For sale: TOPPING A90. This is a cost-effective amplifier that was previously introduced by a certain YouTuber. It can drive even demanding headphones and is a versatile unit, excellent as both a headphone amplifier and a preamplifier. The specs are incredibly high, capturing even the most delicate nuances, and it's an amplifier that delivers clear and powerful sound faithful to the source with amazing transparency and precise sound positioning. I am selling it because I am upgrading to high-end equipment. ✅Highlights • Designed with NFCA for ultra-low distortion and high S/N ratio • Solid output, perfect for those who want driving power • Clear and open sound (easy to feel separation and positioning) Terminals (※All items are as shown in the photos) • 4-pin XLR balanced • 6.35mm unbalanced • 4.4mm balanced • XLR, RCA input output Specs (Reference) • Ultra-low distortion: <0.00006% • Dynamic range: 145dB • Ultra-low noise: <0.2uVrms • Ultra-low output impedance: <0.1Ω • Maximum output: 7600mW ×2 • NFCA (Nested Feedback Composite Amplifier) Strengths of the Topping A90 based on its specs • THD+N 0.00006%: Distortion suppressed to the extreme • Dynamic range: 145dB for delicate and powerful reproduction • Equipped with NFCA, it creates a sound image that emerges from silence • Maximum output: Amazing power of 7600mW ×2 Included items • Main unit, cables, stereo conversion plug No pets / No smoking. Please understand that this is a used item, so there may be minor scratches. Thank you for looking.