By installing a newer / better sound card, and purchasing higher quality speakers. Using MP3s and other formats with a higher sampling ratio will also improve the way it sounds.
speakers
In sound quality it doesn't change it's still the same amp. The only thing that will happen is that it plays louder
modem
A sound card upgrade is not neccessaey when changing your speakers.
the speed and the memory it can store. also by how good the model is and if the upgrade is vista windows or lower upgrade.
no That is for early computers
For most consumers and computers, a USB sound card typically can run for around 40 to 60 dollars depending on the quality and manufacturer of the device in question.
sound quality
Most people upgrade their processor, ram, video, and sound cards for gaming.
Sound quality can be improved by getting better speakers and purchasing a quality reciever.
Original Sound Quality was created in 2002.
In the 1940’s through the 1990’s TV didn’t upgrade. To get a more modern TV you had to buy the latest model. Only with WiFi and Bluetooth and computers is there upgrade ability.