7 speakers, 1 port

OK, so I've got a bunch of speakers lying around so I thought I'd make a home made "surround sound"... the reason I use "" is because it's not technically true surround sound as I'm using the standard stereo port on my computer, but I'm feeding that signal into a tiny breadboard to which I can attach lots of speakers, the end result is that I've got 7 speakers operating on two channels (standard left/right stereo).

My only thing is, I now have 7 speakers drawing current from 1 port which is meant to supply 2 speakers, could this put a high, potentialy damaging, drain on the port/computer?

Actually the comp can handle it, looking at PSU supply/current useage but could the stereo port or anything else be damaged by the higher-than-normal current?

(The audio is all intergrated - What I'm doing costs £3 (for a new stereo jack that I can wire myself) but obviously that is very cheap, I don't want to go and spend £20 on a proper sound card, it makes it almost 7 times more expensive and I'm not that fussed!)