Portable Audio & Video

TIANCOOLKEI JRC4580DD 4 opamp DIY Professional headphone amplifier board Sound quality is better than lehmann SOLO headphone amp


TIANCOOLKEI design of the listening class headphone amplifier. Input voltage AC220V Voltage gain 4 times headphone amplifier :TND+N Distortion plus noise is less than 0.006% Maximum output voltage + -11.5V The frequency range 1HZ- HZ + 100K 0.5DB (20HZ-20K HZ + 0.1DB) headphone amplifier Maximum output power of 1.5 W *2. Size:Wide 116MM, high 50MM, long 138 MM headphone amplifier Output with DC protection, boot delay start. It can also be used as a pure post amplifier when the preamp Audio signal amplifier is used Any buyers of HA-PRO2 products, there is no effect on the feeling of this amp is not satisfactory. HA-PRO2 headphone amplifier circuit designed by the LJM itself, and no one is similar to the circuit. Also did not adopt any of the so-called tonic, fever parts, nor any expensive op amp. This amp used a total of 4 JRC4580DD opamp amplifier. HA-PRO2 from the performance and the sense of hearing can be comprehensive than Is better than the so-called imitation lehmann circuit class A headphone amplifier. Products include: Headphone Amplifier 1pcs Audio line 1pCS Power cord 1pcs 6.5mm turn 3.5MM headphone plug 1pcs

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* If you have any request please don\'t hesitate to contact us at first time,we will help you and solve your issue within 24 hours.

* All emails will be answered within 1 business day. If you do not receive our reply, please kindly re-sent your email and we will reply you as soon as possible.

* Warranty services are for replacements only,any problem please kindly email us frist,we will accept your advise & request.


1. We can accept T/T ,Escrow and Western Union and Money Order,the best way is direct online payment,you can choose yourself. If you want other payment terms please let us konw before when you order.

If you have bought multiple items from me, you can send me one payment for all the items instead of paying for them individually. When you click the Pay Now button, the system will automatically determine if there are other items you have purchased from us and will combine them for your review.

2. Full payment must be made within 7 days after placing your order, or the order will be invalid or canceled by the system.

3. Make sure that you have completed all the detailed information like contact person,address,post code and telephone number when filling in your buyer information.


1. If the payment is not available, your order will be closed automatically.

2. Seller are responsible for any insurance ,problems and damage which caused by shipping service such accidents, delays or other issues. Besides the buyer should to be responsible for any tax and/or duty charged by their country. And the goods will be Marked as "gift" or "sample" for your easy customs clearance and less charge. (if you want to declare the goods as other item name, or specify an value for custom, please inform us when making the order)

If you refuse to pay the tariff is equal to discard the order goods. The resulting dispute funds not refundable


1. All the goods are inspected before shipment. so if you are not satisfied with the purchase, you can exchange the items in one week and you must contact us within 24 hours of the receipt of your purchase.Please contact us before open dispute, we can refund you.

2. The shipping and handling charge is not refundable and customer should be responsible for all the charges of returning and reshipping. 3. All return items must be in its original conditions, including box and accessories. cause defects are not guaranteed, such as broken, scratched and so on ( No refund ) 4. For any items,please send by EMS or your local post when send back. Feadback: 1. Buyer\'s early confirmation will be highly appreciated after receiving the items. 2. Since your feedback is very important to our business\'s development, we sincerely invite you to leave positive feedback for us if you are satisfied with our product and service. It\'ll just take you 1 minute,but this 1 minute has the extremely vital significance to us. 3. Please contact us before leaving any negative or neutral feedback. We will work with you to solve any problems.Thank you for your understanding!

  • Signal To Noise Ratio: 96
  • Type: Professional Amplifier
  • Operational Amplifier Chips Model: JRC4580DD
  • Recommended Headphone Maximum Impedance: 251-300 Ohm
  • Bluetooth: No
  • Body Material: Metal
  • Brand Name: TIANCOOLKEI
  • DAC Model: NO
  • Input Type: rca
  • Output Power: 1.5w
  • Built-in Battery: No
  • Output Type: 6.5mm
  • Package: no
  • WIFI: No
  • Model Number: RC4580DD
  • PCM: No
  • Channels: 2 (2.0)
  • DSD (Direct Stream Digital): No
  • Dimensions (WxHxD): Wide 116MM, high 50MM, long 138 MM

  • Unit Type: piece
  • Package Size: 20cm x 16cm x 6cm (7.87in x 6.30in x 2.36in)
  • Package Weight: 0.8kg (1.76lb.)