TOPPING
TOPPING - A50s
Desktop Headphone Amplifier
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24 Hours
Delivery
Chi-Fi
Excellence
Ideal for
Indoor Use
4.4mm
Balanced Output
Connect With
RCA
Upto 3500mW X 2 @32Ω
Power Output
Topping A50s is a proficient solid-state headphone amplifier. It is neutral and balanced, fast, detailed, clean and transparent. Most importantly, the A50s is powerful and can drive the most demanding headphones.
PAIRS WELL WITH THESE ACCESSORIES
FROM HEADPHONES TO IEMS THE PRO-PERFORMANCE TOPPING A50S CAN DRIVE ALMOST ANYTHING
NFCA (Nested Feedback Composite Amplifier) modules from the TOPPING A90 is used in the all-new TOPPING A50s as well. These nested-composite amplifier modules extend the bandwidth at high gain, increase slew rates, and reduce distortion. Experience the best DC and AC performance with the Voltage Current hybrid feedback architecture and UHGF (Ultra High Gain Feedback). The A50s offers a high output current that can drive even low impedance headphones with absolute ease. With noise as low as 0.3uV, the dynamic range is as high as 144dB that too with no audible noise. You can use the TOPPING A50s with speakers too.
A METICULOUSLY DESIGNED HEAT-REDUCING ALUMINIUM CASE
The A50s comes with a meticulously crafted aluminium case. Its outer casing consists of an aluminium brick which is flawlessly designed with CNC precision machining. The power supply usually produces a lot of heat and to get rid of it, the outer casing comes with a thermal conductive column. This column effectively dissipates heat from the power supply and the OP-AMP.
DRIVE A WIDE RANGE OF HEADPHONES WITH SINGLE ENDED AND BALANCED OUTPUTS
When both channels of the TOPPING A50s are driven, it has a high voltage swing of 42Vp-p and 3500 mW of power per channel. The output impedance stays below 0.10 ohms. You can drive power-hungry headphones with different impedance using the A50s. Even though you get only a single-ended input with the TOPPING A50s, it has a fully balanced amp circuit. This allows you to use the A50s to drive single-ended headphones through a 6.35 mm output and balanced headphones with a 4.4mm balanced output.
2 STEP GAIN SETTINGS TO SUPPORT ALMOST ALL TYPES OF HEADPHONES
Engineered with 2-step gain settings, the TOPPING A50s offers 0dB/6dB using the single-ended output and 6dB/12dB using the balanced output. This wide range of gain settings help you to pair the TOPPING A50s with almost all types of headphones. You can use the 50s with power-hungry over-ear headphones as well as with the most sensitive in-ear monitors.
DOUBLES UP AS A PREAMP WITH SAME ULTRA HIGH PERFORMANCE
The best part of NFCA (Nested Feedback Composite Amplifier) modules is that they don’t just help the A50s to drive the headphones but also to act as a preamp while delivering the same level of ultra-high performance. When you are using the A50s as a preamp, the output impedance remains as low as 20 Ohms enabling the A50s to be paired with various devices.
EASY HPA/PRE AUTOMATIC SWITCHING TO SHIFT FROM PREAMP TO HEADPHONE AMP MODE
When not connected to the headphones, the TOPPING A50s works in the preamp mode and the RCA on the back panel acts as the output for the amplified signal. The A50s automatically switches to headphone amp mode when you connect it to headphones through 6.35mm output or the 4.4mm output. Under the headphone amp mode, the 6.35mm and the 4.4mm are the output for signals.
| THD+N @1 kHz A-WT | <0.00007% @Output=850 mW(32Ω) <0.00006% @Output=90 mW(300Ω) |
| THD ©20-20 kHz 90 kBW | <0.0004% @Output=720 mW(32Ω) <0.0002% @Output=77mW(300Ω) |
| SNR @MAX OUT 1 kHz A-WT | 137dB |
| DYNAMIC RANGE @1 kHz A-WT | 138dB |
| FREQUENCY RESPONSE | 20 Hz-200kHz(±0.05dB) |
| OUTPUT LEVEL | 21Vpp |
| AP MEASURED NOISE LEVEL @A-WT | <0.7uVrms @G=L <0.8uVrms @G=H |
| ACTUAL NOISE LEVEL* @A-WT | <0.3uVrms @G=L <0.45uVrms @G=H |
| CHANNEL CROSSTALK @1 kHz | -86dB |
| IMD CCIF@(18 kHz + 19KHZ) | -116dB |
| IMD SMPTE @(60HZ + 7KHZ) | -110dB, SMPTE4: 1 -118dB, SMPTE1: 1 |
| INPUT SENSITIVITY | 7.5Vrms @G=0dB 3.8Vrms @G=6dB |
| GAIN | 0.0dB @G=0dB 6.0dB @G=6dB |
| OUTPUT IMPEDANCE | <0.1Ω |
| OUTPUT POWER THD+N<1% | 1.4W x 2 @32Ω 192mW x 2 @300Ω |
| OUTPUT POWER@2VRMS IN | 1.4W x 2 @32Ω 192mW x 2 @300Ω |
| LOAD IMPEDANCE | >8Ω |
| THD+N @1 kHz A-WT | <0.00007% @Output=3.4W(32Ω) <0.00006% @Output=367mW(300Ω) |
| THD ©20-20 kHz 90 kBW | <0.001% @Output=2.88W(32Ω) <0.0005% @Output=307mVV(300Ω) |
| SNR @MAX OUT 1 kHz A-WT | 143dB |
| DYNAMIC RANGE @1 kHz A-WT | 144dB |
| FREQUENCY RESPONSE | 20 Hz-200kHz(±0.05dB) |
| OUTPUT LEVEL | 42Vpp |
| AP MEASURED NOISE LEVEL @A-WT | <0.9uVrms @G=L <1.1uVrms @G=H |
| ACTUAL NOISE LEVEL* @A-WT | <0.6uVrms @G=L <0.95uVrms @G=H |
| CHANNEL CROSSTALK @1 kHz | -128dB |
| IMD CCIF@(18 kHz + 19KHZ) | -116dB |
| IMD SMPTE @(60HZ + 7KHZ) | -110dB, SMPTE4: 1 -118dB, SMPTE1: 1 |
| INPUT SENSITIVITY | 7.5Vrms @G=0dB 3.8Vrms @G=6dB |
| GAIN | 6.0dB @G=0dB 12.0dB @G=6dB |
| OUTPUT IMPEDANCE | <0.2Ω |
| OUTPUT POWER THD+N<1% | 3.5W x 2 @32Ω 760 mW x 2 @300Ω |
| OUTPUT POWER@2VRMS IN | 1950 mW x 2 @32Ω 208mW x 2 @300Ω |
| LOAD IMPEDANCE | >8Ω |
| BOX CONTENTS | 1. TOPPING A50s |
| 2. 15V DC Adapter | |
| 3. 6.35 mm to 3.5 mm adapter | |
| 4. User manual | |
| 5. Warranty Card |
| GENERIC NAME | Headphone Amplifier |
| COUNTRY OF ORIGIN | China |
| IMPORTER DETAILS | Importers Name: Ferrari Video Address: 63/18, 1st Main Road, Gandhi Nagar, Chennai - 600020 Contact No: 044-24420733 |
| NET QUANTITY | 1 |
1.4W X 2 @32Ω
192mW X 2 @300Ω
OUTPUT POWER@2VRMS IN:
1.4W X 2 @32Ω
192mW X 2 @300Ω
Balanced:
3.5W X 2 @32Ω
760 mW X 2 @300Ω
OUTPUT POWER@2VRMS IN:
1950 MW X 2 @32Ω
208mW X 2 @300Ω
1 Year Warranty
Don't sweat it, this TOPPING - A50s comes with a warranty
from TOPPING that covers manufacturing defects.
All products featured on Headphone Zone are backed by an original manufacturer's warranty.
Read more about TOPPING's warranty in India.
"A50S, it is really impressive when it comes to technicalities as speed, decay, details, transparency and frequency response. It definitely performs like an NFCA Amp."
Read MoreCustomer Reviews
Bought it after rave reviews and very precise measurements but it busted some myths for me:
1. Music is very subjective. We have not been able to measure musicality quotient as yet!
2. Precise measurements doesn't guarantee great music!
Coming to this Amp. It has good amount of power at disposal. Can easily drive Sundara and DT990 pro 250. However, it definitely is not transparent (even though many youtuber audiophiles may say)! It changes sound. It makes it rounder or smoother.. taking the musicality out of the songs!
Considering it to be perfect and above suspicion, I rather doubted my Sundaras (even with costly 4.4 mm cable replacement) and kept them aside for not being good enough! Then as part of best sound exploration drive, tested some IEMs, that were sounding good on galaxy s9 + hidizs s8 but did not sound that well on pc (usb)-> s8 -> A50s. Assuming IEMs are not to be driven with amp, connected directly to s8 .. and the sound changed! The music was very much there without A50s! After some more trials with different combinations of gears and interconnects; and after Sundaras sounded great with ifi hip dac 4.4 balanced, found A50s to be culprit in whole chain.
Currently enjoying with pc-> Lotu Paw S1 (small but amazing dac amp) -> Sundara!
I purchased this amp to drive my Drop 6XX headphones which are on their way. In the meantime, I tried this amp plugged into a Fiio E07K Andes serving as a DAC connected to my 2015 macbook pro using the 3.5 mm jack. I plugged my Drop Panda heaphones using the 3.5 mm to 6.25 mm convertor that came with the amplifier. The soundstage was wide and the sound had a slightly warmer quality compared to listening to music wirelessly using the Panda's built in THX AAA DAC/Amp connected wirelessly. Still waiting to see if the amp can drive my Drop HD 6XX with enough power. But so far a Happy Camper.
Headphone zone buying experience (first time customer) was extremely good. I was undecided between a iFiV2 as a DAC/amp and the A50s as a more powerful amp. The conversation with a headphone guru helped clear this confusion. Thanks headphone zone for serving the Indian community.
My earlier unsatisfactory review gets updated with this one. Earlier the issue was with my interconnect cables. Those were supposed to be good quality but were not "audiophile" quality! Changed them to audiophile grade RCA cables and not A50s really shines. Most of the time I am able to hear directly from RME dac but when balanced out is required, have connected RME to A50s using RCA cables, and use A50s 4.4 balanced out. Thinking of upgrading to A90 for some time to get proper balanced out but so far have been going good with A50s only. Except for lack of balanced XLR in's, power wise have never felt them lacking .. even with Arya.
Hey Vijay,
We are glad you had a comfortable shopping experience with us & it is delightful to read such positive reviews on your product! Cheers & Welcome to the club!
[Don't know if, or how to, edit my earlier review, so submitting a new one]
Need to update this thread. A50s is turning out real good now. The culprits came out to be my two (3.5 mm to RCA) cables (!).
Cables do make quite a difference!
Seems my two cables were good quality but not "audio good" quality! Changed them to audio grade quality cables and A50s is sounding a lot lot better now! Though it still does not sound transparent but still a lot-lot better now .. so much better that am thinking if to go for A90 for XLR balanced in to match with my RME dac. Currently I use A50s with RME to get 4.4 mm balance out.
With those "non audio grade", having gold plated interconnects, cables, the music sounded hollow, as if coming through a hollow pipe. Also sharpness in vocals were rounded off .. it made them smoother. Now that its working very well, I can say these are really five stars worth and a great VFM!
Hey Vijay,
We are glad you had a comfortable shopping experience with us & it is delightful to read such positive reviews on your product! Cheers & Welcome to the club!
My earlier unsatisfactory review gets updated with this one. Earlier the issue was with my interconnect cables. Those were supposed to be good quality but were not "audiophile" quality! Changed them to audiophile grade RCA cables and not A50s really shines. Most of the time I am able to hear directly from RME dac but when balanced out is required, have connected RME to A50s using RCA cables, and use A50s 4.4 balanced out. Thinking of upgrading to A90 for some time to get proper balanced out but so far have been going good with A50s only. Except for lack of balanced XLR in's, power wise have never felt them lacking .. even with Arya.
Hey Vijay,
We are glad you had a comfortable shopping experience with us & it is delightful to read such positive reviews on your product! Cheers & Welcome to the club!