Hi Phd -
I suspect you mean to say that your speakers are "bi-wireable." This simply means that separate inputs are provided for the high-pass and low-pass sections of the internal crossover network. To say that they are "bi-ampable" suggests that they have a separate set of inputs that bypass the internal crossover and connect directly to the drivers, and this is very unusual.
If they are bi-wireable as I suspect, the maximum power the drivers can absorb stays the same whether-or-not the jumpers are installed.
Speaker power ratings are notoriously vague. To say "the high frequency drivers cannot exceed 50 watts" doesn't really provide much useful information. We need to know if they are talking about peak or average power, under what conditions, and for how long in order to have some understanding of what the limits actually are. If the manufacturer is suggesting that the tweeters can handle up to 50 Watts RMS for any appreciable length of time, that is a *LOT* of power for a tweeter!
In any event, the answer to your question is yes - you can safely drive both inputs from the same amplifier. The vast majority of our listening is done at relatively low *average* power - just a few Watts, typically. Peak power may be quite high, but only for a fleeting instant. Your speakers will handle this without any problem.
Best regards,
Steve McCormack
www.SMcAudio.com
