TOPPING A90 Discrete HiFi Headphone Amp
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)
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The TOPPING A90 Discrete HiFi Headphone Amp was $599 when we checked it on 2026-10-12. It has not moved from that price across 10 checks since 2026-08-12.
【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 E
TOPPING A90 Discrete HiFi Headphone Amp price history
10 weekly checks of our own, from 2026-08-12 to 2026-10-12. How our price tracking works
$599.00 at all 10 checks we have taken, Aug 12 to Oct 12, 2026.
Every observation (10)
| Date | Price | Source |
|---|---|---|
| Aug 12, 2026 | $599.00 | Weekly check |
| Aug 17, 2026 | $599.00 | Weekly check |
| Aug 24, 2026 | $599.00 | Weekly check |
| Aug 31, 2026 | $599.00 | Weekly check |
| Sep 7, 2026 | $599.00 | Weekly check |
| Sep 14, 2026 | $599.00 | Weekly check |
| Sep 21, 2026 | $599.00 | Weekly check |
| Oct 1, 2026 | $599.00 | Weekly check |
| Oct 5, 2026 | $599.00 | Weekly check |
| Oct 12, 2026 | $599.00 | Weekly check |
About this item
- 【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
- 【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.
Details
- Brand
- TOPPING
- Model Number
- TPA90D
TOPPING A90 Discrete HiFi Headphone Amp: common questions
Is the TOPPING A90 Discrete HiFi Headphone Amp worth it?
【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 E Its Amazon listing shows 3.3 out of 5 stars across 5 ratings, which is the retailer's figure and not our verdict.
How much does the TOPPING A90 Discrete HiFi Headphone Amp cost?
The TOPPING A90 Discrete HiFi Headphone Amp was $599 when we checked it on 2026-10-12. Prices change often, so the live retailer link carries the current number.
Is now a good time to buy the TOPPING A90 Discrete HiFi Headphone Amp?
We have checked the TOPPING A90 Discrete HiFi Headphone Amp 10 times since 2026-08-12 and the price has not moved from $599. Our record shows no drop and no rise.
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