TOPPING A90 Amplifier
TOPPING A90 Amplifier has got four built-in NFCA discrete modules, each of them featuring 39 transistors building up a fully balanced structure. With this discrete component circuitry, the A90 Discrete packs a tremendously powerful output producing about 9800mW of clean, noise-free output ratings at 16Ω of load.
Features:
NFCA-Discrete Modules:
TOPPING A90 Discrete houses four NFCA-Discrete modules that adopt 39 transistors building up a fully-balanced circuitry producing powerful amplification to the supplied signal. This discrete structure is supported by optimized Voltage Current hybrid feedback architecture along with UHGF(Ultra-High Gain Feedback) technology providing excellent DC and AC performance.
Balanced & Single-Ended Headphone Connections:
Topping A90 Discrete houses three headphone output ports. It supports both single-ended as well as balanced headphone connections with a 4-pin XLR and 4.4mm Balanced connections and a 6.35mm single-ended connection.
Ground Loop Noise Eliminator:
The ground loop might introduce some unwanted noise into the output signal that might ruin the experience for users. Topping A90 Discrete has got a GND/LIFT switch to rectify this problem.
Super-Clean Performance:
Topping A90 Discrete is a highly-powerful headphone amplifier. It maintains ultra-low distortion even at its peak load. Talking about the specs here, Topping A90 achieves <0.1% THD+N at 6700mW of peak power at 32Ω of load. Pairing 300Ω headphones, it maintains an ultra-low distortion of <0.00003% at 950mW of load.
Shipping Options
| Shipping Options | Cost | Shipping Time |
| Priority Air Mail | Budget shipping cost | 10 – 15 days |
| Express (DHL/UPS/FedEx) | Base on location | 5 - 10 days |
Please refer to shipping estimate when you confirm your order.
You may choose standard shipping or express shipping depending on the items in your order and your location. As your orders may be handed over to local carriers for the final leg of delivery, tracking may not be available every step of the way.
Shipping address
Please make sure that you have provided the correct and current address for shipping and delivery. You may use P.O. boxes as your shipping address. But certain items can only be delivered to physical addresses. Large products, valuables, perishables, products with age-based restrictions, or items shipped via private carriers may require a physical mailing address or signature confirmation to be successfully delivered. Items cannot be delivered to security-restricted areas such as military bases.
Shipping time and cost
1) After an order has been successfully paid and confirmed, you will see the estimated delivery time and cost for shipping on your order confirmation page. You will also receive an order confirmation message that will outline the estimated processing time for your order.
2) The warehouse may take 1-3 days to process your order. You will receive a message once your order has been shipped.
3) You'll receive a shipment notification message that will provide you with the estimated delivery time for each package once it is shipped. We will also provide you the tracking number when it is ready. You can view this estimated delivery time under each package in your order history at the same time.
4) In most cases, your order will be delivered within the estimated time of delivery. However, the actual delivery date may be affected by flight arrangements, weather conditions, and other external factors. Please refer to the tracking information for the most up to date delivery date.
Issues regarding delivery
If your package has not been delivered or your tracking information shows that your package has been delivered but you have not received it, please contact our customer service immediately and within 30 days of the order date.