Royer Labs Line dB Booster2 In-Line Signal Booster and DI

The Royer Labs dBooster2 is a versatile two-channel in-line signal booster and DI, designed to enhance the performance of passive ribbon and dynamic microphones and serve as a high-impedance direct input for instruments. Each channel offers switchable gain settings of 12 dB and 20 dB in Mic Mode and can provide a clean gain boost with minimal distortion. When used as a DI, the dBooster2 delivers either 0 dB or 8 dB of gain, ideal for high-impedance guitar and bass signals.

The dBooster2 features Class A input circuitry that presents a high impedance to minimize mic loading, preserving tonal accuracy and headroom. The low-impedance output allows it to drive long cable runs and digital interfaces with ease, while protecting ribbon mics from phantom power damage. Engineered for flexibility, the dBooster2 supports professional audio setups with ultra-low noise, high headroom, and minimal distortion.

Recommended Applications

• Amplifying low-output microphones (ribbon, dynamic)
• Recording to DAW interfaces
• Maintaining signal quality over long cable runs
• Direct input for electric guitar, bass, and other instruments

Features

• Gain Stages: 12 dB and 20 dB (Mic Mode); 0 dB and 8 dB (DI Mode)
• High Input Impedance: 3.6 kOhm (Mic Mode), 270 kOhm (DI Mode)
• Low Output Impedance: 300 Ohms (20 dB setting)
• Construction: Durable, compact design
• Performance: Ultra-low noise and distortion
• Frequency Response: 20 Hz – 20 kHz ±0.25 dB
• Compatibility: Safe for all ribbon mics, prevents phantom power damage

Specifications

• Gain: 12 dB or 20 dB (Mic Mode); 0 dB or 8 dB (DI Mode)
• THD+N: 0.0015% at 20 dB gain
• Self-Noise: <11 dBa (20 dB setting), <15 dBa (12 dB setting)
• Headroom: 127 dB (20 dB setting), 120 dB (12 dB setting)
• Power: 48V phantom
• Dimensions: 3.9 in x 2.0 in x 1.6 in
• Weight: 0.6 lb