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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RO03 Mic Preamp,2026 Upgraded, 66db Gain, 120db EIN Ultra Low Noise, for Dynamic & Condenser & Ribbon Microphone & Instrument,with XLR/TRS/TS Line Out, Type C Power Input

RO03 Mic Preamp,2026 Upgraded, 66db Gain, 120db EIN Ultra Low Noise, for Dynamic & Condenser & Ribbon Microphone & Instrument,with XLR/TRS/TS Line Out, Type C Power Input

Product ID: 522293736

Details

Brand
Rodyweil
Connectivity Technology
XLR
Connector Type
XLR
Model Name
RO03
Recommended Uses For Product
Home

🎸1MΩ instrument input impedance

🔇120dB ultra low noise

🎚️66dB clean gain

Description

🎤 Elevate your sound game with pro clarity and zero noise—because your voice deserves the spotlight.

NEXT GEN PORTABILITY - Type-C power input enhances compatibility and mobility for creators on the move.
ULTRA LOW NOISE FLOOR - Industry-leading -120dB EIN ensures crystal-clear recordings without background hiss.
PRECISION GAIN CONTROL - Achieve up to 66dB of transparent, noise-free amplification tailored for real-world use.
VERSATILE CONNECTIVITY - Supports dynamic, condenser, and ribbon mics with XLR/TRS/TS outputs for seamless integration.
PRO GRADE INSTRUMENT INPUT - 1MΩ impedance input perfectly preserves your instrument’s tone and dynamics.

The RO03 Mic Preamp 2026 upgrade delivers professional-grade audio amplification with up to 66dB gain and an ultra-low noise floor of -120dB EIN. Designed for dynamic, condenser, and ribbon microphones, it features a high-impedance 1MΩ instrument input for pristine instrument tone. With versatile XLR/TRS/TS outputs and modern Type-C power input, it’s optimized for both studio and mobile recording setups, ensuring crystal-clear, noise-free sound for content creators and musicians alike.

Specifications

ASIN	B0B6NG9S4C
Antenna Location	Home
Audible Noise	75 Decibels
Audio Sensitivity	66 Decibels
Best Sellers Rank	#44,459 in Musical Instruments ( See Top 100 in Musical Instruments ) #1,477 in Condenser
Box Contents	microphone, warranty card
Brand Name	Rodyweil
Colour	Black,Transparent
Compatible Devices	Audio Interface, Mixer
Connectivity Technology	XLR
Connector Type	XLR
Customer Reviews	4.2 4.2 out of 5 stars (127)
Enclosure Material	Metal
Frequency Range	20Hz 20kHz
Frequency Response	20 KHz
Impedance Unit of Measure	1000000 Ohms
Item Dimensions	9 x 10 x 11 Centimeters
Item Weight Unit of Measure	400 Grams
Manufacturer	Rodyweil Audio
Manufacturer Part Number	RO03
Microphone Form Factor	Handheld
Model Name	RO03
Model Number	RO03
Number of Channels	1
Number of Items	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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