TONE CONTROL AND SUBWOOFER OUT

  
PT2350 is a tone control subwoofer cross-over low pass filter chip utilizing CMOS Technology. It features a tone control range of + 10dB (50Hz, 4 KHz) and subwoofer low pass filter of the second order Sallen Key Design. The roll-off point can be adjusted by changing the value of the external capacitor. Pin assignments and application circuits are optimized for easy PCB Layout and cost saving advantages.
TONE CONTROL AND SUBWOOFER OUT - schematic

2-Channel Input 3-Channel Output (Including 1 stereo Output and Subwoofer Output) Low Total Harmonic Distortion (THD<0.01%, Subwoofer THD<0.2%) High S/N Ratio (S/N Ratio <-87dB, A-weighting) Least External Components Adjustment of Frequency response by changing the value of the external component Single Power Supply: 3 to 8.5 Volts Available in 20 pins, DIP or SO Package if you make one stereo input device you need 5 pcs of RCA female as listed in parts list If you make 2 x 6 input device, you need total quantity of 15 pcs RCA female and also 2 x 6 changeover switch. Code of J2 to J18 RCA female to PCB, straight, Hosiden, any colour SW1 2 x 6 changeover High quality DIP rotary switch to PCB 2 x 6, Alcos witch DRS 2-6, 3.2mm saft Frequency response of tone control unit is flat between 20 Hz 20 kHz when treble and bass pots are in middle. Overall gain is approx. 6 dB when treble and bass pots are in middle. Treble and bass tone control range is approx. 10 dB (50Hz / 4 kHz) with given component values. Subwoofer cut off frequency can be adjusted by bass potentiometer with component values as listed above it is as follows : bass pot in minimum (left) -3dB point, 240 Hz / -12dB 450 Hz, bass pot (middle) -3dB point 100 Hz /-12dB 200 Hz, bass pot maximum (right) -3dB point 60 Hz / -12dB 120 Hz. Distortion was < 0.1 % when input level was < 0.3V rms. There is no balance adjustment potentiometer in this...



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