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963 requests
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15 Sold
Product Description
At the top of Topping’s highly regarded A-series, the A90 is a headphone amplifier with few rivals. Capable of functioning as both a headphone amp and a preamp, this flagship unit is outfitted with NFCA (Nested Feedback Composite Amplifier) modules, which work together with ultra-high-gain feedback technology for impressive AC and DC control Read More
No, the A30Pro is when it detects 250 ohm or higher, but the A90 isn't. It runs really cool compared to a class A. Lightly warm to the touch but barely noticeable.