6. Mic Level Leads

Mic level signals are very low indeed, and so in order to avoid the interference problem already mentioned, an additional technique is employed, known as balancing. This requires 2 signal wires and a screen, so the XLR is the connector of choice.

Advantages of Balancing

  • It discriminates against noise and crosstalk very effectively
  • A balanced output produces 6dB more signal level on the line
  • It removes the possibility of ground-loops.
balanced_unbalanced

How it Works

Microphones - or any other balanced feeds - are designed such that the same signal is output on both of the signal wires (conventionally called hot and cold), except that one wire carries an exact mirror image of the other - in other words, the two signals are 180 degrees out of phase. These signals are carried to the receiving device where a differential amplifier inverts the phase of one of the signals, and electrically adds it to the other. The resultant signal is twice the magnitude of the originals, but most importantly, any stray noise picked up in the wires along the way is almost completely cancelled out by the summing process.

Adapter Leads

Sometimes it may be necessary to use a balanced microphone with a non-balanced jack input. For this you will need an adapter lead going from XLR to jack - the cold signal wire will be connected to the screen, either within the XLR or at the jack end. Note that when adapters like this are used, the noise cancelling properties of the balanced line will be lost, and phantom powered microphones will fail to operate.

To go from unbalanced to balanced, a DI box should be used. Why? Because balanced inputs are usually low impedance. If we drive them directly from an electric guitar for example (high impedance), then we break the 'rule of 10'. DI boxes have high impedance, and will buffer our guitar signal and present the balanced input with what looks like a mic signal.

I tuoi contatti

Prodotti con le migliori valutazioni

  1. Cordial CTM 5 FM-GN

    Cor­dial CTM 5 FM-GN

    disponibile
    € 16,60
  2. Sommer Cable Galileo 238 2,5

    Sommer Cable Galileo 238 2,5

    disponibile
    € 28
    € 35,13
  3. Sommer Cable Galileo 238 10,0

    Sommer Cable Galileo 238 10,0

    disponibile
    € 39
    € 49,58
  4. Cordial CTM 5 FM-RD

    Cor­dial CTM 5 FM-RD

    disponibile
    € 16,60
  5. Sommer Cable Stage Blue Line Vocal 1,5m

    Sommer Cable Stage Blue Line Vocal 1,5m

    disponibile
    € 9,90
    € 11,90
  6. Cordial CTM 3 FM BL

    Cor­dial CTM 3 FM BL

    disponibile
    € 14,70
  7. Sommer Cable Galileo 238 5,0

    Sommer Cable Galileo 238 5,0

    disponibile
    € 33
    € 41,46
  8. Cordial CPM 10 FM-Flex

    Cor­dial CPM 10 FM-Flex

    disponibile
    € 27
  9. Cordial CSM 5 FM-Gold

    Cor­dial CSM 5 FM-Gold

    disponibile
    € 24,90
  10. Cordial CTM 3 FM-GN

    Cor­dial CTM 3 FM-GN

    disponibile
    € 14,70
  11. Cordial CTM 5 FM-BL

    Cor­dial CTM 5 FM-BL

    disponibile
    € 16,60
  12. Cordial CTM 3 FM-RD

    Cor­dial CTM 3 FM-RD

    disponibile
    € 14,70
  13. Cordial CPM 15 FM

    Cor­dial CPM 15 FM

    disponibile
    € 28
  14. Cordial CFM 2.5 FM

    Cor­dial CFM 2.5 FM

    disponibile
    € 11,90
  15. Cordial CTM 10 FM-GN

    Cor­dial CTM 10 FM-GN

    disponibile
    € 20,90

Marche più popolari

  • Ernie Ball
  • Doepfer
  • Mutec
  • Damar & Hagen
  • Harley Benton
  • Tiptop Audio
  • Alva
  • AKG
  • Hosa
  • Monster Cable
  • Telegärtner
  • Ambient

I prodotti più gettonati

  1. Monster Cable Classic Microphone 30 WW

    Mon­ster Cable Classic Micro­phone 30 WW

    disponibile
    € 29
    € 45
  2. the sssnake SXX8030

    the sssnake SXX8030

    disponibile
    € 23,30
  3. the sssnake SXX8050

    the sssnake SXX8050

    disponibile
    € 29
  4. the sssnake YPK2030

    the sssnake YPK2030

    disponibile
    € 3,98
  5. the sssnake SM10 BK

    the sssnake SM10 BK

    disponibile
    € 6,70
  6. the sssnake SK366-1-BLK Midi

    the sssnake SK366-1-BLK Midi

    disponibile
    € 2,55
  7. Neutrik BSX Grey

    Neu­trik BSX Grey

    disponibile
    € 0,77
  8. Neutrik NC3 MXX

    Neu­trik NC3 MXX

    disponibile
    € 2,85
  9. the sssnake IPP1030

    the sssnake IPP1030

    disponibile
    € 2,55
  10. Neutrik BXX Blue

    Neu­trik BXX Blue

    disponibile
    € 0,80
  11. Neutrik NC3FXX

    Neu­trik NC3FXX

    disponibile
    € 3,19
  12. the sssnake SM6BK

    the sssnake SM6BK

    disponibile
    € 4,99
  13. the t.bone Headphone Adapter

    the t.bone Head­phone Adapter

    disponibile
    € 2,90
  14. the sssnake PNT 22-315

    the sssnake PNT 22-315

    disponibile
    € 3,98
  15. Millenium AV 210

    Mil­le­nium AV 210

    disponibile
    € 15,90