Resonance maximizes driven power only at the cost of heating.

Evidence

Resonance at the oscillator frequency is an impedance maximum, because if we control the velocity (the denominator in Z = F/V) of the drive, large forces (the numerator in Z) will be required to maintain the velocity on resonance (see also section 10.6). Driving the mass and spring on resonance also corresponds to maximum power supplied by the drive, determined by the friction. The power simply heats the system. — Eric J. Heller, Why You Hear What You Hear- An…, 1048

Categorization

• DEFINE: Explains why resonance appears as an impedance maximum when drive velocity is controlled.