RO-04 Mic Preamp, 0~72db Adjustable Gain Boost,-120db EIN Ultra Low Noise, Studio Grade Performance with Hi-Z, 48V, HPF, Phase for Instrument & Microphone | Ultra Low Noise,Studio Grade Performance with Hi-Z, 48V, HPF, Phase for Instrument & Microphone

About this item

• –120 dBV EIN for Ultra Low Noise: With an exceptionally low –120 dBV Equivalent Input Noise, the RO04 mic preamp effectively eliminates the common problem of rising noise when pushing an audio interface's gain. Instead of relying on noisy interface preamps, the RO04 delivers strong, clean gain while maintaining an extremely low noise floor. This allows you to capture clear, detailed audio, resulting in recordings that sound clean, transparent, and professional.
• 0–72 dB Wide Gain Range for Any Mic and Any Application: With an adjustable gain range from 0 to 72 dB, the RO04 mic preamp easily adapts to virtually any recording situation. It provides ample clean gain for low-output microphones such as the Shure SM58 and SM7B, while also offering precise control for vocals, podcasting, live streaming, quiet sources, and distant recording applications. Whether you’re capturing subtle details or driving demanding dynamic microphones, the RO04 delivers consistent, controlled performance across every use case.
• Streaming-Friendly Dual Output for Mobile and Desktop Setups: To support the rapidly growing live streaming market, the RO04 is designed with two dedicated output levels to match different recording environments. One output is optimized for professional audio equipment and computer-based interfaces, while the other is tailored for consumer and mobile streaming devices that require a different input level. Whether your livestream or podcast setup runs on a smartphone or a computer, the RO04 integrates seamlessly — delivering proper signal matching, stable levels, and reliable performance in any configuration.
• Worry-Free Power with Universal USB-C and Power Bank Support: To maximize flexibility and eliminate power limitations during live streaming and mobile use, the RO04 features a uniquely engineered power circuit combined with a universal USB Type-C input. It can operate reliably even when powered by a standard power bank — while still maintaining full 48V phantom power support. This design greatly enhances portability and convenience, allowing you to livestream, record, or perform anywhere without worrying about power availability
• Dual-Input Design for Microphones and Instruments:The RO04 features a dedicated Mic input with 8.9 kΩ impedance and a separate Instrument input with 1 MΩ impedance, along with built-in 48V phantom power. This allows it to properly match dynamic microphones, condenser microphones, ribbon microphones, and a wide range of instruments such as guitar and bass. Because the mic and instrument inputs use independent circuits and impedance designs, you can sing and play at the same time while maintaining optimal signal integrity, full frequency response, and consistent audio quality — without signal loss or tonal compromise.