LM386 headphone amplifier testing. Performance Measurement
| Testing device | LM386 Headphone Amplifier |
| Sampling mode | 24-bit, 48 kHz |
| Interface | E-MU1616m |
| Testing chain | E-MU1616m>LM386 Headphone Amplifier>E-MU1616m |
| Supply voltage DC | 9VV |
| Load resistance | 68 Ohm |
| Testing power | 0.1W |
| Maximum power | 0.7W |
| 20 Hz - 20 kHz filter | ON |
| Normalize amplitude | ON |
| Level change | -0.5 dB / -0.5 dBБ |
| Mono mode | OFF |
| Calibration singal, Hz | 1000 |
| Polarity | correct/correct |
Summary
| Frequency response (from 40 Hz to 15 kHz), dB | +0.07, +0.01 |
Excellent |
| Noise level, dB (A) | -93.7 |
Very good |
| Dynamic range, dB (A) | 93.7 |
Very good |
| THD, % | 0.133 |
Average |
| THD + Noise, dB (A) | -55.2 |
Poor |
| IMD + Noise, % | 0.130 |
Average |
| Stereo crosstalk, dB | -47.2 |
Average |
| IMD at 10 kHz, % | 0.123 |
Average |
| General performance | Good |
Frequency response
Left |
Right |
|
| From 20 Hz to 20 kHz, dB | -0.07, +0.01 |
-0.04, +0.07 |
| From 40 Hz to 15 kHz, dB | -0.04, +0.01 |
+0.01, +0.07 |
Noise level
Left |
Right |
|
| RMS power, dB | -92.7 |
-92.4 |
| RMS power (A-weighted), dB | -93.8 |
-93.5 |
| Peak level, dB FS | -69.9 |
-69.9 |
| DC offset, % | -0.0 |
-0.0 |
Dynamic range
Left |
Right |
|
| Dynamic range, dB | +92.7 |
+92.4 |
| Dynamic range (A-weighted), dB | +93.8 |
+93.5 |
| DC offset, % | +0.00 |
-0.00 |
THD + Noise (at -3 dB FS)
Left |
Right |
|
| THD, % | 0.12167 |
0.14439 |
| THD + Noise, % | 0.12178 |
0.14449 |
| THD + Noise (A-weighted), % | 0.15869 |
0.18828 |
Intermodulation distortion
Left |
Right |
|
| IMD + Noise, % | 0.11885 |
0.14028 |
| IMD + Noise (A-weighted), % | 0.07934 |
0.09166 |
Stereo crosstalk
Left |
Right |
|
| Crosstalk at 100 Hz, dB | -46 |
-46 |
| Crosstalk at 1000 Hz, dB | -46 |
-46 |
| Crosstalk at 10000 Hz, dB | -46 |
-46 |
IMD (swept tones)
Left |
Right |
|
| IMD + Noise at 5000 Hz, | 0.14662 |
0.17134 |
| IMD + Noise at 10000 Hz, | 0.09784 |
0.11698 |
| IMD + Noise at 15000 Hz, | 0.09141 |
0.11290 |
Conclusions
| A budget headphone amplifier whose main task is to amplify the signal from a linear level to the amplified level for headphones and this amplifier does an excellent job with the task. The amplifier develops maximum power when powered by 12V, when powered from USB, maximum power will be about 0.1W |
|
Summary: The amplifier can be recommended in cases where the power of the headphone amplifier is not enough, or if your equipment does not have a headphone jack and an amplifier, respectively. |
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