Size: 121mm * 108mm * 35mm

Job type: Single-ended Class A

Operating voltage: AC 12V-0V-12V

Frequency characteristics: 12Hz ~ 50KHz (+ 0dB, -1dB)

12Hz ~ 120KHz (+ 0dB, -3dB)

Voltage gain: 21dB

SNR:> 101dB

Conversion Rate:> 35V / μS

Quiescent Current: 240mA

Plot:

In 1969, the British engineer tiger Germany (John Linsley Hood) in the "Radio World" published the famous JLH single-ended

Class A power amplifiers, with its simple circuitry to obtain an excellent sense of hearing, for a time resounded through the

north and south, audio imitators countless.The figure is a single-ended Class A power amplifiers to JLH minor changes based

on the CPI and the headphone amplifier circuit diagram, achieved satisfactory results.

Introduction:

Circuit is simple, Base on the famous GRADO RA1 circuit, use AC power supply, on board rectifier filter regulator circuit, array capacitor, low internal resistance.using JRC4556AD opamp.

Equipped with 12pcs 330uF capacitors, imported ST LM7815-7915 regulator, 718 Military Resistors, Philips small capacitor, the sound of sweet MKP 4U7 coupling capacitor.PCB Size: 100mm*75mm Input voltage: AC 15V--0--15V

NOTE: We have PCB or DIY kit or finished board (Optional) ◆ PCB ---- Bare board PCB without any parts. ◆ DIY kit ---- All parts need you to solder and test it. ◆ Finished board ---- All parts have been welded and tested OK.