This isn't the first passive Spark that Mark has announced. The Spark XC/XB/XC1 was another from 2 years ago and 1 year ago which has vanished without a trace never actually making it to market. It's an Axpona tradition for the least the past two years.
Hence the lack of build up about the Ember offering. The intended first run of Sparks were killed by an issue our cabinet shop didn't identify until after running the sample batch first demonstrated at Axpona. Last year's demonstration included the larger version with dual 8" passive radiators, which were sidelined due to an issue with supply and consistency in the HF diaphram I specified. Of course any change of the HF device changes the passive crossover. We have supply of the coaxial driver settled and now are working out the last details of the passive crossover. This year both speaker series will be available for order at the the time of the show with reasonable quantities available in 2-8 weeks for different versions.
Seaton Sound, Inc. firstname.lastname@example.org 773-290-8436