Actually the Delta 10's had to be brought in because until this project, we didn't use them in anything and had no need to maintain stock. We always have a bunch of Alpha 10 drivers in stock because they are used in our most rapidly selling speakers. The π midhorn was designed specifically with the Delta 10 and JBL 2012 in mind. It's intended use is primarily with π cornerhorns, but it has general purpose applications as well. Other attractive uses are with Klipschorns and Klipschorn clones, and for vocal range in prosound systems too.I bolted one of the midhorn prototypes up to a pair of two π's and a pair of two π towers and was impressed. Then I connected up the crossover and hacked up a speaker that was equivalent to what was to become the eight π speaker. Its rear chamber volume and vent was formed by an existing two π tower speaker and the tweeter was a PSD2002. I found that the speaker sounded excellent, so the eight π speaker was born. It was an attractive afterthought. I think it looks cool and sounds great, so I gave it a name and placed it in the line. It really takes the place of a five π cornerhorn in design style and quality/price point.