First, meet Ella. Blue's new planar magnetic wired headphones feature the same hinged design we saw on Mo-Fi and Lola with a built-in amp to drive the sound. The key feature here is that planar magnetic tech that offers better frequency response and less distortion than typical cone drivers. Perhaps you'll recall Audeze's Sine headphones that packed the usually bulky tech in a lightweight on-ear pair for $450. The Sine also features a combo amp and digital-to-analog converter (DAC) attached to its Lightning cable.

Blue argues that most planar magnetic headphones "sacrifice impact to achieve higher levels of detail," which creates a sound "that's more clinical than emotional." The company says Ella offers both the power and the detail thanks to the built-in 250mW audiophile-grade amplifier. It also claims to be the first to offer that component in a set of planar magnetic headphones. While the sound from Ella should be quite good, a list price of $700 means these aren't for everyone.

For those on tighter budgets, Blue has a more affordable option that still offers a built-in amp. That second set of headphones, officially called Sadie, also carry that familiar hinged design we've seen before from the company. It's appropriate that Blue kept the look that debuted with Mo-Fi as the company says Sadie builds on what its original set of headphones started with "vastly improved performance and superior sound." Changes to the drivers and overall audio give Sadie the ability to perform better and showcase more detail in your music collection than its elder sibling. The best part? Sadie costs a more reasonable $400.

Just like Mo-Fi, both Ella and Sadie feature three-way controls for turning the built-in amplifier off or selecting between "On" and On+" modes. Blue says that while the hinge design remains mostly the same, there were some changes to the headband to cut down on the weight and increase comfort. Both devices arrive soon, with the Sadie going up for pre-order this month and Ella set to ship around the same time.