Heresy!
It's well known that amplifiers must not have any sort of time controls, as this interferes with the Ultimate Goal, which is High Fidelity, or absolutely accurate reproduction of the original...
😁
I find that the best way to bring out the bass, is to have a large amp and speakers with decent low end extension, but if that's not an option get a graphic equaliser, as there's more control over other affected frequencies. Second best is something like my work Sansui amp, it's got a loudness button and 6 band graphic. Though I rarely use either as it sounds artificial and thumpy, apart from at very low level.