The best way to tell is, for $100 buy a full set of five, the Mirage omni's. Go to Parts Express and type in 'Spherex. where you will find a close out. Google the Spherex and you will find some hi-end reviews of these units. I have the original Sppherex xbox system. Unbelievable! You could also only buy two for $40. How can you lose?
