Check the listing for details. 1pc A3 Class A tone board Japanese original JRC5532 finished board. Color: A3 Class A tone board Japanese original JRC5532 finished board, Condition: New. Listed at 35.14 USD. 1111MicrosoftInternetExplorer402DocumentNotSpecified7.8 磅Normal0 1111MicrosoftInternetExplorer402DocumentNotSpecified7.8 磅Normal0 1111MicrosoftInternetExplorer402DocumentNotSpecified7.8 磅Normal0 1pc A3 Class A tone board original from Japan JRC5532 finished board Basic parameters:PCB size: 140*66MMSupply voltage: AC12V-0-AC12V (filter capacitor is 16V withstand voltage)Potentiometer from left to right: treble adjustment --- midrange adjustment --- bass adjustment --- master volume control Product Details:Using the original Japanese JRC5532.Main filter capacitor using imported audiophile ELNA capacity of 3300UF * 4, using 2A and above rectification, to ensure a strong source of power hold.Resistor selection of five-ring metal resistor, the main circuit using the accuracy of ± 1% of the five-ring metal film resistor, to ensure a good signal-to-noise ratio of the whole machine.PCB using 1.6mm thick double-sided plate, 2.0 ounce copper thickness, spray tin full process, to ensure the size of the current good through performance. The PCB quality.The use of fully enclosed dustproof potentiometer, more stable performance, more durable than ordinary potentiometer.Class A parallel-adjusted regulated power supply with high speed, low noise, low internal resistance. In terms of noise, music detail and sense of extension, etc., are incomparable to series-connected regulated power supply. Series-connected regulated power supply for dynamic loads is not as good as parallel, because the series-connected power supply no-load adjusting tube conduction degree is very low, close to class B, for dynamic loads to accelerate from 0 to 60mA, parallel power supply constant current source has been a large current to adjust the tube, working in class A, for dynamic loads only from 30mA to accelerate to 90mA, the two reflect the speed is certainly not the same. The entire circuit board alignment layout is quite rigorous and reasonable, the overall PCB alignment using a point grounding method. Stable and reliable work, low-frequency stable and solid and powerful, signal-to-noise ratio is quite excellent, wide dynamic range; clear details, excellent transient response, play a variety of music are coping with ease, in the home of the playback environment has a very good performance.This board with a tweeter, midrange, straight through switch Package:1pc A3 Class A tone board Japan original JRC5532 finished board. 1111MicrosoftInternetExplorer402DocumentNotSpecified7.8 磅Normal0 Payment Method: PayPal preferred Shippment:We provide free shipping to international via China Post Airmail. We can also ship by TNT/EMS/DHL/FedEx for alternative shipping method for corresponding fees. Please let us know before payment if you need split shipment. 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: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!