FREQUENCY RESPONSE [u] 0dB
| 20Hz | -2.75 | -3.00 | +3-6 |
| 31Hz | -1.25 | -1.62 | ±3 |
| 40Hz | -0.87 | -1.12 | ±2 |
| 50Hz | -0.62 | -1.00 | ±2 |
| 100Hz | -0.25 | -0.50 | ±2 |
| 315Hz | 0.00 | -0.25 | ±2 |
| 1k0 | 0.00 | -0.37 | ±2 |
| 6k3 | -0.50 | -0.75 | ±2 |
| 10k0 | -0.50 | -0.75 | ±2 |
| 12k5 | -0.50 | -0.75 | ±2 |
| 14k0 | -0.50 | -0.75 | ±3 |
| 16k0 | -0.37 | -0.62 | |
| 20k0 | -1.75 | -2.00 | |
| 25k0 | -16.00 | -16.25 | |
FREQUENCY RESPONSE [x] +15dB
| 20Hz | +12.25 | +12.00 | |
| 31Hz | +13.62 | +13.37 | |
| 40Hz | +14.00 | +13.75 | |
| 50Hz | +14.25 | +14.00 | |
| 100Hz | +14.75 | +14.37 | |
| 315Hz | +14.87 | +14.50 | |
| 1k0 | +14.87 | +14.50 | |
| 6k3 | +13.75 | +13.62 | |
| 10k0 | +12.12 | +12.00 | |
| 12k5 | +11.25 | +11.12 | |
| 14k0 | +11.12 | +11.00 | |
| 16k0 | +11.62 | +11.50 | |
| 20k0 | +9.00 | +8.87 | |
| 25k0 | -5.00 | -5.00 | |
LEVEL VS LEVEL [h]
TEST LEVEL OUT 1kHz [t]
| TL dB | -04.15 | -04.44 | |
| DELms | | | |
NOISE ITU-468 Q-Pk REL [n]
DIST RES 1kHz WTD REL [r]/q
| -20dB | -43.14 | -42.94 | -25 |
| 0dB | -57.03 | -57.35 | -30 |
| +8dB | -52.52 | -52.84 | -30 |
| +12dB | -46.43 | -46.84 | -30 |
| +15dB | -43.92 | -44.28 | -30 |
| +18dB | -42.87 | -43.08 | |
PHASE DIFFERENCE R-L [z]
| 3k15 | -22.00 | | ±45 |
| 10k0 | -78.00 | | ±90 |
| 15k0 | -108.00 | | |
MS20 output level -28dBu. H4n rec level set to 1.
This very popular portable audio recorder does not perform well. 3dB down at 20Hz is not really acceptable. High levels of distortion above +8dB and a falling frequency response at high levels of high frequencies. Manual tests indicate a problem with the input intermodulating on frequencies above 5kHz at levels above -8dBFS. This is sort of problem listening tests would not pickup. Phase error is also not ideal (summing the channels to mono will cause a loss of high frequencies). Noise -63 is around 15 bit performance but if you take into account the that you can't use the top 10dB of headroom noise is more like -53 (13.5 bit). Equivilant input noise measures as -96dB 468 weighted. This means there is 5dB (96 - 28 - 63) of preamp gain available before preamp noise exceeds A/D noise. |
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