Topping - A90 Discrete

Desktop Headphone Amplifier + Pre-Amp

Sale price₹ 59,999
GET 18% GST INPUT

One of the reasons headphones and earphones in India are more expensive than overseas is because of the Goods & Services Tax in India.

Don't let the GST input go to waste especially if you can avail an offset.

All products sold on Headphone Zone carry a GST compliant invoice and all products sold include an 18% GST.

Simply enter your GST number at the time of checkout.

Browse EMI Plans

Low Cost EMI Options through Credit Cards


Other EMI Options through Credit Cards

Talk to a Headphone Guru
DELIVERY
Dispatches in
What does "ships within 24/48 hours" mean?

In a nutshell, ships within 24/48 hours basically means that your product will be shipped out or dispatched from our warehouse within 24/48 hours after placing the order. It also indicates that the products are readily available at our warehouse and once we receive your order, we dispatch it out at the earliest either on the same day or the next working day depending on when you’ve placed your order.


What it does not mean:

A lot of our customers assume that it means their order will get delivered to them within 24/48 hours, but that’s not what it means. For an order to reach you, it can take anywhere up to 3-4 business days, depending on which part of India you are placing an order from.

For an accurate timeline, you can enter your pin code on the product page and check for an estimated date of arrival.

Delivery By:

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)

READ MORE

Warranty & Services

Don't sweat it, this Topping - A90 Discrete comes with a 1 Year warranty on the Amp/DAC and 6 months on the battery 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.

Club Audiophile

Join Club Audiophile to begin your pursuit of great sound. Earn points and save on every purchase.

READ MORE

Why Topping is Special

🇨🇳

Designed in China

Established & Reputed

Trust us, our reputation speaks for itself 🏆!


I believe that when a brand has decades of proven excellence, you can invest with confidence knowing your purchase is backed by years of audio engineering expertise. These products come from manufacturers with extensive histories of innovation and unwavering commitment to sonic excellence. Think of them like luxury watch brands - their reputation has been earned through decades of consistent quality and innovation.


With their extensive history of innovation and countless satisfied customers worldwide, you can be confident your investment is backed by proven audio engineering expertise and industry leadership 📈.


When you see "🎖️ Established & Reputed" products, expect time-tested excellence from manufacturers who've consistently demonstrated mastery in audio engineering for generations.

Revered by Audiophiles

Audiophiles can be really picky 😤, and if the audiophile community says something sounds good, you can bet it's exceptional! I believe that earning audiophile reverence is like getting a standing ovation from music critics - it doesn't happen unless you've truly achieved something special. This audio gear has earned widespread acclaim from audiophiles worldwide, a community renowned for exacting standards and unwavering commitment to high-fidelity reproduction.


These discerning enthusiasts particularly value its extraordinary precision in sound reproduction and remarkable capability to create thoroughly immersive listening experiences. The audiophile community's endorsement carries significant weight because of their extensive experience with high-end equipment 🏆.


When you see "🙌🏻 Revered by Audiophiles" products, expect audiophile-grade excellence that satisfies even the most demanding listeners and consistently exceeds the highest standards.

Specialist

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


I tend to describe specialist manufacturers as "audio artisans" who focus exclusively on perfecting specific categories of equipment. These products are meticulously crafted by dedicated experts who possess deep knowledge of sound reproduction, ensuring every technical aspect is refined to perfection. Think of them like master craftsmen who spend their entire careers perfecting one specific skill - their focused expertise shows in every detail.


These dedicated experts bring years of specialised knowledge to the design process, resulting in products that consistently achieve exceptional performance standards through focused engineering excellence 🎯.


When you see "🌟 Specialist" products, expect focused expertise from manufacturers who dedicate their entire efforts to perfecting specific audio equipment categories.

Why we love this DAC/Amp

Premium Economy

Sensible spending meets sophisticated quality in perfect harmony 💫.


I tend to describe premium economy products as finding that sweet spot where exceptional value meets refined performance. Think of it like business class comfort at economy prices - you're getting significantly more than what you paid for. These headphones deliver a refined listening experience that rivals more expensive alternatives, making them an intelligent choice for discerning listeners who appreciate both value and excellence.


This thoughtfully curated selection demonstrates our commitment to bringing you outstanding sound quality and robust construction without requiring a significant financial investment. Each product has been meticulously evaluated to ensure it delivers performance characteristics typically associated with higher price brackets.


When you see "💎 Premium Economy" products, expect refined audio experiences that bridge the gap between entry-level and high-end offerings, delivering impressive clarity and features at accessible price points.


Serious Audiophiles Only

For those who have ventured deep into high-fidelity audio 🎯, the pursuit of sonic excellence becomes an endless journey of discovery and refinement. I believe that serious audiophiles demand equipment that can satisfy the most exacting standards and deliver performance that pushes boundaries. These products represent the pinnacle of acoustic engineering, incorporating advanced technologies and meticulous craftsmanship that enable them to reproduce music with utmost fidelity.


Each product has undergone rigorous evaluation to ensure it delivers exceptional performance that discerning listeners demand, from precise frequency response to impeccable detail retrieval and sophisticated sound staging. These devices incorporate premium components and engineering excellence that justify their position at the apex of audio performance.


When you encounter "🦈 Serious Audiophiles Only" products, expect uncompromising performance that satisfies the most demanding requirements and elevates critical listening to new heights.

Cult Following

Cause some things just demand dedication 💫!


I believe that when passionate audio enthusiasts consistently praise something, you know it's genuinely special. This exceptional audio gear has cultivated a devoted and passionate fanbase that recognises its extraordinary qualities and consistently celebrates its outstanding performance. Think of it like that hidden gem restaurant that doesn't advertise but always has a line of people who know something amazing. These products have earned legendary status through years of delivering experiences that resonate deeply with audio connoisseurs.


These selections have earned their legendary status through consistent delivery of exceptional experiences, creating a community of enthusiasts who understand something truly distinctive. The passionate community endorsement carries significant weight because it comes from real-world experience and genuine appreciation 🎯.


When you see "🧑🏼‍🤝‍🧑🏼 Cult Following" products, expect to join an exclusive community of passionate enthusiasts who've discovered something that consistently exceeds expectations.

Our Team's Favourite

Cause after all, we are audiophiles first 🎧!


In my experience, when our entire team gets excited about something, you know it's genuinely exceptional. This audio gear has captured the hearts and minds of our seasoned experts, distinguishing itself as a standout favourite among people who test hundreds of products every year. Think of it like getting a unanimous recommendation from a panel of audio critics - when everyone agrees, you pay attention.


These selections have not only met but exceeded our rigorous standards, earning enthusiastic endorsement from our audio specialists who've tested everything from budget options to flagship models. When you choose these products, you're selecting gear that has been thoroughly vetted and passionately embraced by genuine experts 🏆.


When you choose "💙 Our Team's Favourite" products, expect expertly vetted excellence backed by genuine enthusiasm from people who live and breathe audio every day.

For Audiophiles at Home

I’ve always loved the ritual of coming home, settling into my favourite chair, and firing up a dedicated setup. Gear labelled For Audiophiles at Home is made for those moments — when you can really sit back and appreciate music in its purest form 🛋️. These products tend to be more powerful, larger, and often require wall power — perfect for a stationary rig.


Here’s the trade-off: these setups often involve external DACs, amps, or full-size headphones, which means more space, more power, but also more immersive listening. They shine when used in quiet environments, where detail, depth, and dynamics can truly be appreciated.


When you see '🏠 For Audiophiles at Home' products, expect: exceptional fidelity, stronger output, and the kind of soundstage that makes you never want to leave your listening chair.

Connect With Cable

In my experience, there’s still nothing like the dependability of a wired connection when it comes to audio 🎧. I love describing it as the direct flight of music — no delays, no turbulence. When a product says “Connect with Cable,” it means you’re getting the most reliable signal path, with zero wireless compression and minimal interference.


Here’s what’s actually happening: a physical cable transmits uncompressed analog or digital signals directly from your source to your gear. This results in lower latency, no signal drops, and consistently better sound — especially when paired with a good DAC or amp. It’s ideal for critical listening, gaming, and professional use. The trade-off? You’re tethered — but for a lot of audiophiles, that’s a small price to pay for sonic purity.


When you see '🔗 Connect With Cable' products, expect: pure, uninterrupted sound quality that lets your gear perform at its full potential — perfect for focused, high-fidelity listening.

Why it Sounds Amazing

Power Output

I like to think of power output in audio gear like engine horsepower, it determines how much muscle your setup really has 💪. Whether you’re trying to drive a pair of power-hungry planar headphones or just want headroom for dynamic peaks, power output is the spec you want to check first.


Technically, it refers to the amount of electrical power (measured in mW or Watts) an amp or DAC/Amp combo can deliver to your headphones. More power means better control, improved dynamics, and the ability to handle demanding gear without distortion. But more isn’t always better, too much power with sensitive IEMs can introduce hiss or harshness.


When you see '🚀 Power Output' products, expect: strong driving capability, better dynamics, and optimal performance with headphones that need serious juice to shine.


Balanced Output

I often say balanced output is like using both hands to carry something heavy — it distributes power evenly and keeps things stable. In audio gear, balanced output helps reduce unwanted noise and interference, especially over longer cables. Think of it as a cleaner, more efficient way to transmit your music, ideal for anyone using high-end DACs, amps, or studio-grade headphones 🎧. You’ll typically find it on gear with XLR or 4.4mm connectors, and it's a must-have if you’re chasing that ultra-clean signal path.


Here’s what’s actually happening: a balanced output uses two separate signals, one inverted, so when interference is picked up along the cable, it gets cancelled out when the signals are recombined. The result? Cleaner audio, better dynamic range, and more power output — especially when paired with balanced headphones. The trade-off? You’ll need gear that supports balanced connections on both ends to really enjoy the benefits.


When you see '⚖️ Balanced Output' products, expect: ultra-low noise, more headroom, and better synergy with high-impedance headphones or sensitive IEMs — ideal for serious listening setups.

A Follow-Up To The Widely Popular A90, Topping Introduces A Fully Balanced Headphone Amplifier A90 Discrete

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.

Discrete NFCA Modules & Hybrid Feedback Architecture With UHGF For Unmatched Clarity

The A90 Discrete introduces a completely overhauled design, implementing fully discrete NFCA (Nested Feedback Composite Amplifier) modules. Each module uses 39 transistors, enabling excellent DC and AC performance. This approach enhances dynamic range and transparency, delivering pure, clean, and natural audio. Topping has improved the Voltage-Current Hybrid Feedback architecture, pairing it with UHGF (Ultra High Gain Feedback) technology. The result is an amplifier with ultra-low distortion, exceptional control, and the ability to drive even the most power-hungry headphones with authority.

Features Ground Loop Noise Terminator Switch (GLNTS) & Provides Ultra-Low Noise

To address hum or buzz caused by ground loops in complex setups, Topping includes a GND/LIFT switch. Simply toggle to LIFT to eliminate unwanted ground loop noise when multiple devices are connected to the same power source. With a noise floor as low as 0.2uVrms, the A90 Discrete is well-suited for even the most sensitive in-ear monitors. Its two-step gain switch ensures the right amount of power without hiss or noise, regardless of the connected headphones.

Precision-Matched Transistors For A Silent Background With 12V Trigger For Seamless Integration

The use of ultra-low noise, precision-matched transistors ensures that the amplifier maintains an incredibly silent background. This contributes to a pitch-black noise floor and enables you to hear fine details in your music like never before. Equipped with a 12V Trigger interface, the A90 Discrete can be synchronised with other gear. You can turn multiple devices on/off together using just a 3.5mm to 3.5mm cable, simplifying power management in complex setups.

High Output Power With Flexible Input Options & EXT90 Support

Thanks to its revamped internal design, the A90 Discrete can comfortably drive high-impedance headphones and sensitive IEMs alike. Its high output current and low impedance ensure minimal distortion and maximum control, even with demanding gear. Out of the box, the A90 Discrete includes 1 x XLR and 1 x RCA stereo input. When paired with the Topping EXT90, this expands to a total of 4 x XLR and 2 x RCA inputs, allowing you to build a full-featured desktop audio system with multiple sources.

Experience Accurate & Dynamic Sound Signature

Sound from the A90 Discrete is described as natural and uncoloured, with crisp bass, a smooth top-end, and a transparent midrange. It faithfully reproduces the character of a recording without adding coloration — ideal for analytical listening or mastering work.

Discrete NFCA Modules & Hybrid Feedback Architecture With UHGF For Unmatched Clarity

The A90 Discrete introduces a completely overhauled design, implementing fully discrete NFCA (Nested Feedback Composite Amplifier) modules. Each module uses 39 transistors, enabling excellent DC and AC performance. This approach enhances dynamic range and transparency, delivering pure, clean, and natural audio. Topping has improved the Voltage-Current Hybrid Feedback architecture, pairing it with UHGF (Ultra High Gain Feedback) technology. The result is an amplifier with ultra-low distortion, exceptional control, and the ability to drive even the most power-hungry headphones with authority.

Features Ground Loop Noise Terminator Switch (GLNTS) & Provides Ultra-Low Noise

To address hum or buzz caused by ground loops in complex setups, Topping includes a GND/LIFT switch. Simply toggle to LIFT to eliminate unwanted ground loop noise when multiple devices are connected to the same power source. With a noise floor as low as 0.2uVrms, the A90 Discrete is well-suited for even the most sensitive in-ear monitors. Its two-step gain switch ensures the right amount of power without hiss or noise, regardless of the connected headphones.

Precision-Matched Transistors For A Silent Background With 12V Trigger For Seamless Integration

The use of ultra-low noise, precision-matched transistors ensures that the amplifier maintains an incredibly silent background. This contributes to a pitch-black noise floor and enables you to hear fine details in your music like never before. Equipped with a 12V Trigger interface, the A90 Discrete can be synchronised with other gear. You can turn multiple devices on/off together using just a 3.5mm to 3.5mm cable, simplifying power management in complex setups.

High Output Power With Flexible Input Options & EXT90 Support

Thanks to its revamped internal design, the A90 Discrete can comfortably drive high-impedance headphones and sensitive IEMs alike. Its high output current and low impedance ensure minimal distortion and maximum control, even with demanding gear. Out of the box, the A90 Discrete includes 1 x XLR and 1 x RCA stereo input. When paired with the Topping EXT90, this expands to a total of 4 x XLR and 2 x RCA inputs, allowing you to build a full-featured desktop audio system with multiple sources.

Experience Accurate & Dynamic Sound Signature

Sound from the A90 Discrete is described as natural and uncoloured, with crisp bass, a smooth top-end, and a transparent midrange. It faithfully reproduces the character of a recording without adding coloration — ideal for analytical listening or mastering work.

Store Your Audio Settings With Memory Presets and User Profiles & R2R Relay Volume Control

You can store and recall two user-defined profiles (C1 and C2) that remember your current settings, including volume, input, output, and brightness. Perfect for quickly switching between headphone and speaker use or different listening preferences. Unlike standard potentiometers, the A90 Discrete uses a relay-based R2R volume control system. This offers superior channel matching, longer life, and eliminates low-volume imbalance — a common problem with sensitive IEMs.

Dual Functionality: Amplifier + Preamp With Simultaneous Output Options

The A90 Discrete isn’t just a headphone amplifier — it doubles as a high-quality preamplifier. With output impedance at 20Ω (SE) and 40Ω (balanced), it pairs effortlessly with various power amps, making it a versatile centre piece for any system. You can switch between headphone amp, preamp, or both simultaneously. This flexibility means you can run multiple output configurations without unplugging anything — convenient for desktop and studio setups.

Seamless Connectivity With Versatile Audio Input and Output Support

Connectivity is a strong point of the A90 Discrete. It includes a wide range of headphone output options to suit most cables and terminations: a 4-pin XLR balanced output, a 4.4mm balanced output, and a 6.35mm single-ended output.On the rear panel, you'll find balanced XLR inputs, single-ended RCA inputs, as well as balanced XLR and RCA preamp outputs. This variety ensures seamless integration into virtually any audio setup, whether you're using it purely as a headphone amp or as part of a larger system with external sources or power amplifiers.

Exquisitely Designed For Impeccable Aesthetics & Essential Accessories Included

Topping has long been recognized for merging sleek aesthetics with top-tier build quality, and the A90 Discrete is no exception. The design exudes a premium feel, with a solid chassis and elegant finish that will complement any desktop setup. Out of the box, the A90 Discrete comes ready to go. Included are a remote control, a 6.35mm to 3.5mm headphone adapter, an AC power cable, a warranty card, and a user manual. These accessories ensure you can set up and enjoy the amplifier immediately, regardless of your headphone plug type.

Comes With Full-Featured Remote Control For Easy Access To Features

Included is a comprehensive remote control that handles standby, input/output switching, gain control, volume, mute, and brightness adjustments. It even lets you store custom volume levels for each mode, ensuring smooth and safe listening transitions. (add if necessary)

Store Your Audio Settings With Memory Presets and User Profiles & R2R Relay Volume Control

You can store and recall two user-defined profiles (C1 and C2) that remember your current settings, including volume, input, output, and brightness. Perfect for quickly switching between headphone and speaker use or different listening preferences. Unlike standard potentiometers, the A90 Discrete uses a relay-based R2R volume control system. This offers superior channel matching, longer life, and eliminates low-volume imbalance — a common problem with sensitive IEMs.

Dual Functionality: Amplifier + Preamp With Simultaneous Output Options

The A90 Discrete isn’t just a headphone amplifier — it doubles as a high-quality preamplifier. With output impedance at 20Ω (SE) and 40Ω (balanced), it pairs effortlessly with various power amps, making it a versatile centre piece for any system. You can switch between headphone amp, preamp, or both simultaneously. This flexibility means you can run multiple output configurations without unplugging anything — convenient for desktop and studio setups.

Seamless Connectivity With Versatile Audio Input and Output Support

Connectivity is a strong point of the A90 Discrete. It includes a wide range of headphone output options to suit most cables and terminations: a 4-pin XLR balanced output, a 4.4mm balanced output, and a 6.35mm single-ended output.On the rear panel, you'll find balanced XLR inputs, single-ended RCA inputs, as well as balanced XLR and RCA preamp outputs. This variety ensures seamless integration into virtually any audio setup, whether you're using it purely as a headphone amp or as part of a larger system with external sources or power amplifiers.

Exquisitely Designed For Impeccable Aesthetics & Essential Accessories Included

Topping has long been recognized for merging sleek aesthetics with top-tier build quality, and the A90 Discrete is no exception. The design exudes a premium feel, with a solid chassis and elegant finish that will complement any desktop setup. Out of the box, the A90 Discrete comes ready to go. Included are a remote control, a 6.35mm to 3.5mm headphone adapter, an AC power cable, a warranty card, and a user manual. These accessories ensure you can set up and enjoy the amplifier immediately, regardless of your headphone plug type.

Comes With Full-Featured Remote Control For Easy Access To Features

Included is a comprehensive remote control that handles standby, input/output switching, gain control, volume, mute, and brightness adjustments. It even lets you store custom volume levels for each mode, ensuring smooth and safe listening transitions. (add if necessary)

Headphone Output

Topping A90 Discrete features a 4-pin XLR, 4.4mm and 6.35mm headphone output to connect with various devices.

Volume Control Knob

Topping A90 Discrete embeds a volume control knob that allows you to control the volume.

Meticulous Design

Topping A90 Discrete is meticulously designed with sleek aesthetics utilising top-tier build quality for enhanced durability.

Accessories to Get you Started

1. Remote Control
2. AC Cable
3. 6.35mm To 3.5mm Adapter
4. User Manual
5. Warranty Card


All You Need To Know About The Topping A90 Discrete

Headphone Output
3.5mm (Single-Ended)
4-PIN XLR (Balanced)
6.35mm (Single-Ended)
Input
XLR
RCA
Output
XLR
RCA
Headphone Amplifier Specification
THD+N @1kHz (A-wt) :
SE IN/SE OUT:<0.000065% @Output=500 mW(32Ω),
<0.000055% @Output=80 mW(300Ω)
BAL IN/SE OUT:<0.000080% @Output=500 mW(32Ω),
<0.000060% @Output=80 mW(300Ω)
SE IN/BAL OUT:<0.000065% @Output=2000 mW(32Ω),
<0.000055% @Output=320 mW(300Ω)
BAL IN/BAL OUT:<0.000080% @Output=2000 mW(32Ω),
<0.000060% @Output=320 mW(300Ω)
THD @20-20kHz (90kBW) :
SE IN/SE OUT:<0.00030% @Output=500 mW(32Ω),
<0.00025% @Output=80 mW(300Ω)
BAL IN/SE OUT:<0.00030% @Output=500 mW(32Ω),
<0.00025% @Output=80 mW(300Ω)
SE IN/BAL OUT:<0.00060% @Output=2000 mW(32Ω),
<0.00025% @Output=320 mW(300Ω)
BAL IN/BAL OUT:<0.00060% @Output=2000 mW(32Ω),
<0.00025% @Output=320 mW(300Ω)
SNR @MAX OUT 1kHz (A-wt)
SE IN/SE OUT:141 dB
BAL IN/SE OUT:137 dB BAL IN/BAL OUT:138dB
Dynamic Range @1kHz (A-wt) :
SE IN/SE OUT:141 dB
BAL IN/SE OUT:137 dB
SE IN/BAL OUT:145dB
BAL IN/BAL OUT:138dB
Frequency Response :
SE IN/SE OUT:20 Hz-40 kHz(±0.1dB)
BAL IN/SE OUT:20 Hz-40 kHz(±0.1dB)
SE IN/BAL OUT:20 Hz-40 kHz(±0.1dB)
BAL IN/BAL OUT:20 Hz-40 kHz(±0.1dB)
Output Level :
SE IN/SE OUT:25Vpp
BAL IN/SE OUT:25Vpp
SE IN/BAL OUT:49Vpp
BAL IN/BAL OUT:49Vpp
AP measured noise level @A-wt :
SE IN/SE OUT:<0.7uVrms @G=L, <1.1uVrms @G=H
BAL IN/SE OUT:<0.7uVrms @G=L, <1.1uVrms @G=H
SE IN/BAL OUT:<1.0uVrms @G=L, <1.8uVrms @G=H
BAL IN/BAL OUT:<1.0uVrms @G=L, <1.8uVrms @G=H
Actual noise level* @A-wt :
SE IN/SE OUT:<0.2uVrms @G=L, <0.6uVrms @G=H
BAL IN/SE OUT:<0.2uVrms @G=L, <0.6uVrms @G=H
SE IN/BAL OUT:<0.7uVrms @G=L, <1.6uVrms @G=H
BAL IN/BAL OUT:<0.7uVrms @G=L, <1.6uVrms @G=H
Channel Crosstalk @1kHz :
SE IN/SE OUT:-107 dB
BAL IN/SE OUT:-105dB
SE IN/BAL OUT:-116 dB
BAL IN/BAL OUT:-113dB
Input sensitivity :
SE IN/SE OUT:9.1Vrms @G=L, 3.0Vrms @G=H
BAL IN/SE OUT:9.3Vrms @G=L, 3.0Vrms @G=H
SE IN/BAL OUT:9.1Vrms @G=L, 3.0uVrms @G=H
BAL IN/BAL OUT:9.3Vrms @G=L, 3.0uVrms @G=H
Gain :
SE IN/SE OUT:0dB @G=L, 9.5dB @G=H
BAL IN/SE OUT:-0.2dB @G=L, 9.3dB @G=H
SE IN/BAL OUT:6.0dB @G=L, 15.5dB @G=H
BAL IN/BAL OUT:5.8dB @G=L, 15.3dB @G=H
Output Impedance :
SE IN/SE OUT:<0.1Ω
BAL IN/SE OUT:<0.1Ω
SE IN/BAL OUT:<0.2Ω
BAL IN/BAL OUT:<0.2Ω
Output Power
SE IN/SE OUT/BAL IN/SE OUT :
3300 mW X 2 @16Ω THD+N<0.1%,
2000 mW X 2 @32Ω THD+N<0.1%,
1100 mW X 2 @64Ω THD+N<0.1%,
250 X 2 @300Ω THD+N<0.1%
SE IN/BAL OUT/BAL IN/BAL OUT:
9800 mW X 2 @16Ω THD+N<0.1%,
6700 mW X 2 @32Ω THD+N<0.1%,
4000 mW X 2 @64Ω THD+N<0.1%,
1000 mW X 2 @300Ω THD+N<0.1%,
500 mW X 2 @600Ω THD+N<0.1%
Load Impedance :
SE IN/SE OUT:>8Ω
BAL IN/SE OUT:>8Ω
SE IN/BAL OUT:>8Ω
BAL IN/BAL OUT:>8Ω
Pre-amplifier Specification
THD+N @1kHz (A-wt) :
SE IN/SE OUT:<0.000055%
BAL IN/SE OUT:<0.000060%
SE IN/BAL OUT:<0.000055%
BAL IN/BAL OUT:<0.000060%
THD @20-20kHz (90kBW) :
SE IN/SE OUT:<0.00025%
BAL IN/SE OUT:<0.00025%
SE IN/BAL OUT:<0.00025%
BAL IN/BAL OUT:<0.00025%
SNR @1kHz (A-wt)
SE IN/SE OUT:141dB
BAL IN/SE OUT:137dB
SE IN/BAL OUT:145dB
BAL IN/BAL OUT:138dB
Dynamic Range @1kHz (A-wt) :
SE IN/SE OUT:141dB
BAL IN/SE OUT:137dB
SE IN/BAL OUT:145dB
BAL IN/BAL OUT:138dB
Frequency Response :
SE IN/SE OUT:20 Hz-40 kHz(±0.1dB)
BAL IN/SE OUT:20 Hz-40 kHz(±0.1dB)
SE IN/BAL OUT:20 Hz-40 kHz(±0.1dB)
BAL IN/BAL OUT:20 Hz-40 kHz(±0.1dB)
Output Level :
SE IN/SE OUT:25Vpp
BAL IN/SE OUT:25Vpp
SE IN/BAL OUT:25Vpp
BAL IN/BAL OUT:25Vpp
AP measured noise level @A-wt :
SE IN/SE OUT:<0.7uVrms @G=L, <1.1uVrms @G=H
BAL IN/SE OUT:<0.7uVrms @G=L, <1.1uVrms @G=H
SE IN/BAL OUT:<1.0uVrms @G=L, <1.8uVrms @G=H
BAL IN/BAL OUT:<1.0uVrms @G=L, <1.8uVrms @G=H
Actual noise level* @A-wt :
SE IN/SE OUT:<0.2uVrms @G=L, <0.6uVrms @G=H
BAL IN/SE OUT:<0.2uVrms @G=L, <0.6uVrms @G=H
SE IN/BAL OUT:<0.7uVrms @G=L, <1.6uVrms @G=H
BAL IN/BAL OUT:<0.7uVrms @G=L, <1.6uVrms @G=H
Channel Crosstalk @1kHz :
SE IN/SE OUT:-107 dB
BAL IN/SE OUT:-105dB
SE IN/BAL OUT:-116 dB
BAL IN/BAL OUT:-113dB
Input sensitivity :
SE IN/SE OUT:9.1Vrms @G=L, 3.0uVrms @G=H
BAL IN/SE OUT:9.3Vrms @G=L, 3.0uVrms @G=H
SE IN/BAL OUT:9.1Vrms @G=L, 3.0uVrms @G=H
BAL IN/BAL OUT:9.3Vrms @G=L, 3.0Vrms @G=H
Gain :
SE IN/SE OUT:0dB @G=L, 9.5dB @G=H
BAL IN/SE OUT:-0.2dB @G=L, 9.3dB @G=H
SE IN/BAL OUT:6.0dB @G=L, 15.5dB @G=H
BAL IN/BAL OUT:5.8dB @G=L, 15.3dB @G=H
Output Impedance :
SE IN/SE OUT:20Ω
BAL IN/SE OUT:20Ω
SE IN/BAL OUT:40Ω
BAL IN/BAL OUT:40Ω
Box Contents
1. Topping A90 Discrete
2. Remote Control
3. AC Cable
4. 6.35mm to 3.5mm Adapter
5. User Manual
6. Warranty Card


1 Year Warranty

Don't sweat it, this Topping - A90 Discrete comes with a 1 Year warranty on the Amp/DAC and 6 months on the battery 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.

Explore Collection
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

Have a question? Get in touch!

Check out the most common questions our customers ask. Still have questions? Talk to our Headphone Gurus.

Our customer support is available Monday to Friday: 10.30am-6:30pm.Average answer time: 2-3 Hours

Other Details


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
Dimensions 22.2 x 16 x 4.5 CM
Net Quantity 1
Manufacturer Details Name: Tok Shun Co., Limited
Address: 1318-19, 13/F, Hollywood Plaza, 610 Nathan Road, HK.
Package Contents TOPPING A90 Discrete
Remote ControL, AC Cable
6.35mm To 3.5mm Adapter
User ManuaL, Warranty Card

Manuals & Guides



User Manual | A90 Discrete

Desktop Headphone Amplifier + Pre-Amp



You May Also Like

Customer Reviews

Be the first to write a review
0%
(0)
0%
(0)
0%
(0)
0%
(0)
0%
(0)