At the 2024 CES exhibition, Questyle unveiled the second-generation Mobile Headphone Amplifier with DAC M12i.

Following the success of the first-generation M12, which has been sold out in tens of thousands of units, the M12i also features high-performance audio signal processing. It breaks through the limitations of integrated audio circuits in phones in terms of technology, cost, and size. With Questyle’s unique Current Mode Amplification paired with the ESS flagship USB DAC chip, it allows users to fully enjoy lossless audio content from streaming platforms with traditional HiFi headphones, ensuring the best audio experience.

The “i” in M12i indicates that it has been certified by Apple MFi. MFi certification ensures perfect support for iPhone/iPad and seamless integration into the Apple ecosystem. It complies with Apple’s stringent requirements for external devices in terms of power consumption and compatibility, avoiding the risk of damage to phones and systems from arbitrary USB device pairings.

Questyle’s exclusive patented “Current Mode” amplifier technology is the fundamental hardware that sets Questyle apart from other terminals. As the “engine” of the headphone system, the amplifier has a crucial impact on sound quality. The independently developed Current Mode amplification module operates differently from products that use traditional operational amplifier (op-amp) chips for amplification.The M12i has ultra-low distortion of 0.0003% and extremely high current output capability. Thanks to the patented Current Mode amplification and the use of TOREX’s efficient power management system, it features high-performance and low-power consumption, lowering the risk of overheating or experiencing interruptions during use.

Thanks to the patented Current Mode amplifier technology, M12i’s noise floor is below -130dB, ensuring no noise when listening to music with high-sensitivity earphones.

M12i has an extremely wide frequency response of over 80kHz, making it a true Hi-Res device.

When headphones are plugged into the M12i, the built-in smart impedance detection system automatically identifies the headphone impedance and adapts accordingly, much like an automatic transmission in a car. Upon detecting the insertion of headphones, M12i instantly activates working mode, recognizing and configuring the corresponding gain for the connected headphones. If the M12i is connected as a mobile DAC to Hi-Fi systems, active speakers, etc., it will automatically switch to high-level output, providing sufficient support for Hi-Fi audio systems.

 The M12i features the updated ESS flagship USB DAC chip, ES9281AC, supporting a maximum PCM768 and DSD512 D/A converting capability (M12 supports a maximum of PCM384 and DSD256). Audio distortion performance and output power have been upgraded relative to the previous generation.