TOPPING A90 Discrete HiFi Headphone Amp, NFCA 4-Pin XLR/4.4 Balanced/6.35mm SE Output Pre-Amplifier with Blutooth Remote Control (A90 Discrete-Black)

TOPPING A90 Discrete HiFi Headphone Amp, NFCA 4-Pin XLR/4.4 Balanced/6.35mm SE Output Pre-Amplifier with Blutooth Remote Control (A90 Discrete-Black)

• 【Fully Discrete NFCA for Superior Sound】 – The TOPPING A90 Discrete features 4 NFCA-Discrete modules with 39 transistors each, ensuring high output, strong current, and low impedance for effortless headphone driving.
• 【Re-Optimized Circuit for Ultra-Low Noise】The TOPPING A70 Pro’s newly developed input stage boosts noise performance and input impedance (20kΩ) for better device compatibility, while the gain architecture minimizes noise at high gain settings.
• 【Ground Loop Noise Terminator】 – Use the GND/LIFT switch to eliminate ground loop noise. Set to GND by default, switch to LIFT if noise occurs for uninterrupted audio.
• 【Headphone Amp & Preamp in One】 – Functions as both, with 20Ω SE and 40Ω balanced output impedance, ensuring compatibility with various power amps.
• 【Expanded Inputs with Ext90】 – The A90 Discrete has XLR and RCA inputs but expands to 4 XLR and 2 RCA with the Ext90, plus a 12V Trigger for easy device sync.
• 【Precision R2R Volume Control】 – Uses relay and resistor networks for precise, durable volume control, ensuring accurate channel balance and remote convenience.
• 【Volume Memory for Convenience】 – Remembers volume settings for PRE, HPA, and PRE+HPA modes, restoring previous levels automatically for seamless use.