Scelta tra due registratori vocali digitali

[katoble]

Vorrei un consiglio sull'acquisto tra un registratore olympus dm-620 e un sony idc-ux512 .

Dal punto di vista della componentistica (tipo di microfono,soglia frequenza di risposta....) la differenza è tanta?
Mi serve per registrare lezioni e in futuro conferenze e convegni.


Vi posto le caratteristiche

Olympus

Recording Format PCM (WAV), MP3 and WMA
Recording Media Built-in 4GB flash memory and micro SD card slot
Recording Time PCM
48kHz 16-bit: 5h25m
44.1kHz 16-bit: 5h55m

MP3
320kbps: 26h
256kbps: 32h30m
128kbps: 65h30m
64kbps mono: 131h

WMA
128kbps: 64h
64kbps: 128h
32kbps: 257h
8kbps mono: 1007h
PC Interface Hi speed USB 2.0
Overall Frequency Response 20Hz-20kHz(center microphone ON)
70Hz-20kHz(center microphone OFF)
Practical Maximum Output Headphone: 4.0mW + 4.0mW (at load of 16Ω)
Speaker: 400mW (8Ω load)
Speaker 20 mm round dynamic speaker (mono)
Microphone Jack 3.5mm dia. Mini-jack, impedance 2.2kΩ
Earphone Jack 3.5mm dia, impedance 8Ω or more

Sony
Recording format:
4 Maximum working output:
Linear PCM (Pulse Code Modulation)
MP3 (MPEG-1 Audio Layer3)
WMA (Windows Media Audio)
4 Input level:
— 70 dBv
4 Sampling frequency:
Linear PCM format
48 kHz 16 bit
44.1 kHz 16 bit
48 kHz
44.1 kHz
â 150 mV (according to EN 50332-2)
4 Wide band characteristic
headphone output:
75 mV â (according to EN 50332-2)
4 Recording medium:
Built-in NAND FLASH memory: 4 GB
microSD card: 512 MB to 32 GB
4 Speaker:
Built-in ø 20 mm round dynamic speaker
MP3 format
320 kbps 44.1 kHz
256 kbps 44.1 kHz
128 kbps 44.1 kHz
mono 44.1 kHz
4 MIC jack:
ø 3.5 mm mini-jack, impedance 2.2 kΩ
4 EAR jack:
ø 3.5 mm mini-jack, impedance 8 Ω or
more
4 Input power requirement:
WMA format
128 kbps
400 mW (8 Ω speaker)
4 Maximum headphone output:
44.1 kHz
44.1 kHz
32 kbps 22 kHz
mono 8 kHz
4 External dimensions:
110.8 mm × 39.8 mm × 15.4 mm
(without protrusions)
6
64 kbps
Batteries:
AAA battery (LR03) or
Olympus Ni-MH rechargeable battery
External power supply:
USB connecting AC adapter(A514) 5 V
4 Weight:
86 g (including batteries)
4 Operating temperature:
0°C - 42°C/ 32°F - 107.6°F