An organization I work for received an old pair of Bose speakers as a donation. The speakers themselves are passive, so they need an amplifier. Unfortunately, I can't recall the model number of the speakers, but they appear to be mid-to-late 90s. We also have multiple audio sources (DVD player, cable box, and computer) that need connected to the speakers.
My suggestion was to purchase a mixer or stereo receiver with multiple inputs so that the inputs could all be easily connected to the single pair of speakers. This would also give us control over the levels for the different audio sources.
However, someone else in the organization suggested just shoving the bare speaker wire from all of the audio sources into the speaker terminals on the amp. The amp doesn't contain a mixer or anything built-in.
Wouldn't this particular setup be potentially dangerous to the speakers? If it even would work at all? Wouldn't a mixer be the preferred solution to this type of problem?