L pad calculator - attenuation dB damping impedance decibel loudspeaker - sengpielaudio
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• L Pad  calculator for loudspeakers •

For attenuation A (damping) use here a positive dB value as convention.
L-Pad Pic - sengpielaudio     L-Pad Formula - sengpielaudio

For attenuation A use here a negative dB value as convention.
L-Pad Formula - sengpielaudio

Calculate the resistor network
The calculator below needs a positive value for A in dB

Impedance Z: ohms   
Attenuation A:  dB  
L-pad Single resistor
R1 = Rserial:  ohms R:  ohms
R2 = Rparallel:  ohms  
Ztotal:  ohms       Ztotal:  ohms

Calculate the attenuation

Impedance Z: ohms 
R1 = Rserial:  ohms
     
 
Attenuation A:  dB  
Ztotal:  ohms  
dB Z R1 (ohms) R2 (ohms)
  -3 4 1.17 9.70
  -6 4 2.00 4.02
  -9 4 2.58 2.20
-12 4 3.00 1.34
-15 4 3.29 0.87
  -3 8 2.34 19.39
  -6 8 3.99 8.04
  -9 8 5.16 4.40
-12 8 5.99 2.68
-15 8 6.58 1.73

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