Royer Labs SF-24V Tube Stereo Ribbon Microphone • Vacuum Tube

The Royer Labs SF-24V is the pinnacle of stereo ribbon microphones, offering lush, smooth sound pickup with unmatched stereo imaging and transient response. Built with proprietary vacuum tube electronics, the SF-24V provides a rich midrange with extraordinary clarity and detail. Based on the award-winning R-122V tube ribbon mic, the SF-24V is designed for critical stereo miking in orchestras, choirs, and high-end studio applications.

Features

• Vacuum Tube Circuitry: Delivers high output and perfect impedance matching
• True Stereo Recording: Blumlein and M-S configurations from one microphone
• High SPL Handling: Zero distortion at maximum SPL
• Ultra-low Noise: Self-noise below 18 dB, ideal for quiet recording environments
• Wide Frequency Response: Uniform from all angles with minimal off-axis coloration
• Matched Ribbon Pair: Dual 1.8-micron ribbons in a coincident setup

Recommended Applications

• Orchestras, choirs, string and brass sections
• Acoustic instruments (piano, guitar, harp)
• Drum overheads, ambiance, and stereo recording
• Ideal for critical “you-are-there” recordings in mono or stereo

Electronics

The SF-24V’s circuitry uses military-grade 5840 vacuum tubes with a triode cathode follower design, ensuring low-noise performance and long cable drive capabilities. It is protected from phantom power and electrical faults, with a Jensen transformer providing electrically isolated, balanced outputs.

Specifications

• Transducer Type: Ribbon
• Polar Pattern: Bi-Directional/Figure-Eight
• Frequency Range: 30 Hz – 15 kHz
• Sensitivity: -38 dBV/Pa (12.6 mV)
• Impedance: 450 Ohms
• Max SPL: 130 dB
• Dimensions: 10.6 in (Length) x 1.5 in (Diameter)
• Weight: 1.28 lb

Package Contents

Includes a carrying case, power supply, mic sock, 20-foot shielded cable, RSM-24 shock mount, and IEC AC line cord.