DI Boxes

Question 1

DI

Answer 1

Direct injection

Question 2

3 basic functions of a DI box

Answer 2

1. Reduces instrument output level to mic level for direct input to the console
2. Changes instrument’s high impedance signal to a low impedance signal
3. Converts unbalanced output of instrument to a balanced signal

Question 3

How can we bypass a microphone when recording instruments such as keyboards, synths, electric guitars/basses, etc?

Answer 3

We can use a DI box and plug into the console at mic level

Question 4

Describe another function of a DI box?

Answer 4

It can prevent leakage between instruments when in same recording room as other acoustic instruments

Question 5

Some DI boxes allow high level signals ______

Answer 5

To be taken from external speaker jack of an amplifier

Question 6

Some DI boxes offer a 1/4” thru output, allowing ___

Answer 6

User to record direct signal, and also take a split of that signal to an amplifier

1. A mic would be placed on the amplifier & recorded to either a separate track or combined with the direct sound & recorded to a single track
2. Thru output could also feed an effects pedal, tuner, etc

Question 7

Passive DI boxes

Answer 7

Do not require power to operate
Impedance matching transformer with a balanced output
Quality of this transformer is a main factor in the overall sound of it

Question 8

Active DI boxes

Answer 8

Requires either phantom power sent from the mic preamp or another power source like a battery, or its own power supply (AC power)
Have more options for flexibility of manipulating the signal - filters, pads, ground lifts, impedance switchers

Question 9

Tube DI boxes

Answer 9

Enhance harmonic distortion

Needs power supply to operate