This Topping D90 DAC MQA is a rare find for audiophiles who are looking for high-quality devices to enhance their music listening experience. With the rare AKM 4499 original DAC chip, this Topping D90 DAC is a must-have for anyone who wants to enjoy great sound quality without harsh upper midrange tones that can lead to listener fatigue. The original AKM 4499 DAC chip that was produced until the factory was destroyed by fire is well-known for its high-quality grain-free sound reproduction, and this DAC has it in spades. This model also decodes MQA encoded music files (mostly used with Tidal streaming). It is perfect for those who want to listen to music with ease and enjoy the clarity of sound that it provides. Whether you are a music enthusiast or just someone who wants to enjoy great sound quality, this Topping D90 DAC is a great choice.