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Measuring input impedance and calculating output …
http://www.sengpielaudio.com/calculator-InputOutputImpedance.htm
The output impedance of a device can simply be determined. We use a load resistance R load, to load the signal source impedance Z source.The output voltage is open initially without load as open-circuit voltage V 1 (Switch is open, that means R load is infinity) and then measured as V 2 under load with R load at point IN (Switch is closed). Then the found values V 1, R load and V 2 …
Impedance matching impedance bridging interface ...
http://www.sengpielaudio.com/calculator-bridging.htm
impedance matching and impedance bridging an interface connecting Z in and Z out circuit dampening damping factor - no matching in audio - DF resistor pad audio engineering sound recording - Eberhard Sengpiel - sengpielaudio
L pad calculator - attenuation dB damping impedance ...
http://www.sengpielaudio.com/calculator-Lpad.htm
L pad calculator impedance attenuation damping dB decibel loudspeaker speaker voltage divider - Eberhard Sengpiel sengpielaudio
dB calculate - decibel calculation dB calculator voltage ...
http://www.sengpielaudio.com/calculator-db.htm
without regard to the impedance. So a "power amplifier" which needs an input of 1.5 V from a 1000 ohms source to give an output of 30 V into 8 ohms is spoken of as having a gain of 20 × log (30/1.5) = 20 × log (20) = 20 × 1.3 = 26 dB. So "dB" is simply another way to write "ratio of".
Voltage current resistance and electric power general ...
http://www.sengpielaudio.com/calculator-ohm.htm
The nominal impedance Z = 4, 8, and 16 ohms (loudspeakers) is often assumed as resistance R. Ohm's law equation (formula): V = I × R and the power law equation (formula): P = I × V. P = power, I or J = Latin: influare, international ampere, or intensity and R = resistance. V = voltage, electric potential difference Δ V or E = electromotive force (emf = voltage).
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