Actually i have two 85 Watts speakers each someone gave me few months ago. I wanto know if i can connect them through 3.5mm jack to my laptop, which has a Conexant SmartAudio soundcard, built in motherboard. I asked my electrician and he said you need an amplifier for them to run properly and produce good sound, but when i told him i wanted to connect them to my laptop he said you have to check if it can handle 85x2 watts of speakers. Also do i need an amplifier or a good audio software will be able to produce best sound with these speakers.
there is no way that your motherboard soundcard can achieve the whole 85 watts! ABSOLUTELY NO WAY
but sure, they will play from your onboard sound, albeit rather quietly...
which speakers are they? and whats their ohm rating?
you'll definitely need a amplifier
AFAIK external speakers are independently powered via mains power so they should work fine.