DIY LM1875T STEREO Power Amplifier (October 20, 2019)
DIY LM1875T STEREO Power Amplifier (October 20, 2019)
Specification.
Power amplifire IC: TEXAS INSTRUMENTS LM1875T
Output power: 20W(8 ohm) max at +- 25V DC
Closed loop voltage gain: 26dB
Supply voltage: DC 19.5V *1
*1:translated into 100V AC to +-19.5V DC with TOYOZUMI's trans and regulator of JRC's NJM 317.
Over view.(Circuit boards in AEON's Top value series lunch box)
Circuit board.(Over view)
Circuit board.(Over view)
Check the single power amplifier unit.
Planning for implementation.
Front view.
Back view.
Connecters.(Speaker terminal, Input RCA terminal)
Speaker protection circuit board.
Speaker protection circuit board.(Back)
Power supply unit.
Connected power supply unit and power amplifier unit.
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