Includes all taxes
The line is compatible with the preamp and the phono amplifier. The phono amplifier part can be controlled independently.
Solder the tested finished motherboard. To reach the finished machine, the customer needs to configure a transformer, potentiometer, connector, chassis...
The circuit diagram is derived from the Kondo (audionote) M77 model of 500,000 RMB.
Tube model 6X4 (ez90) one 12AY7 (6072) eight.
Please refer to the circuit diagram for the parameters of the transformer and other parts
In view of the current high mains power, the 9 filter resistors in the actual product are adjusted from 2k to 2.4k.
Adopt 2.4mm double-sided gold-plated PCB circuit board. Most of the resistors are DALE and Philips instrument-grade precision resistors.
The signal channels all use TRW and GOOD-ALL bakelite-sealed coupling capacitors, and the old gold-plated bladder seat.
Designed to independently turn off the phono-amp function, 4-way to the relay switching signal, reserved for self-adding choke play.
The size of the pcb board is 220x290x2.4mm. The board is marked with the screw mounting hole size.
The standard 430mm width chassis with 3 knobs on the front panel and the internal height of 7cm are suitable for installing this kit.
To reach the finished machine, the user needs to configure the electronic tube, transformer, connector, and casing...This store does not sell these items, and does not accept the final assembly business of the finished machine.
This product is aimed at users who have electronic technology and testing capabilities. For the safety of electricity and personal safety, this store has the right to refuse to sell or ship to customers who do not have electronic foundation and sound knowledge. Products are strictly tested and shipped. Users who purchase non-finished machines will have different installation techniques. DIY production Unsuccessful ones are not covered by our warranty, only technical consulting support is provided. The right to take the goods is the default of this statement.
User communication qq group (Tridonic Studio 251857533)







Payment Policy – BILLIONS BIRDS
At BILLIONS BIRDS, we are committed to providing a safe, secure, and seamless payment experience for our customers.
1. Accepted Payment Methods
We accept the following payment options:
Major Credit & Debit Cards (Visa, MasterCard, American Express)
Secure Online Payment Gateways (such as PayPal, Stripe, or other providers available at checkout)
Any additional payment methods displayed during checkout
All payments must be completed in full at the time of purchase.
2. Secure Transactions
All transactions are processed through encrypted and secure payment systems to protect your personal and financial information. We do not store your full payment details on our servers.
3. Currency
Prices are displayed in the currency indicated on the website. If you are purchasing from another country, your bank may apply currency conversion fees.
4. Order Confirmation
Once your payment has been successfully processed, you will receive an order confirmation email containing your purchase details.
5. Failed or Declined Payments
If your payment is declined, please verify your billing information or contact your bank. Orders will only be processed after successful payment confirmation.
6. Fraud Prevention
BILLIONS BIRDS reserves the right to cancel or refuse any order if fraud or unauthorised activity is suspected.
Delivery Policy – BILLIONS BIRDS
At BILLIONS BIRDS, we are dedicated to delivering your orders safely and efficiently.
1. Order Processing
All orders are processed within 1–3 business days after payment confirmation. Orders are not processed or shipped on weekends or public holidays.
2. Shipping Times
Estimated delivery times vary depending on your location:
Domestic Shipping: 3–7 business days
International Shipping: 7–15 business days
Please note that delivery times are estimates and may vary due to customs procedures, carrier delays, weather conditions, or other unforeseen circumstances.
3. Shipping Costs
Shipping fees are calculated at checkout based on your location and selected shipping method. Any customs duties, taxes, or import fees are the customer's responsibility.
4. Tracking Information
Once your order has been shipped, you will receive a confirmation email with tracking details (if available) so you can monitor your package.
5. Delivery Issues
If your order is delayed, lost, or arrives damaged, please contact us within 7 days of the expected delivery date. We will work with the shipping carrier to resolve the issue as quickly as possible.
6. Incorrect Shipping Information
Customers are responsible for providing accurate shipping details at checkout. BILLIONS BIRDS is not responsible for orders shipped to incorrect addresses provided by the customer.
Refund Policy – BILLIONS BIRDS
At BILLIONS BIRDS, customer satisfaction is our top priority. If you are not completely satisfied with your purchase, we’re here to help.
1. Return Eligibility
You may request a return within 14 days of receiving your order. To qualify for a return:
The item must be unused, unworn, and in the same condition as received.
The item must be in its original packaging.
Proof of purchase (order confirmation or receipt) is required.
Certain items may not be eligible for return, including clearance items, gift cards, or personalised/custom products.
2. Non-Refundable Items
The following items are non-refundable:
Final sale or discounted items
Gift cards
Items damaged due to misuse, negligence, or improper care
3. Return Process
To initiate a return, please contact our customer support team with your order number and reason for return. If your return is approved, you will receive instructions for returning the item.
Unless the item is defective or incorrect, customers are responsible for return shipping costs.
4. Refund Processing
Once we receive and inspect your returned item:
We will notify you of the approval or rejection of your refund.
If approved, the refund will be issued to your original payment method within 5–10 business days.
Please note that banks or payment providers may require additional time to process refunds.
5. Damaged or Incorrect Items
If you receive a damaged, defective, or incorrect item, please contact us within 7 days of delivery and provide clear photos of the product and packaging. We will arrange a replacement or full refund at no additional cost.
6. Late or Missing Refunds
If you have not received your refund:
Check your bank account again.
Contact your credit card company or payment provider.
If the issue persists, don't hesitate to contact our support team for assistance.
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