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Sampling frequency
ATRAC3, ATRAC3plus, MP3: 44.1 kHz
Audio compression technology
Adaptive Transform Acoustic Coding3 (ATRAC3)
Adaptive Transform Acoustic Coding3plus
(ATRAC3plus)
MPEG1 Audio Layer-3 (MP3): 32 to 320 kbps,
variable bit rate-compliant
Frequency response
20 to 20,000 Hz (single signal measurement)
FM Frequency range
(NW-E303/E305/E307 only)
Overseas model: 76.0 to 108.0 MHz
Other models: 87.5 to 108.0 MHz
IF (FM) (NW-E303/E305/E307 only)
225 kHz
Antenna (NW-E303/E305/E307 only)
Headphone cord antenna
Interface
Headphone: Stereo mini
USB
Signal-to-noise ratio (S/N)
80 dB or more (excluding ATRAC3 132 kbps)
Dynamic range
85 dB or more (excluding ATRAC3 132 kbps)
Operating temperature
5˚C to 35˚C (67˚F to 95˚F)
Power source
• Built-in rechargeable lithium-ion battery
• USB power (from a computer through the USB A
plug)
Specifications
Maximum recording time (Approx.)
ATRAC3plus
3 hr. 30 min. (320 kbps)
4 hr. 20 min. (256 kbps)
5 hr. 50 min. (192 kbps)
7 hr. 00 min. (160 kbps)
8 hr. 50 min. (128 kbps)
11 hr. 40 min. (96 kbps)
17 hr. 30 min. (64 kbps)
23 hr. 30 min. (48 kbps)
ATRAC3
8 hr. 30 min. (132 kbps)
NW-E305/NW-E205
MP3
4 hr. 20 min. (256 kbps)
8 hr. 50 min. (128 kbps)
ATRAC3plus
7 hr. 00 min. (320 kbps)
8 hr. 50 min. (256 kbps)
11 hr. 40 min. (192 kbps)
14 hr. 00 min. (160 kbps)
17 hr. 40 min. (128 kbps)
23 hr. 30 min. (96 kbps)
35 hr. 00 min. (64 kbps)
47 hr. 00 min. (48 kbps)
ATRAC3
17 hr. 00 min. (132 kbps)
NW-E307/NW-E207
MP3
8 hr. 50 min. (256 kbps)
17 hr. 40 min. (128 kbps)
ATRAC3plus
1 hr. 40 min. (320 kbps)
2 hr. 10 min. (256 kbps)
2 hr. 50 min. (192 kbps)
3 hr. 30 min. (160 kbps)
4 hr. 20 min. (128 kbps)
5 hr. 50 min. (96 kbps)
8 hr. 40 min. (64 kbps)
11 hr. 40 min. (48 kbps)
ATRAC3
4 hr. 10 min. (132 kbps)
NW-E303
MP3
2 hr. 10 min. (256 kbps)
4 hr. 20 min. (128 kbps)