Wayne Parham Messages: 18789 Registered: January 2001
Illuminati (33rd Degree)
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I'm not going to investigate the TD15 because I already have an upgrade path for the four π and seven π loudspeakers using the JBL 2226 woofer.
The three π and four π speakers are almost identical in size and response, with the biggest difference being the four π is 3dB louder given the same input.
I am extremely happy with the performance of both models, especially when fully upgraded with all the best driver options. The way I see it, the choice for the prospective owner becomes whether they want the best "corporate" speaker or the best "craftsman" speaker. JBL has all the resources for R&D and brings all that to bear when developing drivers. AE has very dedicated craftsmen who have done a great job too, making hand crafted drivers that also have all the right technologies. In my mind, there is no winner, both are excellent. It's like making a choice between the best that Porsche can do or the best that Ferrari can do. Both are excellent.