LM3886 amplifier testing. Characteristics Measurement
| Testing device | LM3886 amplifier |
| Sampling mode | 24-bit, 48 kHz |
| Interface | E-MU1616m |
| Testing chain | E-MU1616m>LM3886 mono amplifier>E-MU1616m |
| Supply voltage bipolar | -30V...0...+30V |
| Load resistance | 4 Ohm |
| Testing power | 20W |
| Maximum power | 90W |
| 20 Hz - 20 kHz filter | ON |
| Normalize amplitude | ON |
| Level change | -0.6 dB / -0.6 dB |
| Mono mode | ON |
| Calibration singal, Hz | 1000 |
| Polarity | correct/correct |
Summary
| Frequency response (from 40 Hz to 15 kHz), dB | +0.02, -0.11 |
Excellent |
| Noise level, dB (A) | -106.4 |
Excellent |
| Dynamic range, dB (A) | 106.6 |
Excellent |
| THD, % | 0.012 |
Good |
| THD + Noise, dB (A) | -75.7 |
Good |
| IMD + Noise, % | 0.00756 |
Very good |
| IMD at 10 kHz, % | 0.092 |
Good |
| General performance | Very good |
Frequency response
Left |
Right |
|
| From 20 Hz to 20 kHz, dB | -0.19, +0.02 |
-0.19, +0.02 |
| From 40 Hz to 15 kHz, dB | -0.11, +0.02 |
-0.11, +0.02 |
Noise level
Left |
Right |
|
| RMS power, dB | -100.7 |
-100.7 |
| RMS power (A-weighted), dB | -106.4 |
-106.4 |
| Peak level, dB FS | -90.4 |
-90.4 |
| DC offset, % | -0.0 |
-0.0 |
Dynamic range
Left |
Right |
|
| Dynamic range, dB | +100.6 |
+100.6 |
| Dynamic range (A-weighted), dB | +106.6 |
+106.6 |
| DC offset, % | +0.00 |
-0.00 |
THD + Noise (at -3 dB FS)
Left |
Right |
|
| THD, % | 0.01222 |
0.01222 |
| THD + Noise, % | 0.01249 |
0.01249 |
| THD + Noise (A-weighted), % | 0.01631 |
0.01631 |
Intermodulation distortion
Left |
Right |
|
| IMD + Noise, % | 0.00756 |
0.00756 |
| IMD + Noise (A-weighted), % | 0.00630 |
0.00630 |
IMD (swept tones)
Left |
Right |
|
| IMD + Noise at 5000 Hz, | 0.07165 |
0.07165 |
| IMD + Noise at 10000 Hz, | 0.08408 |
0.08408 |
| IMD + Noise at 15000 Hz, | 0.12108 |
0.12108 |
Conclusions
| Stable demand for a not short production period means that this is one of the best microcircuits for implementation of a high-quality power amplifier. Direct competitors of this chip are TDA7293 and TDA7294 and about the question "which is better?" not a few copies were broken, however, it should be admitted that both options, both on the TDA and on LM have their pros and cons, which ultimately puts them on the same level and the choice here is purely individual. |
|
Summary: Summary: One of the best microcircuit amplifiers in class AB, has excellent performance and a pleasant sounding. It is recommended to use this amplifier in building a high-quality audio path. both with shelf and floor acoustics. You can buy an amplifier in our kit-amp.com store. Further, objective, improvement in the quality of the "amplifying" part of the sound path will certainly entail material costs are an order of magnitude, or even several orders of magnitude higher |
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