The 10% off coupon on Amazon isn't available for the black model, but using the code does drop the black to $39.59. I believe $33.59 is the lowest price ever on one of the best portable Bluetooth speakers in this category. Coupon code is STORMBOX8. $20.40 off for code, $6 off for 10% code. Smokin' deal and this code could end at any time, so act fast.
EDIT: It looks like the Amazon 10% coupon may no longer be showing up.