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Astell and Kern AK70 24bit 192kHz bit to bit Playback Digital Audio Player Black Edition The AK70s DAC based on market proven CS4398 chips of Cirrus Logic has been used for years in Hi Fi audios and the second generation Astell Kern devices. The AK70 plays back 24bit 192kHz signals into bit to bit type 32bit audio is downsampled using a sample rate converter. In addition DSD 64128 can be played back through conversion to PCM. 32bit 384kHz is downsampled to 24bit 192kHz and 32bit 352kHz is downsampled to 24bit 176kHz for playback DSD 64128 is converted via DSD to PCM to PCM 24bit 176kHz for playback. Support for balanced headphones The AK70 supports the 2.5 mm 4 pole balanced output 2.3 Vrms that has been in use since the second generation of the Astell Kern players. Unlike the unbalanced type the balanced output type is capable of removing noise common mode noise that can occur in signal inverting amplifier signal and has the strength of increasing output due to its double transmitting signals. The AK70 can be used with a variety of balanced earphones and headphones made for Astell Kern. It can also support the 3.5 mm 3 pole unbalanced output 2.3 Vrms with compatibility with a variety of Hi Fi earphones and headphones. AK70 USB DAC Mode The AK70 supports USB audio digital out first among AstellKern devices. The AK70 can be used with a USB DAC that can double as an embedded sound card by connecting with a PCMac through the USB port. In the case of using the PCs embedded sound card one may have to go through a complicated process to play back DSD data. In contrast the AK70 can do so simply by connecting with the PC. In the case of using the AK70 as a USB DAC it can support up to ...
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