Lightly used.The product shown in the photo will be shipped as is.It works properly.Please check the cosmetic condition in the photos. ?Fully discrete NFCA also create wonderful amp? TOPPING A90D uses fully discrete components to redesign the NFCA (Nested Feedback Composite Amplifier)module. 4 built-in NFCA-Discrete modules which each them uses 39 transistors build up fully balanced structure. The optimized Voltage Current hybrid feedback architecture along with UHGF (Ultra High Gain Feedback) technology provide excellent DC and AC performance.?High output voltage, high current, low output impedance, no headphones that cant be dealt with?High output voltage can easily drive high impedance headphones; High output current allows low-sensitivity headphones to obtain enough power; The low output impedance will not bring unnecessary effect on FR when driving low-impedance headphones. Different headphones can be easily driven by the A90 Discrete.?2 Gain settings? TOPPING 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 gain to drive full-sized over-ears. Combined with the 0.2uVrms ultra-low noise, even sensitive lEMs will not suffer from any noise.?Ground Loop Noise Terminator? Ground loop noise may be encountered when multiple devices are used in combination. A90 Discrete adds a GND/LIFT switch to solve this problem. When in normal use, set it to GND; and when ground loop noise is encountered, switch it to LIFT. Then the ground loop noise is eliminated.?A Headphone Amp, also a Preamp? When it is in preamp mode, you can get the same high performance as the headphone amp mode, and the 20ohm SE and 40ohm 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 at the same time.

Used working Topping A90 Discrete balanced headphone amplifier and preamp. If anything is not working, please let me know, and you can return it at my expense, for a full refund. Only what is pictured is included. If it is not pictured it is not included. This listing includes: 1 x Topping A90 Discrete Balanced Headphone Amplifier and Preamp1 x Remote1 x Power Cable

This is a gently used Topping A90D balanced amplifier. I used this for about 2 months before upgrading to a more expensive amplifier. Honestly, not much difference in the end. Comes with original box, cords, remote, and instructions.

Lightly used.The product shown in the photo will be shipped as is.It works properly.Please check the cosmetic condition in the photos. ?Fully discrete NFCA also create wonderful amp? TOPPING A90D uses fully discrete components to redesign the NFCA (Nested Feedback Composite Amplifier)module. 4 built-in NFCA-Discrete modules which each them uses 39 transistors build up fully balanced structure. The optimized Voltage Current hybrid feedback architecture along with UHGF (Ultra High Gain Feedback) technology provide excellent DC and AC performance.?High output voltage, high current, low output impedance, no headphones that cant be dealt with?High output voltage can easily drive high impedance headphones; High output current allows low-sensitivity headphones to obtain enough power; The low output impedance will not bring unnecessary effect on FR when driving low-impedance headphones. Different headphones can be easily driven by the A90 Discrete.?2 Gain settings? TOPPING 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 gain to drive full-sized over-ears. Combined with the 0.2uVrms ultra-low noise, even sensitive lEMs will not suffer from any noise.?Ground Loop Noise Terminator? Ground loop noise may be encountered when multiple devices are used in combination. A90 Discrete adds a GND/LIFT switch to solve this problem. When in normal use, set it to GND; and when ground loop noise is encountered, switch it to LIFT. Then the ground loop noise is eliminated.?A Headphone Amp, also a Preamp? When it is in preamp mode, you can get the same high performance as the headphone amp mode, and the 20ohm SE and 40ohm 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 at the same time.

Upgrade your headphone experience with the Topping A90 discrete audio amplifier. This amplifier features stereo RCA and XLR in/outputs and 4.4mm and 4-pin xlr balance connection with remote control to bring your sound to life with a warm discrete soundstage. With a sleek silver metallic design construction, the Topping A90d is perfect for any headphone audio setup. Enjoy high-quality completely dark background audio with a powerful 9-watt output per channel you can run ANY headphones no matter how power hungry they are. The Topping A90d delivers exceptional wide and warm sound quality perfect for amplifying even your desktop 6-inch monitor speakers, this amplifier is a must-have for any audiophile. Comes withOriginal boxAmplifier unitPower cableRemote control

In mint condition. Has all original contents and packaging.

Lightly used.The product shown in the photo will be shipped as is.It works properly.Please check the cosmetic condition in the photos. ?Fully discrete NFCA also create wonderful amp? TOPPING A90D uses fully discrete components to redesign the NFCA (Nested Feedback Composite Amplifier)module. 4 built-in NFCA-Discrete modules which each them uses 39 transistors build up fully balanced structure. The optimized Voltage Current hybrid feedback architecture along with UHGF (Ultra High Gain Feedback) technology provide excellent DC and AC performance.?High output voltage, high current, low output impedance, no headphones that cant be dealt with?High output voltage can easily drive high impedance headphones; High output current allows low-sensitivity headphones to obtain enough power; The low output impedance will not bring unnecessary effect on FR when driving low-impedance headphones. Different headphones can be easily driven by the A90 Discrete.?2 Gain settings? TOPPING 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 gain to drive full-sized over-ears. Combined with the 0.2uVrms ultra-low noise, even sensitive lEMs will not suffer from any noise.?Ground Loop Noise Terminator? Ground loop noise may be encountered when multiple devices are used in combination. A90 Discrete adds a GND/LIFT switch to solve this problem. When in normal use, set it to GND; and when ground loop noise is encountered, switch it to LIFT. Then the ground loop noise is eliminated.?A Headphone Amp, also a Preamp? When it is in preamp mode, you can get the same high performance as the headphone amp mode, and the 20ohm SE and 40ohm 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 at the same time.

Lightly used.The product shown in the photo will be shipped as is.It works properly.Please check the cosmetic condition in the photos. ?Fully discrete NFCA also create wonderful amp? TOPPING A90D uses fully discrete components to redesign the NFCA (Nested Feedback Composite Amplifier)module. 4 built-in NFCA-Discrete modules which each them uses 39 transistors build up fully balanced structure. The optimized Voltage Current hybrid feedback architecture along with UHGF (Ultra High Gain Feedback) technology provide excellent DC and AC performance.?High output voltage, high current, low output impedance, no headphones that cant be dealt with?High output voltage can easily drive high impedance headphones; High output current allows low-sensitivity headphones to obtain enough power; The low output impedance will not bring unnecessary effect on FR when driving low-impedance headphones. Different headphones can be easily driven by the A90 Discrete.?2 Gain settings? TOPPING 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 gain to drive full-sized over-ears. Combined with the 0.2uVrms ultra-low noise, even sensitive lEMs will not suffer from any noise.?Ground Loop Noise Terminator? Ground loop noise may be encountered when multiple devices are used in combination. A90 Discrete adds a GND/LIFT switch to solve this problem. When in normal use, set it to GND; and when ground loop noise is encountered, switch it to LIFT. Then the ground loop noise is eliminated.?A Headphone Amp, also a Preamp? When it is in preamp mode, you can get the same high performance as the headphone amp mode, and the 20ohm SE and 40ohm 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 at the same time.

Item TitleTopping A90 Discrete Headphone Amplifier DescriptionThank you for your interest.The simple operation has been verified.There are scratches but no functional problems.All accessories are shown in the photo.Please note that we may not be able to answer technical questions. Payment Supports managed payments Please pay within 5 days after auction is finished. About Us We are located in Japan. Its our pleasure to make you happy by proposing our recommend item. If you have any questions or request about items please feel free to ask us. International Buyers - Please Note: -Import duties taxes and charges are not included in the item price or shipping charges. These charges are the buyers responsibility. -Please check with your countrys customs office to determine what these additional costs will be prior to bidding/buying. -These charges are normally collected by the delivering freight (shipping) company or when you pick the item up - do not confuse them for additional shipping charges. -We do not mark merchandise values below value or mark items as - gifts - The US and International government regulations prohibit such behavior. Thank you for your understanding.

Introducing the Topping A90D Discrete Balanced Headphone Amplifier, a high-quality audio device designed for music enthusiasts who value excellent sound quality. This amplifier features a sleek black design, with two audio inputs and outputs, and a number of channels and inputs of 2. The audio inputs include stereo L/R RCA and XLR, while the audio outputs include RCA, headphone jack, and XLR. The Topping A90D is a reliable and durable headphone amplifier that provides a powerful and clear audio experience. It is perfect for those who want to enhance their music listening experience without compromising on style and functionality. Get your hands on this amazing audio device today and enjoy high-quality sound quality like never before!

Comes with: A90 Headphone AmplifierAC cable6.35mm to 3.5mm adapterUser manualWarranty card

Like New, Under 10 hrs. Sleeker looking than ever before, solid build qualitySmall footprint and is lightweight enough to be used in any setupVery powerful for its size, fully drove a wall of headphonesTraded linearity with a much better tonal balanceRicher, warmer and fuller sounding than any other Topping-made amplifierSuper-extended at both ends of the spectrumBetter dynamics with harder-to-drive headphones, there’s finally a fun factor on a Topping-made amplifierAn improved transient response, especially when landing sub-bass notesLacks any kind of noise or distortion even at max power, an IEM-friendly amp for sureCrazy levels of transparency and detail-retrievalSlightly wider and deeper sounding compared to their past doings could challenge even bigger and pricier ampsOffers precise imaging and an outstanding layeringLacks glare and listening fatigueAn outstanding value!

Like New, Under 10 hrs. Sleeker looking than ever before, solid build qualitySmall footprint and is lightweight enough to be used in any setupVery powerful for its size, fully drove a wall of headphonesTraded linearity with a much better tonal balanceRicher, warmer and fuller sounding than any other Topping-made amplifierSuper-extended at both ends of the spectrumBetter dynamics with harder-to-drive headphones, there’s finally a fun factor on a Topping-made amplifierAn improved transient response, especially when landing sub-bass notesLacks any kind of noise or distortion even at max power, an IEM-friendly amp for sureCrazy levels of transparency and detail-retrievalSlightly wider and deeper sounding compared to their past doings could challenge even bigger and pricier ampsOffers precise imaging and an outstanding layeringLacks glare and listening fatigueAn outstanding value!

Like New, Under 10 hrs. Sleeker looking than ever before, solid build qualitySmall footprint and is lightweight enough to be used in any setupVery powerful for its size, fully drove a wall of headphonesTraded linearity with a much better tonal balanceRicher, warmer and fuller sounding than any other Topping-made amplifierSuper-extended at both ends of the spectrumBetter dynamics with harder-to-drive headphones, there’s finally a fun factor on a Topping-made amplifierAn improved transient response, especially when landing sub-bass notesLacks any kind of noise or distortion even at max power, an IEM-friendly amp for sureCrazy levels of transparency and detail-retrievalSlightly wider and deeper sounding compared to their past doings could challenge even bigger and pricier ampsOffers precise imaging and an outstanding layeringLacks glare and listening fatigueAn outstanding value!

For sale I have two Sparkos Labs SS3602 dual discrete op amps. I bought these directly from Sparkos Labs and used them for about 3 hours in my Burson Audio DAC while I was doing some op amp rolling to find the right sound in my system. The op amps sounded very nice but I am going another route so I don’t need these any longer. Again, they were both installed at the same time in the same DAC for the same amount of time, they probably really aren’t even broken in yet, they are basically new. Let me know if you have any questions. Thanks.

Topping A90D Discrete headphone amplifier in black in flawless condition. Includes the RC-16A remote and the power cable. Ships in original packaging (will be double boxed). I ship next business day after payment is received. Ive been selling on eBay since 1999. Check my feedback and buy with confidence!

Up for auction is my used, but mint condition Topping A90D Discrete-Balanced 4.4mm and XLR Headphone Amplifier and Pre Amp. This amplifier is a premium audio device that ensures high-quality sound output with extreme power, without distortion. This is a balanced output amplifier with a relay volume controlled preamp mode for both single ended and balanced inputs, making it a versatile component for any audio setup. This headphone amplifier is ideal for anyone looking to enhance their audio experience. It has two channels and two inputs, providing a robust audio performance. Whether youre listening to music or watching movies, the Topping A90D ensures that every sound is crisp and clear. Sit back with the remote and enjoy your tunes or movies from the couch. The device will come in the original box, with the remote and power cable. I try my best to ship the same day payment is received with insurance and tracking included.

Topping A90D Discrete headphone amplifier in flawless condition, true open box. Includes the RC-16 remote (the jog wheel on the front also has all the functions and settings). Will ship the same day if ordered before 12pm EST weekdays and be very sell packed. Please send a note with any questions for a prompt reply. We ship the same day on orders before 12 noon EST Mon-Fri and 10am Saturday. Your order will be packed and boxed very carefully. Visit our store, we specialize in audio equipment, and constantly have new items arriving.

SPARKOS LABS SS3602 Quantity (1) one Discrete Dual OPAMP DIP8 USA MADE. I have one (1) SPARKOS LABS Dual Discrete SS3602 OPAMP for sale. Tested and Sounds Fantastic. SPARKOS LABS Dual Discrete SS3602 OPAMP, DIP8 form factor.  Designed to update outdated and poor sounding IC OPAMPS, these can bring new life to electronics. Installing these devices in place of ordinary IC op amps in your audio system will yield vast performance improvements ranging from quieter or blacker background due to their low noise performance, and more detailed, crystal clear highs due to their high loop gain and two pole compensation.  

This is like-new. I purchased new, but I no longer need it. This amplifier is very well regarded and sells new for over $700. This unit does not have a remote, it wasnt designed with one. Experience high-quality audio with the Topping LA90 Discrete Hi-Fi Audio Amplifier. This powerful amplifier is perfect for those who want to elevate their audio experience to the next level. With 60W of power and 2 amplifier channels, you can enjoy crystal clear audio with minimal distortion.The Topping LA90 is a sleek and stylish piece of equipment that looks great in any home audio setup. It has XLR audio inputs, 3 number of inputs, and 2 number of outputs, making it easy to connect all of your audio devices. The black color and modern design of the amplifier make it a great addition to any home entertainment system. This unit is extremely transparent and detailed.

I am selling my DAC + AMP Combo- Topping A90 Discrete- Topping D90SEBoth in silver. Im also including the balanced XLR cables.Both work great and are in very good cosmetic condition as can be seen in the photosThank you and good luck

Matched pair pulled from a VTV amplifier. Enhance your audio experience with Sonic Imagery Labs 990Enh-Ticha Discrete OpAmps, designed for DIY OpAmp upgrades. This matched pair of OpAmps is made in the United States and is compatible with burson 252c, 2520 dexa, and audio gd brands. These OpAmps are perfect for amplifier parts and components, as well as TV, video, and home audio systems. Bring high-quality sound to your consumer electronics with this reliable and versatile product. Enjoy free shipping with your purchase of the Sonic Imagery Labs 990Enh-Ticha Discrete OpAmps.

Matched pair pulled from a VTV amplifier. Enhance your audio experience with Sonic Imagery Labs 990Enh-Ticha Discrete OpAmps, designed for DIY OpAmp upgrades. This matched pair of OpAmps is made in the United States and is compatible with burson 252c, 2520 dexa, and audio gd brands. These OpAmps are perfect for amplifier parts and components, as well as TV, video, and home audio systems. Bring high-quality sound to your consumer electronics with this reliable and versatile product. Enjoy free shipping with your purchase of the Sonic Imagery Labs 990Enh-Ticha Discrete OpAmps.

Matched pair pulled from a VTV amplifier. Enhance your audio experience with Sonic Imagery Labs 990Enh-Ticha Discrete OpAmps, designed for DIY OpAmp upgrades. This matched pair of OpAmps is made in the United States and is compatible with burson 252c, 2520 dexa, and audio gd brands. These OpAmps are perfect for amplifier parts and components, as well as TV, video, and home audio systems. Bring high-quality sound to your consumer electronics with this reliable and versatile product. Enjoy free shipping with your purchase of the Sonic Imagery Labs 990Enh-Ticha Discrete OpAmps.