c) How do you express it to dBu?

d) Is it using the voltage that I found in a) and use the same formula P = IV, P = I^2R, P = V^2/R to find the power?

Thank you.

An audio power amplifier has a voltage gain of 26 dB, infinite input impedance, zero output impedance, is rated at a maximum output power of 100 W into an 8 Ω resistive load, and is to be used as a headphone amplifier in a recording studio.

- a) What rms voltage would be measured across the amplifier output if it were delivering its maximum output power to an 8 Ω load?

- b) What would the rms current be through the load?

- c) What input signal level, expressed in dBu, would result in this maximum power to be delivered to an 8 Ω load? (this figure is also known as the input sensitivity)

- d) Assuming that this amplifier behaves as an ideal voltage source and thus maintains the output voltage found in part a) regardless of the value of connected load, how much power would be dissipated in the following loads?

i) 4 Ω ii) 16 Ω iii) 100 Ω