He is NOT trying to connect two pairs of speakers, nor is he trying to bi-amp the speakers.
He wants to use the Klipsch speakers with two different systems (receivers):
- his home theater/surround system, where they serve as front speakers
- a two channel system, using a Pioneer two channel receiver
OP, fI suggest you just forget about the fact that each speaker has two sets of terminals. As I mentioned earlier, these are for users who want to bi-amp or bi-wire the speakers. This is NOT what you are asking about.
With the jumpers in place, either set of terminals serves to connect the signal from the amplifier to both the tweeter and woofer. So, connecting a second amplifier to the terminals not being used by the first amplifier would mean that the speaker is getting signal/power from two different amplifiers at the same time, and that the outputs of the two amplifiers are effectively connected together (via the jumper). Not a good thing...even if you are very careful never to have both amplifiers turned on at the same time (which of course will accidentally happen at some point).
With the jumpers removed, one set of terminals feeds the woofer and the other feeds the tweeter. You can connect separate amplifiers in this scenario,
assuming that they are both getting their signal from the same source component, with one driving the tweeter and one driving the woofer. This is a form of bi-amping. However, this is not what you are asking about.
With the jumper removed and with the surround receiver connected to, for example, the woofers, and the Pioneer connected to the tweeters, the woofer will play the signal from the surround receiver and the tweeters will play the signal from the Pioneer. Could be interesting I guess...Grateful Dead thru the woofers and Lady Gaga thru the tweeters.