answers: wider
context: gain inverting op-amp. Fourth-order Linkwitz–Riley crossovers (LR4) are probably today's most commonly used type of audio crossover. They are constructed by cascading two 2nd-order Butterworth filters. Their slope is 24 dB/octave (80 dB/decade). The phase difference amounts to 360°, i.e. the two drives appear in phase, albeit with a full period time delay for the low-pass section. Eighth-order Linkwitz–Riley crossovers (LR8) have a very steep, 48 dB/octave (160 dB/decade) slope. They can be constructed by cascading two 4th-order Butterworth filters. Linkwitz–Riley filter A Linkwitz–Riley (L-R) filter is an infinite impulse response filter used in Linkwitz–Riley audio crossovers, named after its </s> Double-tuned amplifier A double-tuned amplifier is a tuned amplifier with transformer coupling between the amplifier stages in which the inductances of both the primary and secondary windings are tuned separately with a capacitor across each. The scheme results in a wider bandwidth and steeper skirts than a single tuned circuit would achieve. There is a critical value of transformer coupling coefficient at which the frequency response of the amplifier is maximally flat in the passband and the gain is maximum at the resonant frequency. Designs frequently use a coupling greater than this (over-coupling) in order to achieve an even wider </s> produces an overall system that is more linear and reduces the amplifier's distortion. In essence, "inverse distortion" is introduced into the input of the amplifier, thereby cancelling any non-linearity the amplifier might have. Predistortion is a cost-saving and power efficiency technique. Radio power amplifiers tend to become more non-linear as their output power increases towards their maximum rated output. Predistortion is a way to get more usable power from the amplifier, without having to build a larger, less efficient and more expensive amplifier. Another important consideration in design of RF power amplifiers is the memory effect or amplifier nonlinear dynamics.
question: effect of cascading double tuned amplifier on bandwidth