Derek:
In general, if you were to use the preamp out of receiver #1 to the main input connections (or some similar nomenclature) of receiver #2 ... all that you would be doing, would be substituting one unit's preamp section for another. Receiver #1 would only be a preamp at this point, as you would be bypassing its power amp section.
What's interesting though is your need for power. The Athenas are fairly efficient speakers (91db) and Harman Kardon amplifiers have historically been based on a high current design and they are also pretty upfront about their power measurements ... so unless your room is very large or your loudness preferences are extremely high, I would think that you should have sufficient power.
The one thing that I see missing from your set-up is a sub-woofer. Since the bass eats up the most juice, a powered (as opposed to passive) and powerful (150 watts) sub-woofer may be your answer. As for bi-amping, I am not sure if I would even explore attempting to bi-amp your front speakers ... though I guess it is possible. Some other a'goner would need to run you through how you would do this in a HT environment.
Regards, Rich
In general, if you were to use the preamp out of receiver #1 to the main input connections (or some similar nomenclature) of receiver #2 ... all that you would be doing, would be substituting one unit's preamp section for another. Receiver #1 would only be a preamp at this point, as you would be bypassing its power amp section.
What's interesting though is your need for power. The Athenas are fairly efficient speakers (91db) and Harman Kardon amplifiers have historically been based on a high current design and they are also pretty upfront about their power measurements ... so unless your room is very large or your loudness preferences are extremely high, I would think that you should have sufficient power.
The one thing that I see missing from your set-up is a sub-woofer. Since the bass eats up the most juice, a powered (as opposed to passive) and powerful (150 watts) sub-woofer may be your answer. As for bi-amping, I am not sure if I would even explore attempting to bi-amp your front speakers ... though I guess it is possible. Some other a'goner would need to run you through how you would do this in a HT environment.
Regards, Rich