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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2026 Upgraded RO03 Mic Preamp, 120db EIN Ultral Low Noise Booster, for Dynamic & Condenser & Ribbon Microphone & Instrument, XLR/TRS Line Out, Type C Powered,with Build in 48V

2026 Upgraded RO03 Mic Preamp, 120db EIN Ultral Low Noise Booster, for Dynamic & Condenser & Ribbon Microphone & Instrument, XLR/TRS Line Out, Type C Powered,with Build in 48V

Product ID: 470901199

Details

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

🔊120dB EIN Ultra Low Noise

🔌Type-C Power & 1MΩ Instrument Input

🎛️19~66dB Real-World Gain Range

¥17455

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Description

🎤 Elevate Your Sound Game with Noise-Free Precision!

OPTIMIZED GAIN CONTROL - Realistic 19~66dB gain range ensures powerful amplification without the annoying background hiss.
UNIVERSAL TYPE C POWER - Enhanced portability and compatibility with modern power sources, perfect for on-the-go creators.
SMART CONNECTIVITY TIPS - Maximize sound quality by connecting via TRS line input—ditch the noise and elevate your recordings.
CRYSTAL CLEAR SIGNAL BOOST - Experience professional-grade noise reduction with an ultra-low -120dB EIN for pristine audio clarity.
PRO GRADE INSTRUMENT INPUT - 1MΩ high-impedance TS input preserves your instrument’s true tone and dynamics flawlessly.

The 2026 Upgraded RO03 Mic Preamp delivers ultra-low noise performance with a -120dB EIN, a practical 19~66dB gain range, and a high-impedance 1MΩ instrument input. Powered via versatile Type-C, it supports dynamic, condenser, and ribbon microphones, offering professional-grade clarity and portability for modern recording setups.

Specifications

ASIN	B0B6NG9S4C
Antenna Location	Instrument Recording, Vocal Recording
Audible Noise	75 db
Audio Sensitivity	66 db
Best Sellers Rank	#6,614 in Musical Instruments ( See Top 100 in Musical Instruments ) #8 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	Type C, XLR/TRS/TS
Connector Type	USB Type-C, XLR/TRS/TS
Customer Reviews	4.2 4.2 out of 5 stars (140)
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	108
Special Feature	EIN -120dbV, Gain: 19~66db, Max Output: +26dbU, Power: 5V 1A (Type C), THD+N: 0.0035%
UPC	616859152007

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¥17455

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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