| Test | 49TXi non-modified 50Hz 7 kHz -6dB FS | 49TXi modified 50Hz 7kHz -6dB FS |
| Frequency response (from 40 Hz to 15 kHz), dB: | +0.01, -0.18 | +0.01, -0.18 |
| Noise level, dB (A): | -76.5 | -80.0 |
| Dynamic range, dB (A): | 76.2 | 79.7 |
| THD, %: | 0.0073 | 0.0064 |
| IMD, %: | 0.082 | 0.055 |
| Stereo crosstalk, dB: | -84.1 | -85.1 |