TOPPING A90 Discrete
Fully Discrete Balanced Remote Control Headphone Amplifier
- Fully Discrete NFCA
- Two Gain Settings
- Ground Loop Noise Terminator
- A Headphone Amp, also a Preamp
- Customize Volume Control
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Free standard shipping to most countries
Free express shipping on orders over $270*. Enjoy free tax and duty paid to most countries. Please refer to our shipping FAQ to see if you apply.
Covid-19 Shipping Delay Notice
Linsoul Audio is the authorized distributor. All products are authentic and genuine.
Worldwide Free Shipping
We are located in China but send our products worldwide for free. T&Cs apply.
1 Year Warranty
We provide 1 year warranty for the all products except the cables*.
Fully Discrete NFCA
As its name, A90 Discrete features fully discrete components to redesign the NFCA (Nested Feedback Composite Amplifier) module. There are 4 built-in NFCA-Discrete modules building up fully balanced structure with 39 transistors. The optimized Voltage Current hybrid feedback architecture along with UHGF (Ultra High Gain Feedback) technology provide excellent DC and AC performance. Benefiting from the new design, its output capability is stronger than ever, which allows the amp driving low impedance headphones even more effortlessly. The unparalleled distortion and noise performance are ensured because of the paralleled ultra-low noise precision matched transistors in the design.
Two Gain Settings
The A90 Discrete has two gain options, which 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 IEMs will not suffer from any noise.
Ground Loop Noise Terminator
Ground loop noise may be encountered when multiple devices are used in combination. Topping 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
The A90 Discrete is not only able to drive the headphones but also served as 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. The full-featured remote control makes it more convenient for you.
Customize Volume Control
A90 Discrete characterizes a R2R volume control composed of relays and resistor networks, which brings the advantages of precise Control, longevity, complete channel balanced and remote control. According to the customized settings, a safe volume can beset to avoid sudden loud sound after power on/input switch. A90 Discrete can also set to memorizes both the output volume and the input volume.
WHAT'S IN THE BOX
Sharp and precise sound but never harsh while remaining musical. Electronic music shines on this device !
This amp has technology that you can see in amps double the price and shortens the gap in quality between the units. Highly recommend, this is the only non class A headphone amp I like.
Our Shipping Process
If everything goes right our system will automatically generate your order and send you a confirmation email. If you don't receive the confirmation email please double-check that it wasn't automatically stored in your spam or promotions folder.
ORDER PROCESSING3 Working Days*
Most of the items you see are in stock and ready to be shipped after 3 working days. If you plan to order a custom (Design or Fit) product, a pre-order, or a made to order item processing times may change on item to item basis.
Standard Shipping15 to 30 Days.
Standard shipping is offered free worldwide for orders under $269 USD (with some exceptions), but please consider that delivery times may vary considerably depending on your country, up to 90 Days.
Express Shipping3-6 Working Days.
Most items over $270 include free express shipping (DHL or similar). If your order total is under $270 you can manually add Express Shipping at the checkout page for $15.00 - $35.00USD
Which countries do you ship to?
We are generally able to ship to most countries via Express Shipping, and many countries via Standard Shipping. You may clarify this with our team to check whether Standard Shipping is available to your country.
We cannot ship to addresses that are "PO boxes or APO/FPO".
*Note: Generally, we can only do Selected Shipping to India and Russia. We can only do Express Shipping to Africa, Argentina, Hawaii, Kuwait, Mauritius, Montenegro and Sri Lanka, to name a few.
This may be subjected to changes due to unpredictable issues such as Covid, war, and etc.
How much does shipping cost?
We have two shipping methods - Standard Shipping and Express Shipping.
Standard Shipping is free for most countries, while Express Shipping is 15-35USD depending on your country. If your order is over 270USD, Express Shipping is free*.
*This applies for most countries. However, large items such as headphones and desktop DAC/AMPs (e.g. HarmonicDyne G200, MUSICIAN MDP-2, and etc.) are excluded.
Shipping fees exclude import taxes or processing fees that may be applicable for your country. Linsoul is not responsible for such fees. Should you refuse to pay the tax/customs fees, shipping fees will still be deducted from the amount paid for the two-way freight charges. The cost of the freight charges may be more than the amount reflected on your order due to tax and other miscellaneous fees.
Some parcels claimed to be “returned to the seller” may be destroyed by the post office or customs officers when buyers refuse to accept their parcels or fail to pay for their taxes. No refund will be processed for such cases.
Standard Shipping via YunExpress is a tax-inclusive option for some countries. However, Linsoul will not be responsible for additional administrative or handling fees charged by your local courier company or customs. Please kindly check this with your local customs.
For certain remote areas, there may be additional charges via Express Shipping. We will contact you if there is a need to make additional payments.
Please contact us before placing an order, should you have any queries regarding shipping.
How long does it take to receive the order after it is placed?
For in-stock products, your order will be shipped within 3 working days. You may check with our staff regarding the in-stock status of any products.
Customized items will take a longer time. Please contact our staff for more information.
On normal non-sale days, once your parcel has been shipped out:
- For Standard Shipping, it takes about 2-4 weeks for items to be delivered after shipping out. For some countries, it might take up to 2-3 months, depending on your country, its customs and other factors.* The duration for transit is something beyond our control. Linsoul will not be making refunds for such cases. Please consider an upgrade to Express Shipping or keep the waiting time in mind.
- For Express Shipping, it takes about 3-7 days for items to be delivered after shipping out.
*Note: Timings might be affected due to festive seasons or other unforeseen circumstances
What happens if the parcel has been shipped but not delivered?
- First, kindly contact your local courier using the local tracking number.
If your parcel were to be in transit for at least 3 months, it may have been lost in transit.
For orders below $50USD, you may either opt for a one-time reshipment of parcel OR a full refund of the amount paid in cash via PayPal/Credit/Debit card.
For orders above $50USD, we will only process a 50% refund of your order paid in cash via PayPal/Credit/Debit card. Should there be any concern about Standard Shipping, you are encouraged to opt for DHL Express Shipping instead.
- Customers are to bear the consequences and fees incurred, if the parcel was undelivered due to any of the following situation:
- Wrong address or phone number provided by recipient
- Recipient was uncontactable when courier company contacted
- Refusal to sign for the package by recipient
- Lost or damaged parcel because recipient opted for “no-signature delivery”
- Refusal to pay for the local tax/processing fee by recipient
- Refusal to provide supporting documents for custom clearance by recipient
Who will pay for the import tax/custom fees
Customers have to bear any form of custom/import/processing fees that are applicable for your parcel.
Should you be unwilling to pay for the fees and reject the delivery of the parcel, you will still have to pay for the shipping cost. Linsoul will only refund the amount of your order after deducting the two-way shipping fees incurred.
How do I get help for my order?
Cancellation or/and modification of orders can only be done manually via our staff, provided that our Warehouse Team has not processed your order.
As our Support Team might not be available during non-working days and weekends, please place your order wisely.
Should you really need to cancel or/and modify your order after purchase, please contact us via our support email (Support@Linsoul.com) or website chat. We will help you with the changes if that could be done.
In general, upon receiving your parcel, please confirm the contents of the package and ensure that the package is in good condition before signing for it. All customers are strongly advised to take an unboxing video of their parcel and packaging when opening their parcels and products.
For faulty/missing items, please send an email to support@Linsoul.com for after-sale services. The following details are required.
1) Send an email to support@Linsoul.com with an appropriate Subject Title
2) Provide your order number and state the issue clearly
3) Attach photos and videos to show that your product is faulty/missing. Shipping details on the parcel packaging have to be clearly visible.
If the photos/videos provided are insufficient to prove the stated issue, we will enquire more. Once the issue has been confirmed, we will arrange for a replacement, partial refund or a full refund (where applicable). For incorrect products, Linsoul reserves all rights in deciding whether you need to return the incorrect item or not. Please kindly contact us via email first. Our team aims to review your email within 3 working days.
For other queries, the fastest way to contact us is via our website or Discord
Linsoul Audio will not be responsible for parcels that have been damaged during the transit process.
Do I get tracking details for my order?
After placing an order, you will receive the order confirmation email. After your order has been shipped out, you will also receive a tracking email. You can track your order via the tracking number online. Should you not have received the emails or face any difficulties tracking your order, please kindly contact us for support.
For more than 1 orders placed under the same account and shipping address, Linsoul will automatically combine the orders and ship them out via one tracking number. Should you have special requests to have the orders shipped separately, please kindly contact us via Discord or our website's chat. We will do our best to help.
What shipping companies do you use?
We collaborate with these courier companies:
Standard Shipping: 4PX, UBI, NinjaVan, and Yun Express
Express Shipping: DHL Express, FedEx and SF Express
Last updated: 1 November 2022
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Let customers speak for us4031 reviews
7HZ Salnotes Zero
Natural tuning with forward mids and great bass. It sounds more detailed and better than many more expensive iems out there. People who claim that all-BA iems cannot produce good bass should get this set. They may change their thinking. Last thing to add, the faceplate design is much more beautiful in reality.
It seem I am the only one who purchased this pair of IEMS, let me tell you something after 100 hours burn and the perfect tips (foam for me).
The sound is sublime, the right amount of bass and kick in the drums, voices forward, maybe to energetic in the upper mids but if you're using a warm signature DAC, you'll be fine and the highs fantastic, the percussions very rich and detailed.
The soundstage is kinda narrow but you can pinpoint the instruments.
Note: I use the Luxury and Precision W2 DAC (with some tweaks to fit my needs) and the 4.4 mm output with upgraded cable.
Personally, i find them perfect
Cable seems okay quality, its very nice and flexible but the twised wire is extremely uncomfortable on your ears, i dont reccomend this
We are sorry that our product did not satisfy you.
The Tripowin Grace adopts special braiding technique. It looks sophisticated but also elegant and neat in look. It feels soft and easily be stored without any tangling. The earhook is also pre-shaped into a best angle to fit your ear securely. You can wear it no matter you’re enjoying music quietly or doing sports.
But we're sorry this might not be for everyone's ears.
We are very grateful for your recognition of our products and suggestions. We've given feedback to the manufacturer to make cables that fit more people in the future.
If you encounter any problems in the future, we sincerely suggest that you contact us via email (support@Linsoul.com)at the first time,because we can solve your problems in a more comprehensive way.
Thank you for your support and understanding.
Very good for the price, comfortable to wear but ofc that is very subjective
Kiwi Ears Cadenza
Great bass (and lots of it) which is the point of this set but thanks too the extra DD, the rest of the frequency spectrum isn't left out and makes the 7Hz Legato more versatile.
For a but of context I mostly listen to metal and electronic stuff. It's good enough for the former and great for the latter.
For $15 you are getting a good sounding bullet style iem. Case is provided which is unusual at this price. Definitely worth a listen 👍...