TOPPING - A90 Discrete
Desktop Headphone Amplifier + Pre-AmpGET 18% GST INPUT
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Chi-Fi
Excellence
Ideal for Audiophiles
These DAC & Amps are designed for discerning music lovers. If audio quality is important to you, a set of DAC & Amps like these would be ideal.
You can expect these DAC & Amps to present you with a refined listening experience. The audio quality exhibited by these DAC & Amps is a beautiful mix of musicality, technical brilliance and high precision.
These DAC & Amps deliver a spacious & open soundstage that makes you feel you are sitting at a live concert. Experience the magic and delve into pure sonic tranquility!
Ideal for
Indoor Use
For Studio & Professionals
As the name implies, anything branded as studio headphones is designed especially for a studio setting with a particular focus on accuracy and transparency for monitoring and mixing.
These headphones present an accurate image of your music than ordinary headphones, allowing you to hear every nuance and aspect of your music. Therefore, having a good set of studio headphones is just as important as any other gear in your studio.
These headphones provide a fresh perspective to that mix you’ve spent hours mastering and recording, essentially giving you another set of ears.
4-Pin XLR & 4.4mm
Balanced Output
Connect With
3-Pin XLR & RCA
6700mW X 2 @ 32 Ω
Power Output
Volume Controls
If your DAC & Amps include volume controls or volume rockers, you can easily change the volume with a button press or volume knob turn.
DAC & Amps that have volume controls make its operation incredibly simple; turn up the volume on your smartphone or your source devices and then change the volume on DAC & Amps to the desired level.
This design feature allows you to have complete control over the desired volume according to your listening preferences.
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.
About RAGHAV SOMANI
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.
DESCRIPTION
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.
AN NFCA MODULE FUSED WITH UHGF AND OPTIMISED VOLTAGE CURRENT HYBRID FEEDBACK ARCHITECTURE DELIVERS CLEAN AND PRECISE AUDIO PERFORMANCE
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.
A90 DISCRETE COUPLED WITH AN EXTENDER INPUT INTERFACE THAT CAN DRIVE THE MOST DEMANDING HEADPHONES WITH LOW DISTORTION
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.
TOPPING A90 DISCRETE DOUBLES UP AS AN AMPLIFIER AND PRE-AMPLIFIER WITH A FULLY-FEATURED REMOTE CONTROL
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.
FEATURES TWO-STEP GAIN SETTINGS, AN R2R VOLUME CONTROL KNOB, AND GLNTS TO REDUCE GROUND LOOP NOISE
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.
EXQUISITE DESIGN FUSED WITH ACCESSORIES AND NUMEROUS INPUTS AND OUTPUTS FOR EASY CONNECTIVITY AND COMPATIBILITY
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.
SPECS
| THD+N @ 1 KHZ 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+N @ 20-20 KHZ 90 kBW | 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 1 KHZ-A-WT | SE IN/SE OUT:141 dB BAL IN/SE OUT:137 dB SE IN/BAL OUT:145dB 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 @1 kHz | 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 |
| THD+N @ 1 KHZ 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+N @ 20-20KHZ 90 kBW | 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 @1 KHZ-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 @1 kHz | 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 |
| 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 |
FAQs
What is the warranty period on the TOPPING A90 Discrete?
All TOPPING products come with 1 year of warranty. To claim warranty read more on TOPPING Warranty
Where is the TOPPING brand based?
TOPPING is a company based in Guangzhou, China.
How is the volume display setting visible on the TOPPING A90 Discrete?
TOPPING A90 Discrete displays the volume in levels.
Can TOPPING A90 Discrete be used as a pre-amp?
Yes, The TOPPING A90 Discrete can be used as the preamp of the LA90, providing more precise volume control, remote control, and additional input.
What are the various inputs and outputs provided?
The TOPPING A90 Discrete 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.
How do I connect my headphones with the TOPPING A90 Discrete?
You can connect to a audio source devices with the 4-Pin XLR, 4.4mm and 6.35mm headphone outputs.
What are the major differences between TOPPING A90 and A90 Discrete?
The A90D is an upgrade across the board. It’s more powerful, less distorted, and includes some great quality-of-life improvements. A front panel volume display and remote control allow you to control the A90D from the comfort of your couch. A ground loop noise terminator ensures clean output no matter how long your audio chain becomes. Output volume memorization allows you to dial in on the right level for you–and keep it there for next time. The A90 uses a standard volume potentiometer. These often suffer from channel imbalance at low volumes, which makes listening to sensitive IEMs a challenge. The A90D, on the other hand, uses an R2R volume controller. These offer massive advantages over standard potentiometers, like outstanding THD+N, SNR, and extremely well-balanced channels.
What does the package include?
You will be greeted with the Topping A90 Discrete. The package also includes AC cable, 6.35mm to 3.5mm adapter, Remote control, User manual, and Warranty card.
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.
AN NFCA MODULE FUSED WITH UHGF AND OPTIMISED VOLTAGE CURRENT HYBRID FEEDBACK ARCHITECTURE DELIVERS CLEAN AND PRECISE AUDIO PERFORMANCE
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.
A90 DISCRETE COUPLED WITH AN EXTENDER INPUT INTERFACE THAT CAN DRIVE THE MOST DEMANDING HEADPHONES WITH LOW DISTORTION
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.
TOPPING A90 DISCRETE DOUBLES UP AS AN AMPLIFIER AND PRE-AMPLIFIER WITH A FULLY-FEATURED REMOTE CONTROL
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.
FEATURES TWO-STEP GAIN SETTINGS, AN R2R VOLUME CONTROL KNOB, AND GLNTS TO REDUCE GROUND LOOP NOISE
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.
EXQUISITE DESIGN FUSED WITH ACCESSORIES AND NUMEROUS INPUTS AND OUTPUTS FOR EASY CONNECTIVITY AND COMPATIBILITY
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.
| THD+N @ 1 KHZ 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+N @ 20-20 KHZ 90 kBW | 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 1 KHZ-A-WT | SE IN/SE OUT:141 dB BAL IN/SE OUT:137 dB SE IN/BAL OUT:145dB 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 @1 kHz | 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 |
| THD+N @ 1 KHZ 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+N @ 20-20KHZ 90 kBW | 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 @1 KHZ-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 @1 kHz | 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 |
| 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 |
What is the warranty period on the TOPPING A90 Discrete?
All TOPPING products come with 1 year of warranty. To claim warranty read more on TOPPING Warranty
Where is the TOPPING brand based?
TOPPING is a company based in Guangzhou, China.
How is the volume display setting visible on the TOPPING A90 Discrete?
TOPPING A90 Discrete displays the volume in levels.
Can TOPPING A90 Discrete be used as a pre-amp?
Yes, The TOPPING A90 Discrete can be used as the preamp of the LA90, providing more precise volume control, remote control, and additional input.
What are the various inputs and outputs provided?
The TOPPING A90 Discrete 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.
How do I connect my headphones with the TOPPING A90 Discrete?
You can connect to a audio source devices with the 4-Pin XLR, 4.4mm and 6.35mm headphone outputs.
What are the major differences between TOPPING A90 and A90 Discrete?
The A90D is an upgrade across the board. It’s more powerful, less distorted, and includes some great quality-of-life improvements. A front panel volume display and remote control allow you to control the A90D from the comfort of your couch. A ground loop noise terminator ensures clean output no matter how long your audio chain becomes. Output volume memorization allows you to dial in on the right level for you–and keep it there for next time. The A90 uses a standard volume potentiometer. These often suffer from channel imbalance at low volumes, which makes listening to sensitive IEMs a challenge. The A90D, on the other hand, uses an R2R volume controller. These offer massive advantages over standard potentiometers, like outstanding THD+N, SNR, and extremely well-balanced channels.
What does the package include?
You will be greeted with the Topping A90 Discrete. The package also includes AC cable, 6.35mm to 3.5mm adapter, Remote control, User manual, and Warranty card.
Don't sweat it, this
TOPPING - A90 Discrete comes with a 1 Year warranty
from TOPPING that covers manufacturing defects.
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