I have a single Diamond Audio Hex crossover that I won in an Ebay auction. For some reason, the seller split the pair up and sold them separately and, of course, I won one auction and somebody outbid me at the last second on the other one. One crossover does me no good. Maybe someone on here needs a single one. I paid $12.50 for the crossover and $10.00 for shipping. I'll sell it for $20.00 shipped.