Should I bi-amp or bridge my amps to feed my speakers

Bi amping with keep the upper frequencies from getting clipped, and more sore if there is some active XO happening.

So I would bi-amp with an active XO, or some active XO type of filter, if been a Harrison Labs RCA job.

But bridging is probably better if you need more woofer notes.

Have you considered a subwoofer, and using some filter to scrape off the low notes so that the speaker do not need the amp to play them loudly?

i have considered a small sub woofer, but haven’t made a move on it. 

@kellymack ^That^ often gives the most boost.

And if done right it is more like bi-amping… Basically the sub notes get largely  striped off, from the main speakers.

if you already had two stereo amps, then just try it, but $ for $ a sub is usually the most effective.

I have heard those speakers with and without subs at a dealer in Portland and the spatial difference was not subtle. They were also spread farther apart from each other than "normal" and severely toed in. I don't remember which amps were driving them but I'm sure there was more power than the 35 wpc you are using.

I am not sure that we know that for sure…

The amount of power in the 20–80 Hz region depends on the music, and the system with the subwoofer May have been <35 wpc, and the sub well over 100 watts.

We sort of don’t know, but it is possible to significantly lower the amount of power by adding the sub.

@aewarren 
Can you further describe the “not subtle” difference?