This is the circuit diagram of stereo preamplifier which built based a compact IC TDA1524A. Tone control circuit module is included in this preamplifier circuit, so you can connect the output channels directly to stereo power audio amplifier circuit.

Components List

Circuit Features:

• Simple construction
• Few external components
• Low noise and distortion
• Switchable loudness
• Will drive most power amplifier

Pre-amplifier Specifications:

• D.C. Input : 15V DC supply or 12V battery at 50 mA.
• Gain 20 dB max.
• Maximum output : > 3 V RMS
• Maximum input : > 300 mV, G = 20 dB  ; > 3V RMS, G = 0dB
• Input: Z > 10 k ohm
• Output: Z < 300 ohm
• Frequency resp. : < 10 Hz to > 50 kHz  ; + / – 1 dB
• THD at 1kHz : < 0.1 % at 1V output
• S/N ratio : > 85 dB, G = 0 dB
• Bass boost/cut ~ 15 dB at 50 Hz
• Treble boost/cut ~ 15 dB at 15 kHz

Download the application notes of this stereo preamplifier circuit here
Download the TDA1524A datasheet here

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