A stereo amplifier with a power supply, based on the LM1876 microcircuit, is the junior representative of the legendary Overture line of chips. This microcircuit in terms of sound quality and features, almost completely repeats the well-known LM3886, with the exception of power. If the task is to build a high quality, inexpensive and simple stereo amplifier, then the original LM1876 is the best choice! On the board of the module, in addition to the amplifier, there are power supply elements: a diode bridge, smoothing and shunt capacitors, which allows the amplifier to be connected directly to the terminals of the transformer with 2 windings connected at the midpoint.
LM1876 microcircuits are supplied in two types of packages: insulated and non-insulated. In case of ordering a non-insulated housing, the set includes mica, insulating gasket

Output protection against short-circuit to ground and to power rails.
Overcurrent protection 3.5A
Overheat protection

Measurements
Supply voltage AC	20V...0...20V
Load resistance	4 Ohm
Power maximum, W	20
Testing power, W	8
Frequency response (from 40 Hz to 15 kHz), dB	-0.02, -0.10
Noise level, dB (A)	-107,3
Dynamic range, dB (A)	107,3
THD, %	0,0410
THD + Noise, dB (A)	-65,6
IMD + Noise, %	0,0650
Stereo crosstalk, dB	-75,1
IMD at 10 kHz, %	0,0860
Amplifier Measurement Page
General characteristics
Amplifier class	AB
Built-in protection	Yes
Chip	LM1876
Gain	23
Maximum supply voltage (bipolar / constant) DC	28V
Minimum supply voltage (bipolar / constant) DC	10V
Module size LxWxH, mm	50x100x35
Number of channels	stereo
Supply voltage, maximum (alternating / 2 shoulders on) AC	18V
Supply voltage, minimum (alternating / 2 shoulders on) AC	10V
Weight, kg	0,106