I'm in NY... shipping for one Monoprice 12" sub is $44 and change. Not negligible.
Interestingly, entering a NY zipcode shows the $44 "Standard 3-5 Business Days" shipping as the lowest cost method, but when I enter my AZ zipcode, I not only get the "Standard 3-5 business days" shipping rate of $37, but additionally a "Monoprice 1-2 Business Days" option of just $17.
Apparently customers in California, Nevada, Arizona and New Mexico can take advantage of Monoprice's GSO (Golden State Overnight) shipping rates.
Other thing I noticed: No phase switch at all? Is that potentially a problem for a swarm application?
I would think not only might a phase switch be useful, but a variable phase control (instead of a 0° - 180° switch) would be even better.
Steve