I’m using a SM58 microphone with a Scarlett 2i2 audio interface. How do I connect and use?

Connect SM58 to RO03 XLR input. Link RO03 output to 2i2 6.35mm Line In via XLR-TRS cable or 6.35mm TRS cable. Set 2i2 gain to minimum, then adjust RO03 gain slowly for a healthy signal level.

Can I connect two microphones to the RO03 at the same time?

No, you can only use one input at a time. The two input ports cannot work simultaneously.

Can I connect this preamp to an outdoor speaker?

Yes. Use a 6.35mm TS cable from the RO03’s TS output to the Mic or Line input on your speaker.

What’s the difference between the 3 output jacks on the RO03?

The XLR and TRS outputs are identical, offering more cable options. The TS output is an attenuated signal, ideal for connecting to non-professional devices.

Do I need to turn on 48V phantom power on my audio interface for condenser mics?

No. Simply enable the 48V phantom power on the RO03 itself.

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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RO03 Mic Preamp, 1 Input & 3 Outputs. 19-66 dB Variable gain, 5V 1A Type-C Power Input, -120 dB EIN Ultra-Low Noise, for Microphone or Instrument as DI Box

Product ID: 470901199

Details

Brand
Rodyweil
Color
Black
Compatible Devices
Amplifier PA
Connectivity Technology
XLR
Connector Type
USB Type-C
Included Components
1 * Power 1 *

🔊120dB EIN Ultra Low Noise

🔌Type-C Power for Portability

🎛️19~66dB Real-World Gain Range

KD 23.26

Duties & taxes included

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Description

🎤 Elevate Your Sound Game with Ultra-Clean, Pro-Level Gain!

NEXT GEN PORTABILITY - Powered via USB Type-C, this preamp is designed for the on-the-go creator, offering wider compatibility and reduced current noise in any recording environment.
INSTRUMENT READY INPUT - 1MΩ high-impedance TS input eliminates distortion and frequency loss, making it ideal for direct instrument recording with unmatched clarity.
OPTIMIZED GAIN CONTROL - Realistic 19~66dB gain range delivers powerful amplification without the noise spikes that plagued previous models—perfect for dynamic, condenser, and ribbon mics.
PRO TIP FOR LOWEST NOISE - Connect via TRS line input on your audio interface for the cleanest signal—avoid XLR input noise and elevate your sound quality effortlessly.
CRYSTAL CLEAR SIGNAL BOOST - Experience professional-grade noise reduction with an ultra-low -120dB EIN, ensuring your recordings are pristine and free from background hiss.

The 2026 Upgraded RO03 Mic Preamp by Rodyweil delivers professional-grade ultra-low noise performance with a -120dB EIN and a practical 19~66dB gain range. Designed for dynamic, condenser, and ribbon microphones as well as instruments, it features a high-impedance 1MΩ instrument input and Type-C power for enhanced portability. Optimized for real-world use, it ensures crystal-clear recordings with minimal noise, especially when connected via TRS line input, making it a top choice for modern content creators and musicians.

Specifications

ASIN	B0B6NG9S4C
Antenna Location	Instrument Recording, Vocal Recording
Audible Noise	75 db
Audio Sensitivity	66 db
Best Sellers Rank	#10,246 in Musical Instruments ( See Top 100 in Musical Instruments ) #11 in Microphone Preamps
Brand	Rodyweil
Built-In Media	1 * Power Adapter, 1 * Power Cord, 1 * RO03 Mic Preamp, 1 * User Manual
Color	Black
Compatible Devices	Amplifier, Audio Interface, Audio Mixer, PA System, Speaker
Connectivity Technology	XLR
Connector Type	USB Type-C, XLR/TRS/TS
Customer Reviews	4.1 4.1 out of 5 stars (142)
Frequency Response	20 KHz
Impedance	1000000 ohm
Item Dimensions	3.54 x 3.94 x 4.33 inches
Item Weight	400 g
Manufacturer	Rodyweil Audio
Mfr Part Number	RO03
Microphone Form Factor	Handheld
Model Name	RO03
Model Number	RO03
Number of Channels	1
Polar Pattern	Unidirectional
Power Source	Corded Electric
Signal-to-Noise Ratio	120 db
Special Feature	3 output simultaneous usable, EIN‑120dBV, extremely low noise‑floor, Variable gain: 19~66db, with +4dbU & -10dbV output
UPC	616859152007

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