Description
Direct Box Transformer VTXDB2
11.5 : 1+1 step down ratio for line level to mic level conversion
High Performance Direct Box Transformer VTXDB2 – A direct box transformer is a key component in a direct injection (DI) box, a device used to connect high-impedance, unbalanced audio sources (like electric guitars, basses, or keyboards) to low-impedance, balanced inputs (like those on mixers or audio interfaces). The transformer inside the DI box performs several critical functions to ensure clean, noise-free audio signal transfer.
Direct Box (DI Box) Transformer VTX-D2
- D.I. for electric guitar
- Coupling instrument pickups to low impedance microphone inputs
- Converts unbalanced line level (high impedance) instrument signals to balanced microphone input level for direct connection to a mixing desk.
- Eliminates hum.
- Long cable runs without HF loss
- Connect pins 2, 3 & screening can to DI box ground
- Features:
High nickel content core for low distortion
Electrostatic screens and mu-metal screening can for up to 30dB noise rejection
Transformer Data Sheet – Click to open and DOWNLOAD
Electrical characteristics
Turns ratio: 11.5 to 1+1
DC resistance (Ω +/-15%):
(1 – 4): 3.3k
(5+6 – 7+8): 67
Input impedance: 140kΩ (1k load)
Output impedance: 150Ω (8k load)
Maximum input level @ 20Hz with <1% distortion: +21.5dBu
Interwinding capacitance @ 10kHz:
(1,4) to (5,8): 90pF (typ.)
(1,4) to scr: 160pF (typ.)
(5,8) to scr: 190pF (typ.)
Leakage inductance (1 – 4) @ 1kHz: 150mH (typ.) (5, 6, 7, 8 S/C)
Voltage gain (@1kHz, 0dBu): -22dBu +/- 0.2
Insertion loss: 0.7dB (typ.)
Proof voltage: winding to winding: 250Vrms
screens to windings: 250Vrms
