Which describes a Pi-L network?

A standard Pi-network gets its name because its schematic resembles the Greek letter pi, typically consisting of one series inductor flanked by two shunt capacitors to ground. A Pi-L network takes this classic design and adds one more component: an additional inductor placed in series at the output, which forms an 'L' section when combined with the final capacitor. This extra series inductor significantly increases the network's ability to attenuate high-frequency harmonics. Because of this superior harmonic suppression, Pi-L networks are often favored in the output stages of high-power vacuum tube amplifiers.