SKU: 80499832841

TOPPING A50S Balanced Headphone Amplifier AMP Preamplifier

Sale price$128.69 Regular price$142.99
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Description

TOPPING A50S Balanced Headphone Amplifier AMP PreamplifierMeet The New A50s TOPPING designed the aluminum chassis of the new A50s for maximum durability and heat dissipation. The casing CNC machined to precision from a solid block of aluminum and accommodates a thermal conductive column. The thermal column transfers the heat generated from the op amps and power supply to the surrounding aluminum case, dissipating the heat. Optimized design allows the A50s to maintain its tiny footprint, preserving a good

 

Meet The New A50s

TOPPING designed the aluminum chassis of the new A50s for maximum durability and heat dissipation. The casing CNC-machined to precision from a solid block of aluminum and accommodates a thermal conductive column. The thermal column transfers the heat generated from the op-amps and power supply to the surrounding aluminum case, dissipating the heat.

Optimized design allows the A50s to maintain its tiny footprint, preserving a good appearance with no seams or visible screws. Aluminum is an excellent material because of its high thermal conductivity and structural strength.

 

Ultra-High Performance Balanced NFCA Modules

NFCA modules result from TOPPING’s intensive research and development into headphone amplification technology, and the flagship A90 was the first amplifier from TOPPING that incorporated these modules. NFCA modules ensure low noise levels and distortion under all conditions and when used with all headphones.

The A50s leverages TOPPING’s revolutionary NFCA (Nested Feed Composite Amplifier) modules in a balanced configuration. Besides the balanced NFCA modules, A50s also uses ultra high gain feedback (UHGF) technology.

A revolutionary voltage-current hybrid architecture provides exceptionally low noise and distortion performance. The result is a drastic improvement in sound quality, with no hint of noise or distortion.

The high current output makes the A50s suitable for driving low impedance, while the high voltage output benefits high impedance headphones. A virtually nonexistent ultra-low noise floor of 0.3uV makes the A50s it a superb choice for sensitive IEMs.

High power output, exceptional dynamic range, and an unprecedented ultra-low noise floor allows the TOPPING A50s to deliver a performance unmatched by any other headphone amplifier regardless of its topology.

6.35mm SE & Balanced 4.4mm Outputs

Despite having only single-ended RCA inputs, the TOPPING A50s headphone amplifier’s internal circuitry is internally balanced. The front panel features a 6.35-millimeter single-ended output and a 4.4 -millimeter balanced output.

The balanced 4.4mm output of the A50s provides the benefits of balanced headphone output, such as higher power output, high voltage swing, and avoiding any mains noise. Thus, A50s can separately power single-ended headphones through the 6.35mm SE output and balanced headphones via the 4.4mm balanced output.

High-Performance Amplifier & Preamplifier

Besides being a headphone amplifier, the A50s is also a state-of-the-art preamplifier. A pair of single-ended RCA output on the rear panel provides a preamp output connection to a power amplifier or powered speakers, delivering superb performance.

The volume knob on the front panel adjusts the volume of the RCA preamp outputs. The low output impedance of 20 ohms ensures smooth integration with many devices.

Automatic Switching between Amp & Preamp

Unplugging the connected headphones will activate the analog preamp mode of the A50s. Preamp mode switches off the headphone amplifier section of the A50s. Plugging the headphones back in starts the headphone amplifier section deactivates the preamp section, allowing the A50s to allow the A50s to function as a pure headphone amplifier.

Dual Selectable Gain Settings

The gain levels of the A50s allow for easy switching between 0dB/6dB (single-ended) and 6dB/12dB (balanced) using the power/gain switch button on the front panel. The dual gain settings and headphone outputs give users the ability to adjust the headphone amplifier according to their listening preferences.

The noise level for single-ended output is 0.3uVrms and 0.4uVrms in low and high gain, respectively. At all gain settings, the noise floor and dynamic range of the A50s are miles ahead of the competition on all outputs and gain settings.

Power Output @ 2Vrms & Maximum Power Output

A50s will deliver up to 3.5W of power into 32 ohms & 760mW in 300 ohm loads on its 4.4mm balanced output with both channels driven. When using a source that provides a signal level of 2Vrms, the A50s will output 1950mW into 32 ohms and 208mW into 300 ohms.

Near-Zero-Ohm output impedance

The near 0-Ohm output impedance of the A50s produces a high damping factor that minimizes frequency-based reactive-load impedance shifts and ensures a predictable frequency response. The high damping factor ensures adequate control over the connected headphone's drivers, allowing for powerful bass and accurate sound reproduction.

What‘s in the box:

  • 1 × A50s Headphone amplifier and preamp
  • 1 × 15V DC adapter
  • 1 × 6.35mm to 3.5mm adapter
  • 1 × User manual
  • 1 × Warranty card

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 80499832841

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Joe
Draper, US
★★★★★ 1
Do not buy these
Color: Nude, Size: Women 9-13
These are terrible. They are designed to walk in. The first day I tried them on I walked about 20 steps and they basically ripped right off my feet. I didn’t think much of it and just thought ok I won’t walk in them I’ll just wear them to bed. The second pair that came with the order I wore to bed that night and woke up with holes tore in them. Terrible product
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Reviewed in the United States on March 22, 2026
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Verified Purchase
Kevin
Dallas, US
★★★★★ 5
Durable
Color: Nude, Size: Women 9-13
These are form-fitting and durable. Wearing these keeps the skin moisturizer in place so it can be effective.
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Reviewed in the United States on January 14, 2026
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KN
Pawtucket, US
★★★★★ 5
Great Results
Color: White, Size: Women 9-13, Color: White, Size: Women 9-13
The Jfrhuds Moisturizing Silicone Socks work very well. I ordered the white 2-pack in the large size 9-13, and each came packaged in an individual zipper bag.  I wear a women's size 9-9.5, and they fit me perfectly.  I can see how they have enough stretch to fit larger sizes easily and comfortably. These socks are a lot thicker and heavier than I expected.  They are rubbery with non-slip treads on the bottom.  As soon as I put them on my feet, they actually felt very moisturizing and almost wet, even though I had not put moisturizer on my feet first.  Plus my feet felt cold at first. It was different than I expected, I had never worn this type of sock before, and it was an interesting sensation. They work great, and I am sold on the benefits of these socks.  I wear them to sleep at night and dodn't walk very far in them.  They seem pretty sturdy, but I don't want to push it and will just use them for their intended purpose.  My feet weren't super dry or cracked, but the socks really helped revive them and make them super soft again.  I love them; they are great for self-care and would also make a wonderful gift. 
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Reviewed in the United States on April 20, 2026
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Verified Purchase
Michael S. Johnson
Massapequa, US
★★★★★ 1
Not durable
Color: Nude, Size: Women 9-13
Only used two of them so far. One sock lasted nearly 3 wears. The other broke before I could finish wearing it the second time. Basically useless junk.
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Reviewed in the United States on April 2, 2026
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annette rainville
Fort Morgan, US
★★★★★ 4
Thick Silicone Moisturizing Socks
Color: Nude, Size: Women 9-13, Color: Nude, Size: Women 9-13
★★★★☆ Thick Silicone Moisturizing Socks I ordered these silicone moisturizing socks to try for dry heels. Unlike typical fabric spa socks, these are made entirely of soft silicone and are noticeably thicker and very stretchy. When I first took them out of the package there was a visible fold line in the silicone. It appears to be from how they were folded in the packaging rather than a defect in the material. The silicone itself feels durable and flexible. The design works like a full silicone sleeve that traps moisturizer against your skin. I applied Aquaphor first and then slid these on so the moisture stays in contact with the skin longer. One thing I noticed right away is that the silicone feels cool when you first put them on, which is actually pretty comfortable. The bottoms have a zig-zag textured pattern that gives some grip if you need to stand briefly, though these seem better for relaxing while moisturizer absorbs rather than walking around much. The ankle opening is the tightest part of the sock. It stretches, but it’s noticeably snug compared to the rest of the silicone, which helps keep them from sliding off. For sizing reference, I wear a women’s 7.5–8 shoe and the size Large fits comfortably. There’s plenty of stretch and I can wiggle my toes easily, so they should accommodate larger feet as well. They’re also easy to clean. After using them you can simply wash them with soap and water and let them dry completely before storing or using them again. Overall these appear well made with thick silicone and plenty of stretch. If you use moisturizing socks or heel treatments, these work well for keeping lotion in place while your feet absorb it. Since this set comes with two pairs for about $10, the price seems pretty reasonable for something reusable like this.
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Reviewed in the United States on March 6, 2026

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