Asahi Kasei Microdevices (AKM), a subsidiary of Asahi Kasei, has unveiled the AK491x series of premium audio operational amplifiers (op amps). These new devices mark a significant expansion of AKM’s analogue audio portfolio and will be on display at HIGH END Vienna 2026 from June 4th to 7th at Austria Centre Vienna in Hall X2, Booth E07.
AKM extends its VELVET SOUND™ philosophy beyond the DAC (digital-to-analogue converter) and into the analogue output stage with the introduction of the AK4911 and AK4912, single- and dual-channel op amps.
As DAC performance has continued to evolve, spearheaded by products such as AKM’s AK4499EX, audio designers have found a dearth of op amps that can leverage these aural advances. AKM’s AK491x series delivers upgraded audio performance, with ultra-low noise and distortion characteristics—noise density of 0.96 nV/√Hz and THD+N of −150 dB at 1 kHz—that are unachievable with conventional op amps. An ample ±100 mA output-drive capability enables these new devices to maintain excellent THD+N characteristics even under the most demanding load conditions, such as 8-channel current summing in DAC applications.
“These are groundbreaking specifications, but the AK491x series was designed with a focus on the listening experience,” said Seiko Nakamoto, Lead Expert – Audio Product Development. “Sound quality cannot be fully defined by numerical values alone. AKM’s development process placed equal emphasis on volume balance, transparency, spatial expansion, and perceived weight. The next frontier for sound quality lies in op amps that achieve both outstanding measured performance and a qualitative musical experience ‘as if you were there.’”
The Asahi Kasei Microdevices booth at HIGH END Vienna 2026 will showcase the AK491x series along with a sound-field correction demonstration for home audio. Technical discussions and listening sessions conducted by AKM engineers and Audio Meisters will be available by appointment at booth E07.
Samples of the AK491x series op amps are currently available, and mass production is scheduled to start in early 2027.
To learn more about the AK491x series, visit Asahi Kasei Microdevices’ official website.
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