Gold Sealed Tube Class A Parallel Power Amplification HIFI Preamp Circuit Board

Description: Gold Sealed Tube Class A Parallel Power Amplification HIFI Preamp Circuit Finished BoardsParameters:Model: JX-7Power Supply: AC2X15V-25V Class A RegulatorAmplification: Class ABandwidth: 5Hz-200KHz 士0.5dBTHD: <0.01%Comparison of this board's use of a regulated power supply with other power suppliesConventional Series Voltage Regulator SchematicPower supply V1 through the regulator Q1 for the load power supplyVoltage feedback part has many componentsAdvantage: high efficiency, suitable for larger current regulatorDisadvantages:1, the power supply side will seriously affect the sound2, slow, poor high-frequency responseCommon Class A Parallel Voltage Regulator Circuit Schematic DiagramThe power supply V1 is fed to the load by a constant current source.The voltage regulator circuit is connected in parallel with the loadAdvantage: Eliminates the influence of power supply on the sound.Disadvantages: The addition of low-speed devices such as TL431makes the voltage regulator circuit slower and the high-frequencyresponse deterioratesSchematic diagram of Class A regulated power supply used in previous stage boardsThe power supply V1 is fed to the load by a constant current source.Voltage regulator circuit in parallel with the loadMinimalist circuitry, no low-speed componentsAdvantages:High speed, excellent high frequency response.Transparent sound, excellent balance in all frequency bands.Package：1pc Gold Sealed Tube Class A Parallel Power Amplification HIFI Preamp Circuit Finished Boards 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: 82.44 USD

Location: Wuhan

End Time: 2024-09-07T08:01:34.000Z

Shipping Cost: 4 USD