Home / RO-04 Pro Mic Preamp 0~72db Adjustable Gain Boost with Hi-Z, 48V, HPF, Phase for Dynamic Condenser Ribbon Microphone, Guitar, Bass Recording and Podcasting
  • RO-04 Pro Mic Preamp 0~72db Adjustable Gain Boost with Hi-Z, 48V, HPF, Phase for Dynamic Condenser Ribbon Microphone, Guitar, Bass Recording and Podcasting
  • RO-04 Pro Mic Preamp 0~72db Adjustable Gain Boost with Hi-Z, 48V, HPF, Phase for Dynamic Condenser Ribbon Microphone, Guitar, Bass Recording and Podcasting
  • RO-04 Pro Mic Preamp 0~72db Adjustable Gain Boost with Hi-Z, 48V, HPF, Phase for Dynamic Condenser Ribbon Microphone, Guitar, Bass Recording and Podcasting
  • RO-04 Pro Mic Preamp 0~72db Adjustable Gain Boost with Hi-Z, 48V, HPF, Phase for Dynamic Condenser Ribbon Microphone, Guitar, Bass Recording and Podcasting
  • RO-04 Pro Mic Preamp 0~72db Adjustable Gain Boost with Hi-Z, 48V, HPF, Phase for Dynamic Condenser Ribbon Microphone, Guitar, Bass Recording and Podcasting
  • RO-04 Pro Mic Preamp 0~72db Adjustable Gain Boost with Hi-Z, 48V, HPF, Phase for Dynamic Condenser Ribbon Microphone, Guitar, Bass Recording and Podcasting
  • RO-04 Pro Mic Preamp 0~72db Adjustable Gain Boost with Hi-Z, 48V, HPF, Phase for Dynamic Condenser Ribbon Microphone, Guitar, Bass Recording and Podcasting
  • RO-04 Pro Mic Preamp 0~72db Adjustable Gain Boost with Hi-Z, 48V, HPF, Phase for Dynamic Condenser Ribbon Microphone, Guitar, Bass Recording and Podcasting
  • RO-04 Pro Mic Preamp 0~72db Adjustable Gain Boost with Hi-Z, 48V, HPF, Phase for Dynamic Condenser Ribbon Microphone, Guitar, Bass Recording and Podcasting

RO-04 Pro Mic Preamp 0~72db Adjustable Gain Boost with Hi-Z, 48V, HPF, Phase for Dynamic Condenser Ribbon Microphone, Guitar, Bass Recording and Podcasting

With up to 72dB of clean gain, RO-04 makes even the faintest sounds or distant voices come through full and detailed. Perfect for high-impedance dynamic mics like the Shure SM58, SM7B, or MV7X—unlock their true tone and let them perform at their best, without straining to be heard.
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  • Detail
    The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. Merchant Video

    This mic preamp is engineered for quiet, professional performance. With an EIN of –120 dBV and a noise floor of –104 dBV, it delivers clean gain even at high levels—perfect for low-output dynamic microphones. A THD of only 0.0035% ensures minimal distortion and accurate sound reproduction. The result is a clear, transparent signal that preserves the natural tone of your microphone without added noise or coloration.

    The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. Merchant Video

    The RO04 features a specially engineered power circuit that minimizes current noise caused by inconsistent power sources, ensuring stable and quiet performance across different environments. With a USB Type-C power input, it can be powered easily by standard phone chargers or power banks. This flexible design makes the RO04 ideal for outdoor recording, live streaming, and stage performance—delivering reliable power wherever you need it.

    The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. Merchant Video Mic input impedance5900ΩHi-z input impedance1MΩXLR max output+24dBu @ 1KHz1/8 inch max output+10dBuEIN-120 dbVNoise-104 dbV (22~22KHz Unweighted)THD0.0035% @ 1KHzFrequency response-0.2dB@10Hz-2.9dB@120KHz

    A preamp amplifies all signals — including noise. To get a clean sound, start by improving your recording environment with basic sound treatment. Next, set your gain properly to avoid overload or distortion. Finally, use a noise reduction plugin in post-processing. With these steps, you’ll achieve a clear and professional sound.

    The performace of sm58 with and without RO04

    Ultra-Low Noise Performance for Clean, Professional Audio

    Two-stage gain control: stepped gain plus trim

    Advanced Power Design for Clean and Flexible Operation

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    How can I avoid noise in my recordings?

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