Great pair of entry level iems, especially for the price. I wish they came with a pair extra small sancai ear tips (the smalls are just a little too big for me) but that’s just a matter of how my ears are built. Been loving them so far!

Portable Balanced DAC Headphone Amplifier - Yulinglong
Two high-performance balanced DACs (AK4493SEQ)
PCM 32-bit/768kHz
Native DSD 64/128/256
CNC aluminum alloy unibody
Hi-Res certified
Practical buttons: Volume +/-, Play/Pause
Sampling rate indicator
Compatible with all platforms
1. AK4493SEQ DAC
1. AK4493SEQ DAC
The Yulinglong utilizes the AKM AK4493SEQ DAC, delivering studio-grade sound quality with ultra-low distortion, a 123dB signal-to-noise ratio, and AKM's signature VELVETSOUND™ architecture, ensuring natural, detailed, and lifelike audio performance for high-fidelity and professional applications.
II. Output Connectors
4.4mm balanced jack, 240mW + 240mW @ 32Ω in high gain
3.5mm single-ended jack, 125mW + 125mW @ 32Ω in high gain
III. Multiple Filter Modes
M1 High Resolution Mode
With a sharp high-frequency cutoff, it precisely separates signal from noise, effectively purifying the background and delivering precise, clean sound with fast response and intact high frequencies.
M2 Detail Enhancement Mode
Through clean high-frequency management, it eliminates all interference and reproduces precise and detailed details.
M3 Pure Detail Mode
Delivers a cleaner, more detailed sound with low-latency processing and a gentle high-frequency rolloff.
M4 Smooth Mode
Gently processes high-frequency signals for a smoother, more fluid sound.
M5 Analog Mode
Gently reduces high frequencies for a warm, natural, and analog-like sound. M6 Precision Mode
Low-latency digital filters maintain timing accuracy and phase coherence for a more natural and precise sound.
IV. Oriental Aesthetics
Amplifying Tangzu's Traditional Chinese Style Design
This DAC/amplifier is inspired by the "Yu Linglong," a symbol of refinement, wisdom, and inner aura. Its design embodies the harmonious unity of Eastern aesthetics and modern engineering, capturing the essence of traditional Chinese culture.
The Yu Linglong is a masterpiece of exquisite craftsmanship, featuring a precision CNC-machined alloy body engraved with intricate patterns that reflect the elegance of ancient Chinese architecture. Every curve and cutout detail is meticulously crafted to perfectly showcase the AKM AK4493SEQ DAC chip at its core—the heart of pure, high-resolution sound.
Designed in silver and gold, the Yu Linglong is both an audiophile tool and a work of art, blending form and function to express Tangzu's commitment to excellence.
5. Convenient Design
Your Everyday Companion
Main Button
Press and hold to power on and enable UAC 1.0 mode.
Short press and single press: Play/Pause; answer/end a call (Note: Some consoles, such as iPhones, may not respond to the answer/end button).
Short press and double press: Next track.
Short press and triple press: Previous track.
Press and hold for 1 second to switch to level mode.
-Button
Press and hold: Decrease volume by one level.
Press and hold: Decrease volume by one level.
Press and hold: Increase volume by one level.
Combination Button
Press and hold both buttons simultaneously for 1 second: Switch filter mode.
6.3.5mm & 4.4mm Ports
Equipped with 3.5mm single-ended and 4.4mm balanced outputs, the DAC and headphone amplifier are fully functional. This configuration ensures optimal compatibility and performance in a variety of scenarios, from digital media streaming to traditional audio systems. Type-C Interface
The USB Type-C interface provides wide compatibility, faster and cleaner data transfer, and stable power supply—ensuring the DAC performs at its highest potential on all modern devices.
7. Plug and Play
Multi-Platform Compatibility
Compatible with the Apple ecosystem (e.g., macOS, iPadOS, iOS), as well as Android, Windows, and Linux devices.