Edirol R-4 Main specifications

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Main specifications
● Channels
4
● Signal Processing
AD/DA Conversion: 24 bits
Sampling Frequency: 44.1/48/96 kHz
● Data Type
Format: WAV
Sampling Frequency: 44.1/48/96 kHz
Bit Depth: 16/24 bits
● Media
Internal Hard Disk Drive (40 GB)
CompactFlash (supports 32 MB–2 GB)
● Recording Time
16 bit/44.1 kHz (Stereo): 58 hours
16 bit/48 kHz (Stereo): 53 hours
24 bit/48 kHz (Stereo): 35 hours
16 bit/96 kHz (Stereo): 17 hours
* These recording times are approximate. Your actual results
may vary somewhat.
* If more than one recorded file exists, the total recordable time
will be less than these.
● Analog Inputs
Channel 1–4:
XLR type (phantom powered),
1/4 inch TRS phone type (balanced/unbalanced)
Internal Microphone (Stereo)
● Analog Outputs
LINE Out:
1/4 inch phone type (L, R),
RCA phono type (L, R)
Headphones:
Stereo 1/4 inch phone type
● Digital Input/Output
Coaxial type (conforms to IEC60958)
● Input Impedance
4 k ohms
● Nominal Input Level (Variable)
Line Level: -33– +4 dBu
MIC Level: -60– -23 dBu
● Output Impedance
LINE Out: 950 ohms
Headphones: 10 ohms
● Output Level:
LINE Out: -10 dBV
Headphones: 40 mW + 40 mW
● Limiter threshold level
-10 dB (relative to digital full-scale),
maximum compression ratio 1:3
● Residual Noise Level
LINE Out: -85 dBu
Digital Data: -90 dBFS
(fs = 96 kHz, Input: 1 k ohms terminated,
Level Switch: MIC,
Input Level Knob: Min. Input: 4 channels simultaneously)
● Total Harmonic Distortion (THD + N)
0.03 %
(fs = 96 kHz, Input: 1 k ohms terminated, Level Switch:
LINE, Input Level Knob: Min. Input: 4 channels
simultaneously, Band Width: 22 kHz)
● Recommended Load Impedance for
Headphones
32 ohms
● Frequency Response
10 Hz–40 kHz (0– -3 dB)
● Phantom Power
48+/-2 V / 8 mA
Available 4 Channels simultaneously
(total of all channels must be 25 mA or less)
* 0 dBu = 0.775 Vrms
Recorder Part
Audio Input and Output Part
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