Overview
Tascam DR-70D 4-Track Audio Field Recorder & Mixer for Audio/Video
The DR-70D from TASCAM is the ultimate audio recording solution for filmmakers. Four balanced XLR mic inputs meet the requirements of production sound, from professional users to indie DSLR shooters. The compact format can be mounted either above or below a camera, and a pair of built-in microphones can capture sound on-set. The interface is designed for quick adjustment, with additional features to keep recording levels under control.
4 XLR/TRS inputs are built-into the DR-70D. The four-channel design enables combinations of shotgun microphones, lavaliere mics, and the built-in stereo mic to be recorded individually. Channels 1 and 2 can be set to stereo input and channels 3 and 4 can be set to the built-in mics, making a variety of mic configurations possible.
MONO/DUAL MONO：Best for recording the audio of a single performer.
STEREO/DUAL STEREO：Best for recording with the built-in microphones or a stereo mic.
2MIX/DUAL 2MIX：Creates stereo files of two or more mixed inputs.
Dual Recording mode can be used to create a backup file that is simultaneously recorded at a different level to prevent clipping when levels exceed the maximum input. The second track is recorded up to 12dB lower as a safety track to prevent distortion – if your input signal overloads, you have a backup that isn't distorted.
- Maximum number of tracks recorded simultaneously: (4)
- Recording formats: 16/24-bit, 44.1k/48k/96k Hz (WAV/BWF)
- XLR/TRS inputs support +4dBu line level and phantom power (24V/48V)
- CAMERA IN jack allows the DSLR camera audio to be monitored through the DR-70D
- Tripod mounting threads (bottom), camera screw attachment and a shoe mount that can be attached and removed with a coin (top)
- Operates on (4) AA batteries, with an optional AC adapter (TASCAM PS-P520U) or USB cable provided with the unit (USB bus power).
- BP-6AA external battery pack (sold separately) makes operation for even longer times possible
- Low-cut filter with five settings (40/80/120/180/220 Hz) to be used to reduce unwanted air-conditioning noise and other low-frequency sounds
Specifications / Documents
Recording Media
- SDHC Cards: 4GB–32GB
- SDXC Cards: 48GB–128GB
- High-speed cards required
Recording Formats
- WAV: 44.1kHz / 48kHz / 96kHz (16-bit / 24-bit)
- BWF: 44.1kHz / 48kHz / 96kHz (16-bit / 24-bit)
- 4-Channel Recording (Stereo ×2 or Mono ×4)
Audio Inputs
XLR/TRS Combo Inputs (1–4)
- Connector: XLR-3-31 (1:GND, 2:HOT, 3:COLD) / 1/4" (6.3mm) TRS
- Mic Input Impedance: 2kΩ
- Phantom Power: 48V ±4V or 24V ±4V (10mA/CH)
- Max Input Level: 0dBu
- Min Input Level: –72dBu
- Mic Gain: +21dB / +36dB / +51dB / +63dB
- Line Input Impedance: 10kΩ or more
- Standard Line Level: +4dBu
- Max Line Level: +20dBu
1/8" (3.5mm) Stereo Mini Input
- Supports plug-in power
- Input Impedance: 10kΩ
- Max Input Level: +10dBV
- Min Input Level: –50dBV
- Mic Gain: +3dB / +11dB / +26dB / +38dB
Camera In
- 1/8" (3.5mm) Stereo Mini Jack
- Standard Input Level: –10dBV
- Max Input Level: +6dBV
Audio Outputs
- Line Out: 1/8" Stereo Mini, –10dBV nominal, +6dBV max
- Camera Out: 1/8" Stereo Mini, –40dBV nominal, –24dBV max
- Headphones: 1/8" Stereo Mini, 20mW + 20mW
Connectivity
- USB: Micro-B (USB 2.0 High Speed)
- Remote: 2.5mm TRS jack
Power
- 4 × AA batteries (Alkaline or Ni-MH)
- USB bus power
- Optional AC adapter (PS-P520U)
- Optional external battery pack (BP-6AA)
- Power Consumption: 5W
Battery Life (Approximate)
| Battery Type | Phantom OFF | Phantom ON | Built-in Mic |
|---|---|---|---|
| Alkaline | 6 hrs | 3.5 hrs | 11 hrs |
| Ni-MH (Standard) | 6.25 hrs | 3.25 hrs | 10.5 hrs |
| Ni-MH (Pro) | 7.75 hrs | 4.75 hrs | 14.25 hrs |
Physical Specifications
- Dimensions: 6.65" × 2.2" × 4.2"
- Weight: 1.37 lbs (with batteries) / 1.16 lbs (without)
- Operating Temperature: 32°F to 104°F (0°C to 40°C)
Audio Performance
- Frequency Response: 20Hz–20kHz (44.1/48kHz), 20Hz–40kHz (96kHz)
- Distortion: ≤ 0.02%
- Signal-to-Noise Ratio: ≥ 92dB
- Equivalent Input Noise: ≤ –120dBu
Recording Time (Stereo WAV/BWF)
| Format | 1GB | 2GB | 4GB | 8GB |
|---|---|---|---|---|
| 16-bit 44.1kHz | 1:41 | 3:22 | 6:44 | 13:28 |
| 16-bit 48kHz | 1:33 | 3:06 | 6:12 | 12:24 |
| 24-bit 48kHz | 1:02 | 2:04 | 4:08 | 8:16 |
Note: Recording times are estimates and vary by SD card. Mono recording doubles time. Dual or 4-channel recording reduces time by approximately half.
