Product Review

Astell & Kern AK XB10 Portable Bluetooth Amplifier with DAC in Black The AK XB10 delivers a distinctive difference in sound from conventional Bluetooth products. The moment you hear it, you wonder Does this sound really come from Bluetooth?Astell&Kerns outstanding technologies are throughout aptXâ„¢ HD to support 24bit/48kHz Bluetooth performance, along with DAC and AMP, essential components of fine audio. The utmost in Bluetooth listening pleasure: AK XB10. While the AK XB10 is a device that wirelessly transmits audio data from smartphones via Bluetooth, it is quite different from conventional Bluetooth devices, in that it supports the aptXâ„¢ HD Bluetooth codec. Just as the display resolutions of televisions evolved from standard to high-definition to 4K ultra-HD for sharper image quality, we are now in the era in which Bluetooth now supports 24-bit audio resolution. 24-bit HD audio that was simply not possible with previous Bluetooth technologies can now be fully enjoyed with aptXâ„¢ HD. Typically used in professional broadcasting, the original aptXâ„¢ audio codec is widely used for 16-bit near-CD quality sound. The benefits of the aptXâ„¢ codec include superior compression, low computational cost, and low transmission delay. Launched in early 2016, the next-generation aptXâ„¢ HD codec is capable of transmitting up to 24-bit/48 kHz audio that is faithful to the original audio file. This is known as a 2.5 mm sub-mini audio connector. It's also known as a balanced connector. Modes of transmitting an analog signal can be divided into balanced and unbalanced. An unbalanced connection typically consists of a signal (L + R) and the ground. The ground is supposed to prevent external noise, but noise can still be introduced to the signal and can affect transmitted signals that causes variations and noise in sound. The balanced connection was developed to reduce ground noise as the signal is transmitted