20W Stereo HI-FI Low Noise Audio Amplifier Using LM1875
20W Audio Amplifier has been design around LM1875 IC from National. The project is truly professional amplifier clean, crispy sound reproduction and total freedom from noise, its deliver 20W + 20W RMS into 8 Ohms @ less then 1% THD (Greater then 0.06%) THD @ 1KHz in 1W with 8Ohms Load. Can be use as recording and broadcast studio near field monitor amp, audio monitor in studios, paging system power amplifier, back ground music amplifier. IC shall be protected from output short circuit. Frequency response 20Hz to 20KHz circuit also include DC servo feedback.
- Supply Dual (+/-) 25 VDC @ 2 Amp
- Onboard +/- 15 VDC Regulator for Balance preamplifer or also can be use as Aux power for VU meter or MIC preamplifier
- Onboard dual LED for power indication
- Audio input via berg connector
- Berg connector for VU Meter L-R and +/-15 V supply also can be use for head phone
- Screw terminal connector for speaker connection
- Screw terminal connector for Supply +/- 25 VDC
- THD+noise less then 1% @ 20W into 8 Ohms
