From an ultra-high output that can run even the most delicate headphones, to the Triple Output design, and the complex amplifier design with minimal noise in a compact portable audio player, this would all not have been possible without AK's Ultimate Sound Solution, TERATON ALPHA. Astell&Kern has taken the TERATON ALPHA to the next level with its know-how in noise reduction at ultra-high power, acquired from its predecessors such as the KANN MAX and the CA1000 series.

TERATON ALPHA, engineered through continuous research, is Astell&Kern's unique technology that has been designed to produce audio playback that is as close to the original sound through effective power noise removal, efficient power management and unwavering amplification, and a fully converted audio output interface.

The KANN ULTRA's brand new triple output circuits adopt an ultra finessed sound design, applying a fully discrete design from the decoding section all the way to the amplifier section.

In the decoding section, two flagship-level ESS ES9039MPRO chips separately decode the left and right audio channels, which can more effectively reduce interference from other sound sources or the environment, lower the possibility of crosstalk, and provide a purer, clearer sound with more accurate sound spatial positioning.

Additionally, the KANN ULTRA specially designs dedicated amplifiers for single-end amplification (3.5mm port) and balanced amplification (4.4mm port) respectively, which can better meet the requirements of the corresponding amplification methods and provide higher sound quality performance and more precise sound.

In a headphone environment in which the left and right channels are clearly separated, ear fatigue may increase during prolonged listening. The moment you turn on Crossfeed, the experience of crisp, but comfortable sound begins.

Crossfeed mixes parts of the original signal from one channel and sends that signal to the opposite channel with a time difference to center the sound image.

Through the use of detailed settings such as Shelf Cutoff, Shelf Gain, and Mixer Level, you can set the level of crossfeed according to your listening preferences.

In addition to supporting high-definition Bluetooth audio encoding up to 24-bit (aptX-HD/LDAC), allowing streaming of 24-bit/96kHz audio over Bluetooth connections with speeds of up to 990kbps, the KANN ULTRA additionally supports LHDC low latency high resolution audio coding, the second Bluetooth audio coding specification certified by the Japan Audio Society that complies with the Hi-Res Audio Wireless standard, allowing users to enjoy high quality lossless music formats even with wireless Bluetooth products.

Additionally, the KANN ULTRA also simultaneously supports the AK File Drop function, where users simply need to connect their smartphones, computers or personal FTP file systems to the same network to wirelessly transfer music files from their personal devices to the player, adding efficiency to music file management. The KANN ULTRA further supports BT Connect function, where users simply need to connect the player to the audio source device to stream playback wirelessly.