Using speakers of course... did you expect like some telepathic bond or something?
Seriously though most the time no phones, just the unit as the speakers are good enough. BUT...when I want to jam out I have this jack->RCA plug (2 of them) and one is in my tall PC speakers, and then another is popped into my 5.1 system. A few games truly get epic sounding with that, many (well all) isn't a requirement for it but could be a bit more enjoyable as DS pops out some amazing quality audio.
Seriously though most the time no phones, just the unit as the speakers are good enough. BUT...when I want to jam out I have this jack->RCA plug (2 of them) and one is in my tall PC speakers, and then another is popped into my 5.1 system. A few games truly get epic sounding with that, many (well all) isn't a requirement for it but could be a bit more enjoyable as DS pops out some amazing quality audio.












