Diretta Iniezione
DI Box
A handcrafted direct injection box — a compact, AC-powered audio preamplifier designed for dynamic microphones, capable of cleanly converting mic-level signals to standard line-level output (-10dBV).
Features:
- Class A FET input stage with high linearity and extended bandwidth
- XLR input with adjustable gain
- Balanced or unbalanced line-level output
- Low noise, low distortion performance
- Wide frequency response
🎙️ Motivation & Design Approach
While trying to record audio using a Shure SM58 dynamic microphone directly into a Mac’s line-in jack, I encountered the usual issues: low gain, poor signal-to-noise ratio, and uninspiring tone. So, I decided to build my own solution — a clean, simple preamplifier with tone characteristics I personally enjoy.