Bi amping question


Ok, so I have never bi amped. I have always had a dual mono ss b&k. I have recently bought a set of gallo 3.5. They are not bi wired like my old vandersteens, so I am wondering how to amp them.
I was considering having the b&k modified, but I really love tubes so I am leaning towards tubed monos. The problem is cost.
After buying the gallos, I don't have another 3-4k to sink into mono amps. I was considering a jolida 502p or prima Luna prologue 6 monos. Leaning heavily towards the jolida bc at 1k I could buy one now and a second later as They are bridgeable.
But it got me thinking. Without biwireable speakers, can two stereo amps be used? Can you run biwire from the left and right outputs of a stereo amp into a single speaker input such as is found on the gallo?
If this doesn't cause an issue, is there any benefit? Being able to do this would open up the possibility of a whole host of good tube amps that could be purchased one at a time to provide the power and separation I am looking for.
I am sold on monos as I have heard the difference in soundstage and imaging in my system when going from a stereo amp to dual mono.

Thanks. This may be a newbie question but I appreciate everyone's input.

Brad.
Audible illusions modulus pre, Cary cdp, gallo reference, and b&k amp.
2out2sea
Whatever you do, do NOT combine the left and right outputs together!!! You'll toast the amp.

If the stereo amp you have doesn't have an internal way to bridge it to mono, you are stuck with a stereo only amp.

If you had two of the same amp, you could run the right channel output of one amp to the right speaker and the left channel output of the other amp to the left speaker, but you won't add any increase in power. I've seen this done numerous times, but IMHO really didn't think it provided any additional sound quality.

If you really want mono amps...buy mono amps.
Thanks for the input. That is that I guess. Just out of curiosity, what causes the amp to blow if an RCA splitter is used at the pre amp sending two left signals to one amp and two right signals to the other. Then send left and right outputs to a single speaker input? I am just curious and uneducated.
"Then send left and right outputs to a single speaker input? I am just curious and uneducated."

The amp will go up in smoke. You can't combine the 2 channels to one speaker unless the amp is bridged. If you don't believe me, then try it. You will probably blow the house circuit breaker as well. You could also cause a fire in the listening room. DO NOT GIVE IN TO TEMPTATION AND TRY IT.