带低音增强的立体声前置放大器电路 (Stereo Prea

gh Quality, simple design 20 to 30V supply

Parts:

P1_________________10K Log.Potentiometer (Dual-gang for stereo)Technical data (30V supply):

Gain @ 1KHz: 4

Max. input voltage @ 50Hz: 500mV RMS (280mV RMS @ 20V supply)
Max. input voltage @ 100Hz: 700mV RMS (460mV RMS @ 20V supply)

Max. output voltage: 8V RMS (5V RMS @ 20V supply)

Max. bass-boost referred to 1KHz: 400Hz = +2dB; 200Hz = +5dB; 100Hz = +10dB; 50Hz = +14dB; 30Hz = +16dB

Total harmonic distortion @ 100Hz and 1V RMS output: 0.02%
Total harmonic distortion @ 1KHz and 1V RMS output: 0.006%
Total harmonic distortion @10KHz and 1V RMS output: 0.007%

Total harmonic distortion @ 100Hz and 5V RMS output: 0.02%
Total harmonic distortion @ 1KHz and 5V RMS output: 0.0013%
Total harmonic distortion @10KHz and 5V RMS output: 0.005%

Current drawing: 2mA