What are the advantages of using an op-amp instead of LC elements in an audio filter?

Traditional passive filters made from inductors (L) and capacitors (C) naturally suffer from insertion loss. This means the output signal is inherently weaker than the input signal because the passive components absorb some of the energy. In contrast, an active filter built using an operational amplifier can provide amplification (gain) alongside the filtering action. This allows the circuit to boost the signal while simultaneously removing unwanted frequencies. Additionally, active filters using op-amps are especially popular at audio frequencies because they eliminate the need for bulky, expensive inductors, though the primary electrical advantage in this context is their ability to overcome insertion loss by providing gain.