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Denon Pro DN-300RMKII - Solid-State SD/USB Audio Recorder The Denon Pro DN-300RMKII is a high-quality, easy-to-use solid-state audio recorder that simultaneously records to SD and USB media. Ideal for commercial applications such as conferences, it offers reliable dual recording with flexible input and output options in a compact 1RU design. Key Features Simultaneous recording: Records WAV and MP3 files to SD and USB media at the same time. Dual Stereo & Dual Mono modes: Supports recording a second mono or stereo file at -10dB for safety tracks on the same media. Simple operation: Powers up in record-ready mode for immediate use. Flexible connectivity: Balanced XLR and unbalanced RCA inputs and outputs. Compact design: Space-saving 1RU rackmount unit suitable for installers and contractors. Specifications System: Solid-state SD/USB audio recorder/player Compatible Media: USB Device (mass storage class), SD/SDHC, SDXC (FAT16, FAT32) Supported File Formats: MP3: 44.1 kHz sampling frequency; 192, 256 kbps recording; 64 - 320 kbps and VBR playback; MPEG1 Audio Layer 3 format; .mp3 file extension WAV: 44.1, 48 kHz sampling frequency; 16-bit (44.1 kHz), 24-bit (48 kHz) bit depth; Waveform Audio File Format; .wav file extension Number of Channels: 2 channels / stereo Audio Frequency Range: 10 - 20 kHz (±1.0 dB recording, ±0.8 dB playback) Signal-to-Noise Ratio: Recording: > 95 dB (1 kHz, 0 dB A-weighted) Playback: > 95 dB (1 kHz, 0 dB A-weighted) Channel Separation: Recording: > 80 dB (1 kHz, 0 dB A-weighted) Playback: > 90 dB (1 kHz, 0 dB A-weighted) Wow and Flutter: Distortion: Recording: Playback: Total Harmonic Distortion: Inputs: Balanced XLR: Nominal level: +4 dBu ± 1 dBu Minimum level: -40 dBu Maximum level: +20 dBu ± 1 dBu Input impedance: 18 kΩ Unbalanced RCA: Nominal level: -10 dBV ± 2 dBV Outputs: Balanced XLR: Nominal level: +4 dBu ± 1 dBu Maximum output level: +20 dBu ± 1 dBu Output impedance: 600 Ω ± 10% Design: Compact 1RU rackmount unit