Fosi Audio BT20A – 2 Channel Bluetooth 5.0 Stereo Class D Amplifier for Home Audio System


The Fosi Audio team is dedicated to bringing you the highest-quality listening experience.

Made In: China

Supplier: Fosi Audio SKU: BT20A Categories: , , Tags: , More From:

Fosi Audio BT20A – 2 Channel Bluetooth 5.0 Stereo Class D Amplifier for Home Audio System

Welcome to the Fosi Audio family, and congratulations on purchasing the Fosi Audio products. The Fosi Audio team is dedicated to bringing you the highest-quality listening experience. The Fosi Audio converters were designed with attention to detail and operational simplicity as all other Fosi Audio products. We aim to get you to your music as simply as possible without all the “gadget tinkering” many other products require.

  • 100W Max X 2(4 ohms, 20 Hz – 20 kHz, 0.04% THD), comes with a 24V power supply, can drive 280watts(8 ohms), 320watts(4 ohms) speakers (For passive speakers only, not the powered speakers.)
  • Advanced circuitry design, built-in speakers protection circuit, best for bookshelf/computer/desktop/speakers in your home;
  • Home integrated digital amplifier, 18-month warranty; you can return the item if you have any problems;
  • Small, simple, compact design but practical and powerful, Hi-Fi Bluetooth amplifier exclusively designed for customers who pursue HiFi sound;
  • Bluetooth 5.0 core, up to 33ft connection range guarantees low signal delay. There is no pop or audible noise when a Bluetooth connection is established.

Product Advantages

  1. Adopt the QCC3003 Bluetooth 5.0 chip that improves the sound quality.
  2. Extraordinary Clarity Hi-Fi Sound. Instant setup with phones, tablets, and almost any other Bluetooth-enabled device. The CSR64215 chip ensures your devices maintain a robust and stable connection up to 50 Feet away for skip-free music.
  3. Advanced Audio ArchitectureThe High-Performance Texas Instruments TPA3116D2 Chip presents rousing highs and deep lows. Less than 0.04% harmonic distortion at high volumes results in remarkable clarity.
  4. Irresistible Finish
  5. Fosi Audio BT20A’s curved edges and sleek controls accentuate its unibody design with advantageous features and thoughtfully designed premium enclosures.
  6. Drive passive speakers
  7. Perfect if you prefer separate passive speakers and preamps for your Audio setup. 100-watt per channel power output can drive most home passive speakers to create great Sound. Easy to fit your audio system with Bluetooth and RCA input
  8. The upgraded DC outlet sparks when the power supply is plugged in.
  9. 24V/4.5A Power Supply
  10. Unlike other amplifiers, they come with a cheap 12V power supply. As a result, the Fosi Audio BT20A, equipped with an energy-efficient, stable power supply, which got authoritative certification by many security tests, can get an astonishing sound.


  • Power supply range: 12v-25v;
  • THD: ≤ 0.5%.
  • Frequency Range: 20Hz – 20kHz (±1 dB);
  • SNR: ≥ 98dB;
  • Input sensitivity: ≤ 280mV;
  • Bluetooth transmission distance: 28ft;
  • Terminating impedance: 2Ohm – 8Ohm;
  • Output power: 100W + 100W;
  • Input mode: Bluetooth and Analog;
  • Bluetooth Name: Fosi Audio
  • Bluetooth chip: Qualcomm QCC3003
  • Power supply: 24V 4.5A
  • Supplied Accessories: Amplifier, Power supply, AC power cord, Manual.

Product Datasheet and Manual

If applicable, the Product Documentation such as Datasheet, Brochure, Reference Materials, CAD Design, STP Files, Manuals, and Tutorials will be available for download upon purchase from the My Account as needed. On the checkout page, please create an account to download product-related files upon purchase. You won’t be able to download otherwise.


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Fosi Audio is a brand specializing in the design, manufacture, and sale of hi-fi products. With experience in researching and developing countless HiFi home audio amplifiers of different types.

Fosi Audio places great importance on users’ needs and is committed to making great-sounding products that make people want to listen to music every day, to supply users with the best audio products and the best prices. We pursue your perfect music journey and become your HiFi home audio amplifier expert.

Enjoy Hi-Fi music with Fosi Audio audio products NOW!

Shipping Policy

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WE SHIP WORLDWIDE: We primarily ship via FedEx, UPS, DHL, and USPS because they’re reliable, fast, and easily trackable. We usually ship within two to three business days after the full payment. Standard delivery generally occurs within 5 to 7 business days after the shipping date. However, the delivery may take about 7 to 10 business days, depending on the shipping destination, logistics, weather conditions, product weight, size, or shipping company distribution structures.

SHIPPING COSTS: For some industrial products, e.g., heavy wheels, CNC machines, etc., the shipping cost is calculated based on the product weight, not quantity. To benefit from lower shipping costs for orders with multiple items, please contact us at Our shipping rates are listed clearly on each product page under the SHIPPING tab. Additionally, to see the shipping cost for your country, add the item to the Shopping Cart; you will see the shipping cost based on your Country and Location.

CUSTOMS and TARIFFS: While not all products require a tariff, some products may require a minimal tariff if applicable in your country. The total amount for your order does not include a customs fee/tariff. A tariff belongs to the buyer when applicable. Why don't we add tariffs to the product's retail price? - If all countries deducted the same tariff amount, we would have added the tariff amount to the product price. However, we do not do that because each country charges a different amount, while some do not even charge. Therefore, we can't add any tariff to the product's retail pricing. Oz Robotics, manufacturing partners, or Suppliers are not responsible for tariffs. Please check the "Made In:" and "Brand:" labels on the product page to see the product's origin. The total amount for your order does not include any duties, import taxes, customs fees, and GST/VAT. The buyer must pay all import duties. If you choose not to pay the tariff and parcel returns, there will not be any refund. Please click here to see more on Tariffs.

Return Policy

WITHIN 5 HOURS: Mistakes happen when ordering, so you have 5 hours to request an order cancellation, but even within 5 Hours, we still cannot refund the PayPal or Stripe Processing fee because they do not refund us. After 5 hours, your order has either been shipped, prepared to ship, or custom-made. Therefore, we cannot accept your cancellation request after this period has passed.

AFTER 5 HOURS: If you want to cancel your order after 5 Hours, we will deduct 30% of the total for restocking + PayPal or Stripe processing fees and the Return Shipping cost for unopened packages.

AFTER RECEIVING YOUR ORDER: If you decide not to keep your order after it arrives, we will deduct 70% of the total + the shipping fee if we find it refundable after a review. Please see our Refund and Replacement Policy

EXCHANGE POLICY: Oz Robotics wants you to be happy with your new purchase. However, we abide by the exchange policy of our suppliers because we do not manufacture these products; our suppliers do. Once you use the product, our supplier(s) and we have the right not to issue a refund. Still, we will offer an exchange for wrongly purchased items or products with serious and irreversible defects or technical problem(s). The buyer will pay the shipping fee for wrongly purchased products or similar issues. If the product you purchased is defective, please email us at with photos or a video of the defective parts to evaluate before you send it. Click HERE for more on Refund and Replacement Policy

REFUND POLICY: Oz Robotics accepts refunds on a minimal basis unless there is a manufacturing defect. For electronic items, returns are only accepted on devices with serious and irreversible problems; meanwhile, the customer must apply for the returns within seven days of delivery. Before a refund acceptance, please include images or a video and any other proof of the defect. However, we abide by the exchange policy of our suppliers because we do not manufacture these products. For more info please visit Refund and Replacement Policy.

Other than our supplier's default policy, once a return is agreed upon, you can ship your defective item to the provided return address that you should receive from us first. Please ship the order in original packaging with all the accessories and additional parts. If the Required Parts are not sent back, they will be billed for or expected to be shipped later. And only once all items have arrived will our staff check the returned product for testing. Include in your package a signed letter stating the reason for your return, the original receipt, proof of defect, images, a video, etc. It will help us to speed up the process on your behalf.

The purchaser (customer/buyer) is responsible for all shipping costs when returning an item. However, upon receiving the returned order, we will assess the product. If it is determined that there is, in fact, a manufacturing defect, then we will refund the shipping costs as well as repair or replace or refund the full amount to the purchaser if the product is not fixable.

If you wish to return an unused product, please do so within seven days from the ship date for a refund on the purchase price minus shipping and handling. Refunds will be credited to the original credit card used for payment 24-48 HOURS after receiving the product back. We will charge a 30% of the total for restocking + PayPal or Stripe processing fees and the Return Shipping cost for unopened packages.

Once your return is received and inspected, and if you agree to a refund, refunds will be credited to the original credit card used for payment in 24-48 hours. Please note that we will charge a 70% restocking fee once you return a product without any defect.

Once your refund is processed, PayPal will return the money to the card used. It may take at least five business days (depending on the bank and credit company) before your refund is posted in your bank account and statements. Contact Us if you have not received your refund after five business days.

Do not return your product to our New York office. For any exchange or refunds, please email us first at for us to provide you with the steps that need to be followed. Any product you return must be in the same condition you received and returned in the original packaging without being used. Please keep the original receipt. More on Refund and Replacement Policy.

Shipping costs

Region / Country State Postcode Cost
United States (US) Any Any Free shipping
Any Any Any Free shipping