The Needles was a Jim Griffin design. It used a relatively large number of small (3" I believe) high quality midwoofers with a single centrally located Aurum Cantus ribbon tweeter. It received very positive reviews at a DIY event where it was heard by other speaker builders.I've built a few "extreme-budget" arrays using a single centrally located tweeter, but for any array costing serious dollars my choice is always to buy the plans for a proven design by an expert like Jim, who has the knowledge, test equipment, and experienced ears needed to optimize a design. You pay a few dollars more, but you get a well designed speaker.