SKU: 80499832841

TOPPING A50S Balanced Headphone Amplifier AMP Preamplifier

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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

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SKU: 80499832841

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SHOUKET FAREED
Houston, US
★★★★★ 5
Very good knowledge
Format: Paperback
Details about the subject
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 31, 2023
C
C. C Chin
Chelsea, US
★★★★★ 5
Great ex294 exam book
Format: Paperback
Got his Rhel 8, Kindle Rhel 9, need background check 5,6 for Ansible playbook add users to Rhel sever project.. Perfect for review, also build Rhel sandbox using Oracle virtual Box to simulate sandbox.. His exams are a nice touch each task refers back to chapters so you can really learn. Chapter one is build Rhel 9 sandbox to practice the chapters for the real exam. If you want to take ex294, or most Redhat exams, they are pbq, performance based questions, so you have no choice but to practice.. Guess for me chap 1, Rhel 9 lab sand box and ch 5,6 adding users and practice adding users!! Then start doing Redhat Ansible playbook to add users!!
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Reviewed in the United States on February 27, 2025
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Marc Jenkins
Draper, US
★★★★★ 4
Good book minus Containers chapter.
Format: Paperback
Great book with useful information. However, I gave it 4 starts due to the "Containers" chapter. Very poorly written chapter. In fact, if you get this book, just ignore the container chapter as it will only waste your time and can be better spent using other sources.
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Reviewed in the United States on May 6, 2025
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Jean P.
Port Orchard, US
★★★★★ 4
Portable format
Format: Paperback
It is a good book , the only inconvenient some links provided did not work and it doesn’t have a portable format available online
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Reviewed in the United States on April 9, 2025
T
tommy the runion
San Leandro, US
★★★★★ 4
Good book that will help with your RHCSA, But...
Format: Kindle
...watch out for typos and problems with some of the explanations in some parts of the book. I bought this book (kindle version) and used it to pass the RHCSA. The book is clearly tailored for the RHCSA and to be fair does live up to that reputation. There are a lot of exercises and examples that clearly outline what the author is trying to convey. Examples are clear to understand and if you do the exercises yourself, then you are well on your way to passing the RHCSA. However, there are a lot of typos big and small and I did send them to the author with the assumption that it would benefit others with the corrections (especially the kindle version). The author was responsive at the beginning acknowledging the errors. I did not check whether they have been fixed or not. I just went through the content after making note of the typos and with the understanding that he would fix it. The topics are well covered and explained. Three topics that could have been better covered are SELinux, AutoFS and Containers. The explanation uses excessive word-o-logy that leaves somebody new to SELinux with tons of confusion and more questions. I used youtube resources to prep myself on the how and why (Ed Walsh on a youtube channel clearly explains the need for SELinux - I have not seen a better explanation than Ed's anywhere else). The author's coverage of AutoFS is again excessive word-o-logy that is a confusing mess. The examples are fine, but the explanation uses confusing rhetoric that can leave you messed up with NFS and AutoFS setup. I read explanations on direct and indirect mappings and watched a couple of youtube videos before I understood what the author was trying to convey. I pointed out both of these to the author. The container chapter is missing explanations or examples that the reader is well advised to take note. DIY labs 22-3 and 22-4 relate to rootless containers and therefore has to be launched as a regular user. Both labs require that you launch rootless, persistent data containers with folders under /. However, the author does not mention in any of his examples that this type of container requires you to "chown" the folders under root to belong to the user. If you launch a rootless container with this setup as a regular user without "chown"ing, (even with full DAC permissions for everybody) then SELinux does not want to apply the correct context type (container_t to the shared folder). For both these DIYs, if you make a folder anywhere other than areas that a regular user can write or has access, then you will need to "chown" it to the user before launching the rootless container, otherwise this has to be launched as a root container not rootless. I pointed this out to the author. I did not hear from him. Further, container questions (20,21,22) in mock exam #3 has user60 with a NFS mounted home folder. The questions relate to launching rootless containers as user60 with a NFS mounted home folder. SELinux barfs when it encounters the home folder with a type context as "nfs_t" for user60. It suggests workarounds that did not work for me. I googled it and the latest versions of podman seem to have some fix for the errors associated with a home folder on a NFS server. I tried to research this issue further but had an exam scheduled within days. Therefore, I requested the author for clarification/help. Here again, I did not hear from him. Luckily, I did not have to work on any such scenarios on the real test. Still, the book is a good reference to the topics on the test and is pretty useful. Although I had to refer to other resources for some chapters, the examples and mock exams are very good.
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Reviewed in the United States on June 12, 2023

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