Bridging tweeter with two stereo exciters

Hi all,

I am building a speaker using two Dayton 8 ohm 10 watt exciters and an 8 ohm tweeter. It is being powered by a 2.1 amplifier with dsp (Arylic). I currently have the tweeter and exciters in two different channels and am running in mono, the tweeter has one capacitor. I am wondering if it is possible to run the two exciters in stereo, and bridge the tweeter so that it is in mono? The amplifier does not state the impedance range, for sure 4 ohm but I am not sure how it will do with below that, others say it is fine but not positive.