The 8.9-inch model has a resolution of 2560 by 1600, for 339 pixels per inch, a 2.2GHz quad-core processor, gets 12 hours mixed-use battery life, or 18 when reading, includes the 8-megapixel rear camera, measures 9.1 by 6.2 by 0.31 inches and comes with the same storage and connectivity options.
As for pricing, Amazon CEO Jeff Bezos told NBC in an interview to promote the new tablets, "We make money when people use our devices, not when they buy our devices," He added that pricing is "roughly break-even."
What that means in more specific terms is the 7-inch Fire HDX starts at $229 with WiFi only, and $329 with WiFi and 4G Long Term Evolution (LTE). The 8.9-inch HDX starts at $379 for WiFi only, or $479 with also LTE connectivity.
Amazon also introduced new Origami covers that attach magnetically and fold to help the tablets stand upright in landscape or portrait positions. The cover for the larger HDX also features a fold-away section that offers quick access to the rear camera lens.
"It's been just two years since we introduced the first Kindle Fire, and the team is innovating at an unbelievable speed," Bezos said in a Sept. 25 statement. "We've worked hard to pack this much hardware, innovation and customer obsession into these prices."