Check the listing for details. 1pc HA-PRO2 headphone amp finished board, ultra-low noise, low distortion. Condition: New. Listed at 23.27 USD. 1pc HA-PRO2 headphone amp finished board low distortion AMP Parameter : Op-amp using Japan JRC 4580D audio-specific op-amp, a total of four dual op-amps. Recommended for voltage input. Or on the switch, connect 275V104 capacitor in parallel. Reduce switching noise interference. Can be used with online E3 chassis. Can also be used with our ear amplifier dedicated chassis. Compatible with ALPS 27 potentiometer. Recommended potentiometer resistance value 10-30K ohms PCB size: 107.5mm * 60mm (L * W) Supply voltage requirement AC12- 0- AC12. Output voltage range + -11V Output current maximum + - 150MA Minimum load impedance 8 ohms Input Impedance 3K Voltage Gain VOLTAGE GAIN=4.5 times Input Sensitivity = 2.3V Frequency response = 10HZ-21KHZ + - 0.01 DB Package: 1pc HA-PRO2 headphone amp 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!