This tone board uses 4*NE5532
Need to upgrade 2604 op amp can be purchased,
This board is compatible with JRC4558, AD827, OPA2604. Different opamps can be upgraded according to personal preferences, and the tone style is different.
This board has 4 5532, of which 2 are used as the sound effect beautification and amplification of the left and right channels, and the other 2 are composed of 4-stage low-pass filtering subwoofer output.
The frequency can be adjusted from 50HZ to 150HZ.
Potentiometer spacing, 20-20-20-20-30mm,
Voltage is AC double 12v to 18v,
Bluetooth module adopts version 4.2, with Bluetooth isolation power active noise reduction design, Bluetooth supports automatic startup back, high and bright, medium round, bass thick, very suitable for enthusiasts to modify DIY.
AC dual 12-15V is recommended.
Board size 124x55x25mm,Weight:100g
