Topping - A90 Discrete

Desktop Headphone Amplifier + Pre-Amp

Sale price₹ 56,999 Regular priceMRP: ₹ 59,999

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7 Day Replacement Guarantee

In case you receive the Topping - A90 Discrete with a manufacturing defect, please raise a return request within 7 days of delivery.

However, if you receive an incorrect / damaged / different product or one with missing accessories, please raise a return request within 24 hours of delivery. In case you receive a product with a missing, incorrect, or faulty accessory, you will be given a replacement accessory instead of the entire product.

Please make sure that the product is in the original packaging with all the accessories it came with. We'll also need an unboxing video and images of the parcel to investigate about the discrepancy. You may be asked to share images of the product and the packaging received for us to determine the damage or defect prior to approving the return request. The free replacement will be shipped only once the original order is returned.

A replacement will be issued only if:

- It is found to be defective
- It is determined that the product was not damaged while in your possession
- The product is not different from what was shipped to you
- The product is returned in original condition (with brand’s/manufacturer's box, MRP tag intact, user manual, warranty card and all the accessories therein)


Warranty & Services

Don't sweat it, this Topping - A90 Discrete comes with a 1 Year 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.

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Why Topping is Special


Designed in China

Established & Reputed

Trust us, our reputation in the audio world speaks for itself!

This headphone or gear comes from a well-respected brand known for its high-quality audio equipment, so you can be confident in your purchase.

If you see a product marked as “🎖️ Established & Reputed”, it means you're getting a top-tier device from a brand that's earned its stripes in the audio industry.

Revered by Audiophiles

Audiophiles can be really picky and tough to impress and if the audiophile community says something sounds good, you can bet it's great!

This headphone or gear has gained recognition and admiration from audiophiles, who are known for their discerning taste in high-fidelity audio. They appreciate its precision, attention to detail and its ability to deliver an immersive sonic experience.

If you see a product marked as "🙌🏻 Revered by Audiophiles", it means that it meets the highest standards of sound quality and performance, making it a top choice for anyone who values exceptional audio experiences.


A masterpiece from the experts who know audio inside and out!

This headphone or gear is crafted by specialists who know their stuff, ensuring every detail is perfect.

If you see a product marked as “🌟 Specialist”, it means you're choosing a device designed by experts who specialize in creating this specific category of device.

Why we love this DAC/Amp

Premium Economy

Sensible spending and class above in quality. 

This headphone or gear offers top-notch sound and performance without much impact on your pocket, promising a delightful experience that exceeds your expectations at an economical price point.

If you see a product marked as “💎 Premium Economy," it indicates that you're getting a high-quality audio product with exceptional sound clarity and reliable performance, all at a budget-friendly price.

Serious Audiophiles Only

Diving deeper into exploring the hobby is never enough.

If you're an audiophile on a hunt for a device that meets your high standards, this is one such headphone or gear designed for discerning audiophiles like you in mind.

If you see a product marked with “🦈 Serious Audiophiles Only" we assure you that this device can match your depth of knowledge and expertise to take your passion for audio to the next level.

Cult Following

Cause some things just demand the dedication.

This headphone or gear has a dedicated fanbase, adored by those in the know and praised for its audio quality.

If you see products marked as “🧑🏼‍🤝‍🧑🏼 Cult Following”, you’re about to join an exclusive club of enthusiasts who swear by its awesomeness, enjoying a product that stands out from the crowd and never fails to impress!

Our Team's Favourite

Cause after all, we are audiophiles first!

This headphone or gear has won the hearts of our team, standing out as a top pick among our gurus.

If you see products marked as “💙 Our Team’s Favourite”, you're choosing a product that’s been tested, loved, and enthusiastically recommended by our team, giving you confidence that it’s a standout choice!

For Audiophiles at Home

Cause music hit differently when you are in your own space.

This headphone or gear is perfect for those who demand exceptional sound quality in their personal sanctuary.

If you see products marked as “🏠 For Audiophiles at Home”, get ready to transform your living space into an audiophile's paradise, with rich, immersive sound that makes every listening session a masterpiece.

Connect With Cable

This device comes with multiple connectivity options. Be sure to check if your source and output support these input and output options.

Why it Sounds Amazing

Power Output

When you need that juice to get the best out of your products.

This headphone or gear packs a punch, revealing the product's impressive power output capabilities, ensuring it can handle even the most demanding products with ease.

If you see products marked as “🚀 Power Output”, you're in for a treat with robust performance for driving high-fidelity products without breaking a sweat.

Balanced Output

Upgrading from single-ended to balanced can be the easiest way to improve your sound.

This DAC, Amp or Hi-Res player offers a balanced output, ensuring pristine audio quality with minimised interference and enhanced clarity for your listening pleasure.

If you see a product marked as "⚖️ Balanced Output”, get ready for a symphony of crystal-clear tunes, free from any unwanted noise drama!

The Topping A90 Discrete is an upgraded version of the groundbreaking A90. As its name suggests, the A90 Discreet uses fully discrete components to deliver tremendously clean and powerful output. It has quickly become the benchmark by which all other solid-state amplifiers are referenced.


Raghav Somani is the Founder & CEO of Headphone Zone. An avid audiophile and musician since 2008, his choice of headphones include STAX Electrostats, Audeze LCD 3, and for music on the go, the JH Audio Roxanne + Astell&Kern SP1000 is never too far away. On his playlist, you'll find A.R. Rahman, Michael Jackson, and the Eagles.


Topping is known to make the quietest and most linear power amplifiers. The design engineers at Topping develop the amplifiers with precision delivering out-of-the-box audio performance. The concept and products of Topping have won the recognition of audiophiles worldwide. Since Topping first unveiled the A90 in 2020, audiophiles went berserk. The A90 Discrete is no different from the great products that Topping consistently offers with comprehensive, high-performance features. The Topping A90 Discrete is a fully balanced headphone amplifier that can also act as a pre-amplifier. The design overhaul on the A90 Discrete compliments the output power handling capacity. You will be able to drive high impedance and low sensitivity headphones/IEMs with ease. The differences over the classic A90 are that the A90D incorporates the Discrete Nested Feedback Composite Amplifier with a THD+N of <0.000055% as compared to <0.00006% on the classic A90. The Topping A90 Discrete also has higher output power ratings and an R2R relay volume control that reduces channel imbalance delivering optimum performance.

Headphone-Zone-TOPPING-A90 Discrete


Packing an ultimate performance with fully-discrete NFCA modules, the all-new Topping A90 Discrete headphone amplifier is here. As its name, A90 Discrete uses fully discrete components to redesign the NFCA module. A fully balanced architecture is achieved on the A90 Discrete with four built-in NFCA (Nested Feedback Composite Amplifier) Discrete modules, each using 39 transistors. Excellent DC and AC performance is delivered; by the improved Voltage Current hybrid feedback architecture in conjunction with UHGF (Ultra High Gain Feedback) technology. The Topping A90 Discrete can drive high impedance and low sensitivity headphones/IEMs because of the new design's better output capacity. Unparalleled distortion-free, and noise-free performance, are ensured by the paralleled ultra-low noise precision-matched transistors used in the design. The background of the Topping A90 Discrete is incredibly silent and dark, and the sound is quite natural as it can be. It has a very accurate, crisp bass response and a smooth top end. With this amplifier, the midrange comes through clearly and smoothly, allowing you to hear how a recording sounds. Experience music like never before and delve into pure sonic bliss with the all-new A90 Discrete.

Headphone-Zone-TOPPING-A90 Discrete

Headphone-Zone-TOPPING-A90 Discrete


The engineers at Topping set out to create a powerful amplifier without distortion, typically associated with high power. A90 Discrete underwent numerous tests and prototypes to become the most reliable and effective headphone amplifier. The Topping A90 Discrete promises to deliver spectacular performance with low distortion while outputting high power. High output current and low output impedance will not have any unneeded consequences when driving low-impedance headphones. The high output voltage and current can readily drive high impedance headphones. The A90 Discrete can power a variety of headphones. In addition to the high output power, the A90 Discrete can maintain ultra-low distortion output power under a high power load. The A90 Discrete provides you with 1 x XLR and 1 x RCA stereo inputs, but when it works with an Ext90, they could enable a total of 4 x XLR and 2 x RCA stereo inputs. The 12V Trigger interface on the A90 Discrete can be configured for active control (Trigger out) or passive control (Trigger in). With only one easy-to-obtain 3.5mm to 3.5mm cable, the A90 Discrete can be turned on and off synchronously with other devices equipped with a 12V Trigger interface. With this setup, you can connect A90 Discrete to Topping U90 Professional Grade USB Audio Bridge, and you can form your desktop audio chain.

Headphone-Zone-TOPPING-A90 Discrete
Headphone-Zone-TOPPING-A90 Discrete


The Topping A90 Discrete is not only able to drive the headphones but also serves as a preamp. When it is in preamp mode, you can get the same high performance as the headphone amp mode, and the 20 ohms SE and 40 ohms balanced output impedance are widely suitable for various power amplifiers. A90 Discrete can not only switch between the headphone amp (only output from the headphone jack) and the preamp (only output from RCA and XLR) but also support the output from all simultaneously. The full-featured remote control makes it more convenient for you to use. You can control various operations like Standby, Volume up, Switch to previous, input, Output channel switching, User setting, Headphone amp gain, Mute, OK button, Switch to next, input Volume down, User setting, and Brightness settings. The output volume or the input volume of an A90 Discrete can be programmed to be stored. When the output volume is stored, the A90 Discrete will immediately return to the previously used level when the same output is selected again. This design applies to the PRE (Pre-Amplifier), HPA (Headphone Amplifier), and PRE+HPA modes. When the input volume is stored, the A90 Discrete will remember the volume settings for each input separately and will automatically return to the previous volume setting the next time the same is selected.

NOTE: Press and hold the C1/C2 button for 3 seconds to save the current program (including input channel, output channel, volume and brightness), and "C1" or "C2" will be displayed after successfully saving. Short press the C1/C2 button to use the corresponding program.

Headphone-Zone-TOPPING-A90 Discrete
Headphone-Zone-TOPPING-A90 Discrete
Headphone-Zone-TOPPING-A90 Discrete


The Topping A90 Discrete is a versatile balanced amplifier that not only power high impedance headphones but are super clean while powering low and high-sensitivity IEMs. This delivery of clean output power was possible as the A90 Discrete is a complete design overhaul that includes two-step gain settings. The A90 Discrete has two gain options, which are enough to cover a wide variety of headphones: low gain to drive the IEMs with high sensitivity and high to drive full-sized over-ear headphones. Combined with the 0.2uVrms ultra-low noise, even sensitive IEMs will not suffer from any noise. On balanced ports, the output power is 6db on low gain and 15.5dB on high. The output power through single-ended is 0dB on low and 9.5dB on high. The classic Topping A90 used a standard volume potentiometer. These often suffer from channel imbalance at low volumes, which makes listening to sensitive IEMs tough. To overcome this issue, Topping introduced a low gain setting on the A90 Discrete with an R2R volume controller, allowing you to set the volume knob for dialling in a suitable volume that doesn’t result in channel imbalance. These offer massive advantages over standard potentiometers, like outstanding THD+N, SNR, and well-balanced channels. A90 Discrete uses an R2R volume control composed of relays and resistor networks, bringing advantages of precise control, longevity, complete channel balanced and remote control. According to the customised settings volume can be set for the A90 Discrete to avoid a sudden loud burst after the power on/input switch. Ground loop noise may be encountered when multiple devices are powered in combination. A90 Discrete adds a Ground Loop Noise Terminator Switch (GLNTS) GND/LIFT to solve this problem. When in normal use, set it to GND and when ground loop noise is encountered, switch it to LIFT to eliminate ground loop noise.

Headphone-Zone-TOPPING-A90 Discrete
Headphone-Zone-TOPPING-A90 Discrete
Headphone-Zone-TOPPING-A90 Discrete
Headphone-Zone-TOPPING-A90 Discrete


Topping has always strived to push the frontiers by developing products that combine stunning design and build quality. The Topping A90 Discrete comes with a remote, 6.35mm to 3.5mm adapter, AC cable, warranty card, and a user manual to get you started. It features numerous inputs and outputs for easy compatibility and connectivity. It includes a 4-pin XLR (External Line Return) balanced and a 4.4mm balanced headphone output jacks. It also features a single-ended 6.35mm headphone output jack which makes A90 Discrete compatible with most headphone terminations. The A90 Discrete includes single-ended RCA input and single-ended RCA output with balanced XLR input and XLR outputs.

Headphone-Zone-TOPPING-A90 Discrete
Headphone-Zone-TOPPING-A90 Discrete
Headphone-Zone-TOPPING-A90 Discrete
1 Year Warranty

Don't sweat it, this Topping - A90 Discrete comes with a 1 Year 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.

The Audiophile's Choice For Precision and Accuracy

TOPPING, founded in 2008 and headquartered in Guangzhou, China, is dedicated to creating immersive Hi-Fi experiences with superior performance. Emphasizing research and development (R&D), TOPPING invests in a dedicated department of senior engineers and audiophiles, employing professional audio instruments like the premium audio testers APx555 and APx555B from Audio Precision. Each product undergoes rigorous testing to ensure exceptional parameters and performance, followed by meticulous adjustments for optimal sound quality.

Renowned worldwide, TOPPING's lineup includes products like the A90, D90, A70, and D70 with their DACs and amps being favourites among audiophiles globally. Committed to pushing the boundaries of quality, TOPPING remains true to its mission of delivering unparalleled Hi-Fi experiences.

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