Lehmann Class A Headphone Amplifier LEM Preamplifier Kit/Board With Protection

Description: Introduction: ◆ Base on original Lehmann circuit, add earphone output protection circuit to protect your expensive earphones. ◆ The purple double-sided gold plated PCB has a very good process, and the gold plated process can effectively reduce the contact resistance. ◆ New and original German WIMA stepless capacitor, ERO decoupling capacitor, Nichicon KG 4700uFX2 large filter capacitor. Imported self recovery red fuse. ◆ ST brand new original BD139, BD140, F brand new original BC550, BC560. ◆ Use BB OPA2134PA original transport amplifier. ◆ The resistance adopts a new 718 military copper pin 5% metal film resistance. ◆ The volume potentiometer adopts the original Japanese ALPS-27 potentiometer and the Swiss Neutrik 6.35 headphone output block. ◆ PHILIPS BYV27 high-speed rectifier tube and ON LM317/337 linear voltage stabilizing j circuit are used. Compared with previous versions, the importance of power supply voltage stabilization is known. Parameters: Input voltage: AC 18V-0-18V Frequency response range: 10Hz-35kHz Adapting impedance: 8-2k ΩDistortion:<0.001% (6mW/300 Ω) Output power: 200mW/300 Ω, 400mW/60 Ω Input interface: Analog signal Output interface: 6.3mm interface × 2 and Analog preamplifier signal output. PCB Size: 150mm*105mm (Double-sided gold plated) NOTE: We have DIY kit or Finished board (Optional) ◆ DIY kit ---- All parts need you to solder and test it. ◆ Finished board ---- All parts have been welded and tested OK.

Price: 69.99 USD

Location: FOSHAN

End Time: 2025-01-09T08:55:14.000Z

Shipping Cost: 0 USD