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Studio & Recording

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Denon DN-300R Solid-State SD and USB Audio Recorder
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The Denon DN-300R is a 1 RU, rack-mountable audio recorder and playback device designed for installed sound applications in houses of worship, music clubs, and more. The unit can record to SD/SDHC/SDXC cards and USB media, either one at a time or simultaneously to both; perfect for capturing conferences or concerts where the client needs a copy of the recording immediately after the event.

The DN-300R features a set of balanced XLR and unbalanced RCA I/O for connecting the input of the unit to an external audio source and its output to powered speakers or a sound system. The unit records WAV files at up to 24-bit / 48 kHz and MP3 files at up to 256 kbps.

Multiple record options are available including mono, stereo, dual mono, and dual stereo. In dual mono and dual stereo modes, two audio files are created with the second one recorded at -10 dB to help protect your recording against accidental peaks in the audio source. Record start can be automatically triggered when the input level passes a certain threshold.

Various playback options enable you to play just a single track or all tracks in a folder or on the device, in repeat or random playback modes. A headphone output with independent level allows you to monitor quietly while recording or playing back.

  • Records WAV and MP3 files to SD and USB media simultaneously
  • Simple and easy to use
  • Balanced XLR and unbalanced RCA inputs and outputs
  • Powers up in record-ready mode
  • Multiple record modes including mono, stereo, and more
  • Multiple playback modes including repeat, random, and more
  • Record two stereo files at the same time with the second file recorded as a safety track at -10 dB
  • Starts and stops recording when the input level passes a certain threshold
  • Stops recording after a period of time has elapsed
  • Headphone output with independent level
  • Compact, rack-mountable 1 RU design

Technical Specifications

System Media recorder and player
Compatible Media USB: 256 MB to 2 TB
SD Card: 64 MB to 2 GB
SDHC Card: 4 to 32 GB
SDXC Card: 48 to 128 GB
Supported File Systems FAT16, FAT32
Supported File Formats MP3
Sampling Frequency: 44.1 kHz
Bit Rate (Recording): 192, 256 kbps 
Bit Rate (Playback): 64 to 320 kbps and VBR
Format: MPEG1 Audio Layer 3
File Extension: .mp3 

Sampling Frequency: 44.1, 48 kHz
Bit Depth: 16-bit (44.1 kHz), 24-bit (48 kHz)
Format: Waveform Audio File Format
File Extension: .wav
Number of Channels 2 x channels, stereo
Frequency Response 10 Hz to 20 kHz, ±1.0 dB (recording), ±0.8 dB (playback)
S/N Ratio Recording: > 95 dB
Playback: > 95 dB
(1 kHz, 0 dB, A-weighted)
Channel Separation Recording: > 80 dB
Playback: > 90 dB
(1 kHz, 0 dB, A-weighted)
Wow & Flutter < 0.001%
Distortion Recording: < 0.008%
Playback: < 0.006%
Total Harmonic Distortion < 0.01% (1 kHz, 0 dB, A-weighted)
Balanced XLR Inputs Nominal Level: +4 dBu, ±1 dBu
Minimum Level: -40 dBu
Maximum Level: 20 dBu, ±1 dBu
Input Impedance: 18 kOhms
Unbalanced RCA Inputs Nominal Level: -10 dBV (at full scale: -16 dB)
Minimum Input Level: -19 dBV or higher
Input Impedance: 22 kOhms, ±10%
Balanced XLR Outputs Nominal Level: +4 dBu, ±1 dBu
Maximum Output Level: +20 dBu, ±1 dBu
Output Impedance: 600 Ohms, ±10%
Unbalanced RCA Outputs Nominal Level: -10 dBV, ±2 dBV
Minimum Output Level: 6 dBV, ±2 dBV
Output Impedance: 600 Ohms, ±10%
Connectors 2 x XLR inputs
2 x XLR outputs
1 x RCA stereo input pair
1 x RCA stereo output pair
1 x 1/4" / 6.35 mm headphone output
1 x USB port
1 x SD card slot
1 x IEC power input
Power Supply Input Voltage: 100-240 VAC, 50/60 Hz
Rack Space 1 RU
Dimensions (W x D x H) 19.0 x 10.0 x 1.7" / 483.0 x 254.0 x 44.0 mm
Weight 6.6 lb / 3.0 kg
Packaging Info
Package Weight 11.2 lb
Box Dimensions (LxWxH) 21.7 x 15.2 x 5.9"

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