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Topping A90 Discrete Headphone Amplifier Selling my A90 discrete as I no longer need it, has been running my Susvaras very well. Includes the remote, the box and power cable. Can ship at buyers expense. Condition: Excellent Payment Method: EFT, PayID, Cash on Pickup Region/State: (WA) Western Australia/Australia By Swifty 0 Comments AUD $450 Date: February 8, 20251 yr
# Topping A90 Headphone Amplifier – Buyer Notes
At AUD 450, this asking price sits squarely above the used market median of AUD 419 for recent comparable listings, putting it in the 75th percentile range (AUD 444). You're paying a modest premium—roughly 7% over median—which is defensible only if the unit is in excellent condition with all original packaging and accessories. For context, used A90s typically trade between AUD 326 and AUD 444, so AUD 450 requires the seller to justify why this particular example commands top-tier pricing. If cosmetics show wear or accessories are missing, this becomes an easy pass.
Before committing, verify the unit powers on cleanly with no channel imbalance and confirm the volume pot tracks smoothly across its range—the A90's stepped attenuator can develop channel drift with age. Ask specifically what's included: the original USB cable, IEM adapter, and any documentation matter for resale value. Request photos of the rear connectors and interior if possible; the A90 runs warm, so look for any sign of thermal stress or capacitor bulging. If the seller can't demonstrate it under load for 15 minutes without distortion, walk.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Topping Audio, founded in 2008 in China, emerged from a team of dedicated audio engineers committed to democratizing high-fidelity sound. Without a single prominent founder in the spotlight, the brand quickly distinguished itself through rigorous innovation, amassing over 20 patents and pioneering technologies in digital audio processing. This heritage of independent R&D, backed by more than 30 experienced engineers, has positioned Topping as a global Hi-Fi contender focused on precision and accessibility.
The company specializes in desktop and portable audio gear, excelling in digital-to-analog converters (DACs), headphone amplifiers, and power amplifiers. Flagship models like the D90 DAC showcase cutting-edge components, such as the AKM AK4499EQ chip, delivering studio-grade performance. Topping also offers audio interfaces and, under its TOPPING Professional sub-brand, pro-level solutions for demanding studio environments, all emphasizing meticulous testing for reliability and sonic purity.
In the competitive hi-fi market, Topping occupies a mid-tier niche as an audiophile favorite, renowned for punching above its weight with exceptional value. Praised for build quality, intuitive design, and uncompromising transparency at affordable prices, it rivals pricier brands while earning loyal followings on forums and among desktop enthusiasts seeking high-end results without premium markups.
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