Zoom - H4n
LINDOS AUDIO SEQUENCE TEST Zoom - H4n
SOURCE MS20 V1.4 'Rec level' set to 1 on H4n
11-Jul-12 01:09 PM TOLERANCE Lindos GradeA FAILED


FREQUENCY RESPONSE [u] 0dB
20Hz -2.75* -3.00* ±2
31Hz -1.25* -1.62* ±1
40Hz -0.87 -1.12* ±1
50Hz -0.62 -1.00 ±1
100Hz -0.25 -0.50 ±1
315Hz 0.00 -0.25 ±1
1k0 0.00 -0.37 ±1
6k3 -0.50 -0.75 ±1
10k0 -0.50 -0.75 ±1
12k5 -0.50 -0.75 ±1
14k0 -0.50 -0.75 ±1
16k0 -0.37 -0.62 ±1
20k0 -1.75 -2.00 ±2
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]
WTD -63.33 -63.53 -60
DIST RES 1kHz WTD REL [r]/q
-20dB -43.14 -42.94 -40
0dB -57.03 -57.35 -45
+8dB -52.52 -52.84 -45
+12dB -46.43 -46.84 -45
+15dB -43.92* -44.28* -45
+18dB -42.87* -43.08* -45
PHASE DIFFERENCE R-L [z]
3k15 -22.00* ±10
10k0 -78.00* ±20
15k0 -108.00* ±30


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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