Delicate and soft Hifi Class A headphone amplifier Kit with protection circuit

Description: DIY KIT: will need yourself to solder all parts Assembled board: we will soder and tested it well. PCB Size: 160mm*110mmX1.6mm Works Voltage: recommend AC15V-0-AC15V Basic parameters Input impedance 47 ohms Gain: 10dB Frequency Response 10Hz (-0.3 dB) to 35 kHz (-1 dB) SNR> 95 dB at 0 dB gain (analogue) THD <0.001% at 6 mW / 300 ohms Channel Separation> 90 dB / 10 kHz Output power 200mW / 300 ohm, 400mW / 60 ohms HV-4, based on the circuit of the lehmann headphone amplifier, was developed for the purpose of creating high-quality products. Highlights: 1, Optimize the power supply, the original machine use LM3X7 rectifier filter supply ripple 3-5MV, the voltage amplifier stage and input stage uses electronic filter circuit, the ripple is 7MV lThis amp ower ripple of the DC stable circuit audience,This amp using stability of DC circuit full-powered, lower ripple 390UV. 2,Parallel cross-emitter follower circuit to improve driving force and control force, wide sound field and higher resolution; 3, 300MV headphones for the protection circuit. 4, Omron power relays have larger contacts and copper sheets than small signal relays, with lower signal loss 5. Use TI-JET single op amp TL 081. ST DB139-140 power triode output. Original Japan ALPS 27 Type Potentiometer 6. Optimized ground processing, higher signal-to-noise ratio Package include: HV-4 Class A Headphone amplifier kit ( board ) X 1 (inlcude the ALPS Potentiometer) The suitable power transformer link : https://www.ebay.com/itm/325306923969

Price: 36 USD

Location: FOSHAN

End Time: 2025-01-16T14:46:54.000Z

Shipping Cost: 12 USD