1 Pair E405 Gold Sealed Tube Pure Final Stage HIFI fever Power Amplifier Board

Description: 1 Pair E405 Gold Sealed Tube Pure Final Stage HIFI fever Power Amplifier Board E405 sound features: natural slender, wide sound, great dynamic effects, the biggest feature is the deep bass diving. Feature: 1. Use original Anson MJ15024G/MJ15025G and Toshiba 2SA1930/2SC5171. 2. The interstage coupling capacitor uses WIMA top capacitor 1UF, the sound is natural, and the sound field is wide. 3. The n-resistance uses a five-ring metal resistor. The main circuit uses a five-ring metal film resistor with an accuracy of ±1% to ensure a good signal-to-noise ratio. 4. PCB adopts 1.6mm thick double-sided sheet, 2.0 oz copper thickness, spray tin full process to ensure good passing performance of large and small current 5. The biggest feature of this board is the use of the current advanced C1237 BTL speaker protection circuit, which effectively eliminates the impact sound and DC output protection function of the open and shutdown, making your speaker safer. 6. The layout of the entire circuit board is quite rigorous and reasonable. The overall PCB trace is grounded at one point. The power amplifier board works stably and reliably, and the output power is large; the sound is beautiful and round, and the sound field is wide. The three-dimensional sense is strong, the low frequency is solid and solid, the signal-to-noise ratio is quite excellent, the dynamic range is wide, the details are clear, the transient response is excellent, and all kinds of music are played comfortably. It has a very good performance in the family's playback environment. Parameters: 1. Power supply: DC+-(35V-55V) recommended +-45V Note: Each board AC12V power supply is independently powered. 2. Power: 200 watts (total harmonic distortion THD+N<0.1%), DC+-45V, 4 ohms 3. Class A 60W, measured under 4 ohm load 4. Speaker impedance: 4-8 ohms. 5. Board size: 105*236MM. 6. Adjust the differential input stage current to 2MA: Adjust the VR1 (500R) adjustable resistor so that the voltage at C and D is 1.5-2V (that is, the voltage across the R9 (1K) resistor); the input differential current is 1.5- 2MA, this value is the best sound quality 7. The quiescent current of the large tube is 100MA: Adjust the adjustable resistance VR2 (1K) so that the voltage of the two points A and B is 22MV. At this time, the quiescent current I=22MV/0.22R resistance is 100MA; if the customer heat sink is large enough, it can make Increase the quiescent current, generally 100MA-300MA sound effect is best. 8. Weight: 0.5KG+0.5KG Package: One Pair E405 Gold Sealed Tube Pure Final Stage HIFI fever Power Amplifier Board Payment Method: PayPal preferred Shippment: 1.We provide free shipping to international via China Post Airmail, and every parcel will be registered with tracking number. We can also ship by UPS/EMS/DHL/FedEx for alternative shipping method for corresponding fees. Please let us know before payment if you need split shipment. 2.International shipping requires complicated shipping procedures (such as both countries customs, transit stations etc.), also will be affected by many factors, such as holidays, weather conditions etc, If you have not received your shipment within 30 days from payment, please contact us. 3.Time of Delivery:Based on the China Post Airmail and our experience, kindly please be noted that To United States / United Kingdom / Australia, it takes around 10-15 business days; To Canada, it takes around 12-18 business days; To Brazil / South America, it takes around 25-35 business days. To Italy / France / Spain / Germany/ Eastern Europe, it takes aournd 15-20 business days. Returns & Replacements & Repair: We accept returns & replacements within 30 days from the day the customer receive the products, please make first contact within 30 days from receiving the order. Products should be returned in original condition. As a benefit to our customers, we also provide repair within 3 months from the day when this item is shipped out, after repair is done, we will send you the item, but the customer should pay both shipping ways. Feedback: 1)Your Feedback is really important to us, please take a few seconds to leave great feedback if you are satisfied with our product or service, thank you so much !! 2)We always offer the lowest price for best goods and service to you. 3) Please contact us before leaving neutral(3 stars) or negative(1-2 stars) feedback.We will try our best to solve the problem and leave you a happy shopping mood here. Thank you!

Price: 221.37 USD

Location: Wuhan

End Time: 2024-11-26T02:12:15.000Z

Shipping Cost: 10 USD