TPA6120 headphone amplifier testing. Performance Measurement

TPA6120 Headphone Amplifier

Testing device TPA6120 Headphone Amplifier
Sampling mode 24-bit, 48 kHz
Interface E-MU1616m
Testing chain E-MU1616m>TPA6120 Headphone Amplifier>E-MU1616m
Supply voltage AC 18V...0...18V
Load resistance 68 Ohm
Testing power 0.25W
Maximum power 0.6W
   
   
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
+0.01, -0.06
Excellent
Noise level, dB (A)
-103.5
Excellent
Dynamic range, dB (A)
103.4
Excellent
THD, %
0.012
Good
THD + Noise, dB (A)
-76.2
Average
IMD + Noise, %
0.040
Good
Stereo crosstalk, dB
-70.0
Good
IMD at 10 kHz, %
0.016
Very good
General performance
 
Very good



Frequency response

Spectrum graph

 
Left
Right
From 20 Hz to 20 kHz, dB
-0.07, +0.01
-0.09, +0.01
From 40 Hz to 15 kHz, dB
-0.04, +0.01
-0.06, +0.01



Noise level

Spectrum graph

 
Left
Right
RMS power, dB
-102.3
-102.2
RMS power (A-weighted), dB
-103.5
-103.5
Peak level, dB FS
-80.9
-81.1
DC offset, %
-0.0
-0.0



Dynamic range

Spectrum graph

 
Left
Right
Dynamic range, dB
+102.2
+102.1
Dynamic range (A-weighted), dB
+103.3
+103.4
DC offset, %
+0.00
-0.00



THD + Noise (at -3 dB FS)

Spectrum graph

 
Left
Right
THD, %
0.01168
0.01203
THD + Noise, %
0.01182
0.01216
THD + Noise (A-weighted), %
0.01531
0.01576



Intermodulation distortion

Spectrum graph

 
Left
Right
IMD + Noise, %
0.04022
0.04070
IMD + Noise (A-weighted), %
0.00754
0.00768



Stereo crosstalk

Spectrum graph

 
Left
Right
Crosstalk at 100 Hz, dB
-66
-67
Crosstalk at 1000 Hz, dB
-69
-69
Crosstalk at 10000 Hz, dB
-62
-69



IMD (swept tones)

Spectrum graph

 
Left
Right
IMD + Noise at 5000 Hz,
0.01597
0.01624
IMD + Noise at 10000 Hz,
0.01576
0.01603
IMD + Noise at 15000 Hz,
0.01582
0.01615



Conclusions

  The TPA6120 headphone amplifier is assembled on the basis of a powerful specialized op-amp with high load capacity and high speed, thanks to which the sound quality will be at a very high level in almost any headphone. The board is designed for efficient drainage heat from the chip, so additional cooling is not required. Signal path is maximally simplified and shortened - absent decoupling capacitors, which can be called an uncompromising solution for the sake of quality. The amplifier is assembled on DIP elements, which managed to fit only 5x5cm on the board. Suppression of harmonics and noise at a very high level, only the second harmonic prevails in the spectrum.

Summary: An excellent and high quality amplifier with a high sound level. The amplifier is suitable as a start to the world of high-quality sound for headphones, as well as in case of a shortage of space in the building. You can buy an amplifier from us at kit-amp.com. To unleash the potential of this amplifier, we recommend both signal source and headphones of a sufficiently high level




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