showstack / glossary / di-box
DI box DI 盒
A box that converts a high-impedance, unbalanced instrument output into a low-impedance balanced mic-level signal that can run down a long multicore without picking up noise. Passive types use a transformer; active types need phantom or a battery.
中文
把高阻抗、非平衡的樂器輸出轉換成低阻抗平衡麥克風位準訊號的設備，使訊號能走長距離多芯線而不拾取雜訊。被動式使用變壓器，主動式則需幻象電源或電池。
Regional usage
| Where | Term | Note |
|---|---|---|
| UK | DI box | |
| US | DI / direct box | |
| HK / TW | DI 盒 / 直入盒 |
Easy to get wrong
A ground-lift switch on a DI lifts the shield at the box end only. It fixes hum from a ground loop; it does not fix hum from a bad mains supply, and it never makes an unsafe rig safe.
Next to this
Phantom power幻象電源48 volts DC sent up the same balanced pair that carries the microphone signal, to power a condenser capsule o…Line check線路檢查Verifying every input reaches the console: mic by mic, DI by DI, before anyone plays a note. A soundcheck wit…
Sources
- Theatrecrafts glossary of technical theatre terms — Theatrecrafts / ABTT heritage primary
Understand the mechanism
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