Product Details:
This product circuit refers to Lehmann earphone amplifier, a well-known earphone amplifier, is known as the best partner of sennheiser HD650. It has a good reputation in European and American sound exhibition and professional audio studios. The amplifier comes with a two-channel 6.35mm headphone output port. With 300 ohm headphones, the output power is 200mW. With 60 ohm headphones, the output power is 400mW. The frequency response range is between 10Hz and 35kHz, and the signal-to-noise ratio is above 95dB. The excellent sound quality is well received in the industry.
Use UK Talema toroidal transformers or Multicomp pro (NORATEL) toroidal transformers.
Use Philips BC 4700uF/40V main filter capacitor.
Use Neutrik 6.35 headphone output terminal.
Use Japanese ALPS RK27 potentiometer.
Use Nippon Chemical LXZ high frequency low resistance capacitors.
Use TI's OPA2134PA op amp.
Use American CMC oxygen-free copper RCA terminals.
Specifications:
Frequency response: 10Hz (-0.3dB) -35KHz (-1dB)
Adaptation impedance: 8Ω~2KΩ
Distortion: <0.001% (6mW / 300 ohms)
Output power: 300 ohms / 200mW, 60 ohms / 400mW
Input impedance: 47K ohms
Input interface: RCA
Output interface: 6.3mm interface × 2
Dimensions: 114*46*297MM
Package list:
1 × Finished Headphone Amplifier
Note: AC power cord not included
