like to use a 2.1 setup with my PC using a Wharfedale SW 150 sub-woofer and a pair of Wharfedale Diamond 9.1 speakers with an Audioengine D1 amp/DAC but I'm not totally sure how to set it up.
 
The thing that is confusing me is that the Wharfedale Diamond 9.1 speakers have four inputs. Two red and two black. What is with this?

 

[cel4145]

You need a speaker amplifier for the Diamond 9.1s. The D1 is a dac/headphone amp.

The extra inputs are for people that want to biwire. Did the speakers come with the metal jumpers connecting the positives and the negatives?