SRS patent bass processing integrated circuit NJM2192AL
TRUBASS true bass processing technology
Effectively boosts the volume in the sound system
Far better than the subwoofer line made up of op amps
Can work in 2.0 (no subwoofer) or 2.1 (with subwoofer) mode
Subwoofer cut-off frequency is adjustable (SW1, SW2), smooth with the original main speaker
Audio output 3 modes (MODE1, MODE2)
Bass output frequency adjustable (GAIN, potentiometer)
2.0 (no subwoofer) output has 3 modes: see the picture below
a, through output mode
b, subwoofer boost mode
c, pure bass output mode
Supply voltage: AC12V*1 5W
Plate size: 83*83
a: pass-through mode; b: subwoofer boost mode; c: pure bass output mode.
Description of the on-board switch:
According to the size of the original speaker bass, the cutoff frequency of the board's bass adjustment can be adjusted (refer to the PDF curve):
LARGE: Large size (12-15 inches);
MEDIUM: medium size (10-12 inches);
SMALL: Small size (6-8 inches).
![](https://img.alicdn.com/imgextra/i3/20630408/O1CN01AgR8zX1Esu6wOuHZ9_20630408.png)
Waveform measurement:
Maximum input Vp-p: 5.752V, effective value 2V;
Maximum undistorted output: RMS value 3.5V, direct drive rear stage power amplifier;
![](https://img.alicdn.com/imgextra/i3/20630408/O1CN01sV4uxy1Esu6zNaJhu_20630408.jpg)
As a subwoofer, the UPC1342V is very good (8-10 inches)