Behringer Tube Ultragain MIC100 Audiophile Vacuum Tube Preamplifier with Limiter High-end preamplification for all microphone, instrument and line-level sources. Complements especially your studio-grade condenser mics Perfectly matches your studio, live and hard disk recording setup Hand-selected 12AX7 vacuum tube with UTC technology for exceptional warmth and lowest noise Ensures outstanding signal transparency when used as a high-end DI-box Sophisticated output limiter prevents the output signal from being distorted