Electronic Accessories ｜Topping A50s Headphone Amplifier [DEMO UNIT]

DEMO UNITThis product has been tested and assessed by our team, and is sold in working and resellable condition.

This product may feature minor physical blemishes, and may therefore not be in pristine physical condition. If there is any notable blemish present however, we will provide additional information below this disclaimer, accompanied with photos above which highlight the notable imperfections listed.
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*If applicable* - This product has been tested to ensure that the device functions, and the battery discharges properly. Unfortunately we cannot provide any exact charging or battery life information.
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This product comes with full warranty as per the Warranty section on this listing unless otherwise specified. If there is no warranty period outlined in the Warranty section below, please get in touch with our Customer Care team for more information.

2 step gain settings, adapt to various sensitivitiesA50s is equipped with two gain settings of 0dB/6dB at SE output(6dB/12dB at balanced output). Wide range of gain settings and the 0.3uVrms ultra-low noise makes A50s easily adapt to all types of headphones from extremely sensitive IEMs to most power demanding full-sized over-ears.
Also an excellent preampThe NFCA modules of A50s are not only able to drive the headphones but also apply to be a preamplifier with the same ultra-high performance. When it is in preamp mode, output impedance is as low as 20ohm, which is widely suitable for various devices.
HPA/PRE automatic switchingWhen the A50s is not connected to any headphones, it automatically works in the preaplifier mode, and the amplified signal is output from the RCA on the back panel. When the headphone is connected to 6.35mm or 4.4mm output, A50s automatically switches to the headphone amp mode, and lhe signal is only output to the 6.35mm and 4.4mm jack.
Ultra-High Performance NFCA balanced modulesA50s uses the same NFCA (Nested Feedback Composite Amplifier) module from flagship A90. Voltage Current hybrid feedback architecture along with UHGF (Ultra High Gain Feedback) technology provides excellent DC and AC performance. High output current drive capability allows the amp driving low impedance headphones with ease. Ultra-low noise of 0.3uV is miles ahead of the competition, giving an absurdly high dynamic range of 144dB and no audio noise and darkest background for the most sensitive IEMs.
Full Aluminum caseA50s uses full aluminum case with unique workmanship. The outer casing is made of an aluminium brick through CNC precision machining. The outer casing is designed with thermal conductive column to dissipate heat from the power supply and OP-AMP through the entire outer casing.
6.35mm SE & 4.4mm balanced outputAlthough there is only a single-ended input, A50s has a built-in balanced amp circuit. Therefore, it can drive single-ended headphones by 6.35mm output, and drive balanced headphones by 4.4mm balanced output.
Wide range of adaptation to headphonesA50s has a high voltage swing of 42Vp-p, power of 3500mW per channel when both channels are driven and output impedance of less than 0.1 Ohm. It easily drives power-hungry headphones with a wide range of different impedance.
Brand:TOPPINGSKU:TOP.A50S.BK.DEMO.1654123Tags:2025_BlackFridaySale, 2025_EOFY_Sale, 2025_FlashSale_0707, 2025_FlashSale_0708, 2025_HalloweenSale, 2025_IMPBF_TIER2, [merged] Category_Desktop Headphone Amps and DACs, add-to-cart, Brand_Topping Audio, Category_Desktop Headphone Amps and DACs, Colour_Black, Colour_Silver, SHOP - No Oversell, SHOP - Permanent Demo ClearanceColour:Black