If you get satisfactory volume I don't think there's any reason to add an amp specifically, but an external dac/amp combo could still be beneficial since you can have a better quality dac that's also isolated from the other circuitry within the laptop (which can add noise). It depends on the laptop though, some have quite good sound cards that are relatively well isolated whereas others I've used have sounded crappy without an external dac/amp.
musselkid t1_iuj0haf wrote
Reply to comment by IUseWeirdPkmn in When you bought an audiophile headphone for the first time but it doesn't sound that good by GLikesSteak
If you get satisfactory volume I don't think there's any reason to add an amp specifically, but an external dac/amp combo could still be beneficial since you can have a better quality dac that's also isolated from the other circuitry within the laptop (which can add noise). It depends on the laptop though, some have quite good sound cards that are relatively well isolated whereas others I've used have sounded crappy without an external dac/amp.