Assemble LM4610 Audio Preamplifier Board With 3D Surround Equal Loudness Volume Tone Control

Specifications:

Working voltage: AC12V+12V

Product function: volume adjustment, treble adjustment, bass adjustment, left and right balance adjustment, 3D sound effect, equal loudness compensation

Pre-amp gain: 3 times, DIYers can also adjust it according to the actual situation, just change the parameters of the two resistors on the board

PCB size: 167×51MM

The circuit board is a 2.0MM thick glass fiber board, the copper foil thickness is 2 oz (2 times that of the ordinary board),and the CBB capacitor is produced by Siemens in Germany. Electrolytic capacitors are made in Japan with high speed and low resistance.

The recommended transformer power is 15W, and the output AC voltage is 12V~0~12V.

Product Details:

The power supply adopts high-speed DC servo voltage regulator circuit, the rectifier tube uses FR204 high-speed tube, the filter capacitor uses GSK high-speed low-resistance capacitor, and uses multiple capacitors in parallel, which is beneficial to reduce capacitor ESR and improve power supply quality. A NE5532 is used as DC Servo, reducing power ripple. Use LM7812 and LM7912 regulator.

Small sealed potentiometers from famous Taiwanese manufacturers are used, and MTK axial audio capacitors are used in the audio channel, so that the loss during signal transmission is smaller.

The resistance on the board adopts the original Japanese metal film resistance, pure copper feet, the diameter of the feet is 0.55MM, the error is 1%, the pre-amplifier is N5532, and it is equipped with an IC seat, which is convenient for DIY to upgrade the IC.

LM4610N integrated circuit imported