LM1876, amplifier testing. Characteristics Measurement
| Testing device | LM1876 amplifier |
| Sampling mode | 24-bit, 48 kHz |
| Interface | E-MU1616m |
| Testing chain | E-MU1616m>LM1876 amplifier>E-MU1616m |
| Supply voltage bipolar | -25V...0...+25V |
| Load resistance | 4 Ohm |
| Testing power | 8W |
| Maximum power | 20W |
| 20 Hz - 20 kHz filter | ON |
| Normalize amplitude | ON |
| Level change | -0.4 dB / -0.4 dBБ |
| Mono mode | OFF |
| Calibration singal, Hz | 1000 |
| Polarity | correct/correct |
Summary
| Frequency response (from 40 Hz to 15 kHz), dB | -0.02, -0.10 |
Excellent |
| Noise level, dB (A) | -107.3 |
Excellent |
| Dynamic range, dB (A) | 107.3 |
Excellent |
| THD, % | 0.041 |
Good |
| THD + Noise, dB (A) | -65.6 |
Average |
| IMD + Noise, % | 0.065 |
Good |
| Stereo crosstalk, dB | -75.1 |
Very good |
| IMD at 10 kHz, % | 0.086 |
Good |
| General performance | Very good |
Frequency response
Left |
Right |
|
| From 20 Hz to 20 kHz, dB | -0.22, +0.01 |
-0.27, -0.02 |
| From 40 Hz to 15 kHz, dB | -0.06, +0.01 |
-0.10, -0.02 |
Noise level
Left |
Right |
|
| RMS power, dB | -106.1 |
-106.0 |
| RMS power (A-weighted), dB | -107.3 |
-107.3 |
| Peak level, dB FS | -81.6 |
-81.5 |
| DC offset, % | -0.0 |
-0.0 |
Dynamic range
Left |
Right |
|
| Dynamic range, dB | +106.2 |
+106.0 |
| Dynamic range (A-weighted), dB | +107.3 |
+107.3 |
| DC offset, % | +0.00 |
-0.00 |
THD + Noise (at -3 dB FS)
Left |
Right |
|
| THD, % | 0.04796 |
0.05406 |
| THD + Noise, % | 0.04799 |
0.05407 |
| THD + Noise (A-weighted), % | 0.06572 |
0.06941 |
Intermodulation distortion
Left |
Right |
|
| IMD + Noise, % | 0.07708 |
0.08295 |
| IMD + Noise (A-weighted), % | 0.07598 |
0.08143 |
Stereo crosstalk
Left |
Right |
|
| Crosstalk at 100 Hz, dB | -76 |
-81 |
| Crosstalk at 1000 Hz, dB | -58 |
-91 |
| Crosstalk at 10000 Hz, dB | -38 |
-58 |
IMD (swept tones)
Left |
Right |
|
| IMD + Noise at 5000 Hz, | 0.22826 |
0.22456 |
| IMD + Noise at 10000 Hz, | 0.07249 |
0.07793 |
| IMD + Noise at 15000 Hz, | 0.02997 |
0.03036 |
Conclusions
| LM1876 belongs to the "Overture" series, which differs from LM1875 in crystal circuitry, nevertheless, the "handwriting"
harmonic distortion is very similar to LM1875. This amplifier also sounds very similar to the LM1875, which
makes it an excellent choice for a quality sound path.
Summary: An excellent amplifier with very low distortion and high sound quality, which can be purchased from our store kit-amp.com. It is recommended to use this amplifier for low-power acoustics or full-range speakers. The module can also be considered as an alternative to the stereo amplifier on the TDA2030A STM or TDA2030A UTC |
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