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News
AKM proposes D/A Separation Solution for High-end Audio DAC achieving Real Live Sound
2020-03-04 | Return
Asahi Kasei Microdevices Corporation (AKM) has expanded its lineup of premium audio Digital-to-Analog converters (DACs) with the development of a two-chip solution that separates the digital aspect from the analog. While conventional DACs use a single chip to convert signals from digital to analog, these new products split the conversion process between the AK4191 delta-sigma modulator and the AK4498 DAC. This innovative approach has resulted in an improvement in sound quality that is easily perceptible while listening to music.
The AK4498 is available now. The AK4191 will be sampling in Q2 2020.
Features
Complete separation of digital and analog provides a pristine listening experience
By using two ICs, AKM has minimized the effects of digital noise within the analog output, resulting in a perceived improvement of the ratio of signal to noise. This improvement, while not easily quantifiable via traditional measurement techniques, is easily experienced during controlled listening tests.
AK4191 - Enhanced digital signal processing capability
The AK4191 has increased the oversampling rate of digital processing to 256x from the previous 8x. This allows for aliasing artifacts due to sampling to be driven even further into the upper frequency range. Additionally, the AK4191’s digital filters can reduce noise by 50 dB more than previous devices.
・Premium delta-sigma modulator with multi-bit output
・Sample rate: 32kHz - 1.536MHz, DSD1024 (44.8MHz)
AK4498 - Dynamic sound with vast playback resolution
The AK4498 is a product of AKM’s VELVET SOUND Premium Audio manufacturing process, also used for the flagship AK4499 DAC and the preceding AK4497. This process results in much-improved noise immunity in general, and increased low-frequency noise performance in particular.
・Premium D/A converter with multi-bit modulator data interface
・THD+N: -116dB
・DR, SN: 128dB
Applications
High-end Audio
Active Speakers
CD/SACD Players
Network Audio
USB DACs
Source：http://www.akm.com/