R-4 Pro

4-channel Portable Recorder and Wave Editor

Portable 4 Channel Recorder with Superior Sound Quality and SMPTE Time Code sync function

  • USB

Portable 4 Channel Recorder with Superior Sound Quality and SMPTE Time Code sync function

The R-4 Pro shares the R-4's rugged construction, robust feature set and great sound quality, but the R-4 Pro also includes AES/EBU support, SMPTE time code and superb electronics. Record up to four channels at 24-bit 96KHz and monitor each channel discretely. The durable DC input jack allows for industry-standard battery packs to extend your record time. Its 80GB hard drive will store up to 116 hours of high quality audio. You can plug in any standard USB drive and enjoy fast back-ups of your projects. Like the R-4, the R-4 Pro has on-board effects and WAV editing features. Geared for pro videographers and recordists, the R-4 Pro delivers professional sound and features in a package that everyone can afford.

  • - SMPTE Time Code In/Out for Video Sync
  • - 4 Channel Recording
  • - 24 bit / 192 kHz Resolution
  • - 80GB Hard Disk Drive
  • - Instant backup via USB 2.0
  • - Direct Connection with Computer
  • - Wave Editing Function

AES/EBU Input/Output

The R-4 Pro is equipped with XLR style AES/EBU digital Input and Output for connection with pro Audio and Video recorders or sources.

Individual Monitoring of 4 channels

Individual monitoring of all channels is enabled via the four analog outputs. This allows precise monitoring of all recorded audio.

Extended Recording with 80GB Hard Disk Drive

Equipped with a 80GB hard disk drive, the R-4 Pro can record a stereo audio file for following hours.

Superior 24-bit/192-kHz Linear Recording

Totally uncompressed recording assures outstanding sound quality. Choose 16-bit or 24-bit quantization and a sampling rate of 44.1 kHz to 192 kHz. Save data as BWF or WAV files.

Simultaneous 4-Channel Recording

The 4 XLR/Phone combo jacks come with switchable phantom power and give you a choice of MONO, STEREO, STEREO X2, or 4CH recording. Digital input/output is also provided.Four-channel recording gives you exceptional flexibility.

On-Board Limiter (selectable)

Built into the analog stage, the Limiter helps deliver a stable and reliable recording free of clipped noise from sudden input surges.

Built-In Nondirectional Stereo Microphones

The R-4 Pro's omnidirectional, back electret condenser microphones offer superb transient characteristics and vibration resistance.

Pre-Recording Function

When the REC button is pressed, the current material is appended to a buffer that contains recorded material from a few seconds earlier. This helps prevent missed recording opportunities or sound bites at the beginning of a recording.

Computer Linking

USB 2.0 provides a High Speed Computer Data Link. You can transfer the data about 20 times faster than DAT.You can also use R-4 Pro as a 80GB storage device. Edit R-4 Pro files directly from DAWs and other applications.

Instant Backup via USB 2.0

The USB host terminal of R-4 Pro enables high speed and instant backup of recorded data to affordable and easy obtainable media like Flash Memory, Memory Cards via card reader or HDD storage. Easy and high speed duplication of recorded data improves production workflow across multiple locations.

Master or Slave Sync with SMPTE Time Code

The R-4 Pro accepts SMPTE time code which enables it to slave to video cameras or VCRs. Four channels of high quality audio can be fully synchronized with video. In addition, the R-4 Pro can also act as the master, sending out time code to slave devices.

DC Input for External Battery Power Supply

The R-4 Pro is equipped with a 4-pin XLR type battery power input. This enables power supplies from industry standard battery manufacturers for video cameras such as Anton-Bauer, etc. Additional flexibility in power options include AA type battery power or AC power (via adapter).

Wave Editing

Just watch the waveform on the LCD. Scrubbing playback with the shuttle dial let you set the edit points precisely bysound.

Newly designed High Quality Pre-amps

The high quality R-4 Pro pre-amps specially designed for field recording ensures superior sound quality.

Operation Screens

The large 128x68 LCD display enables easy/intuitive operations.

Recorder Part

Signal Processing
AD/DA Conversion: 24 bits
Sampling Frequency: 44.1/48/88.2/96/192 kHz
* Limited to Stereo x 1 when 192kHz
Data Type
Format: BWF, WAV
Bit Depth: 16/24 bits
Sampling Frequency: 44.1/48/88.2/96/192 kHz
Recording Media
Internal Hard Disk Drive (80 GB)
Recording Time (Stereo, UNIT: hours)
44.1 kHz 48 kHz 88.2 kHz 96 kHz 192 kHz
16 bits: 116 106 58 53 26
24 bits: 77 70 38 35 17

* 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.
Time Code
Time Code: 24, 25, 29.97D, 29.97ND, 30D, 30ND fps
Running Mode: Internal (free run), External, REC Run, RTC
Jamming Mode: Manual, External
Clock Accuracy: Max Error Rate : 80ppm

Audio Input and Output Part

Analog Inputs
Channel 1--4: XLR type (Phantom powered)
Internal Microphones (Stereo)
Analog Outputs
LINE Out: RCA phono type (Channel 1--4)
Headphones: Stereo 1/4 inch phone type
Digital Input/Output
XLR type (AES/EBU, conforms to IEC 60958-4)
Nominal Input Level
(Input Level Knob: Center) (Variable)
-56, -50, -44, -38, -32, -26, -20, -14, -8, -2, +4 dBu
(Input Level Knob: -∞-- +8 dB)
Input Impedance
Analog Input: 4 k ohms
Output Level
LINE Out: -10 dBu
Headphones 40 mW + 40 mW
Output Impedance
LINE Out: 950 ohms
Headphones: 10 ohms
Residual Noise Level
LINE Out: -90 dBu
(SENS Knob: +4 dBu, Input Level Knob: Min)
Analog Audio : 950 Ohms, Headphone : 10 Ohms
Total Harmonic Distortion (THD + N)
0.01 % (SENS Knob: +4 dBu, Input Level Knob: Center)
Recommended Load Impedance for Headphones
32 ohms
Frequency Response
20 Hz--40 kHz (0-- -3 dB)
Phantom Power
48+/-4 V / 8 mA (Available 4 Channels simultaneously)
* Shoould be less than 25mA in total

Other Input/Output Part

USB Interface
A Type Connector (For USB Storage device)
Supports USB 1.1 and 2.0 Mass Storage Device Class.
B Type Connector (For Computer)
Supports USB 1.1 and 2.0 Mass Storage Device Class.
SMPTE Timecode connectors
BNC Connectors (Conforms SMPTE 12M-1999)
Effect Unit Part
* Available to either recording or playing
* Not available to recording in 192 kHz sampling frequency.


128 x 64 dots Graphic LCD (backlit LCD)
Power Supply
AC Adaptor (PSB-1U) Alkaline dry battery LR6 (AA) type x 8, or Nickel Metal Hydride battery (HR15/51) x 8
External Power Supply: 4-pin XLR type (9--16 V)
Current Draw
2.0 A
Owner's Manual
AC Adaptor (PSB-1U)
AC Adaptor - 4pin XLR type connector conversion cable
USB cable
Carrying Case

Size and Weight

Width (W)
240 mm9-1/2 inches
Depth (D)
217 mm8-9/16 inches
Height (H)
77 mm3-1/16 inches
1.7 kg3 lbs. 12 oz.

* 0 dBu = 0.775 Vrms

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All specifications and appearances are subject to change.


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