Audio Artistry Beethoven Elite

It's been a long time and I don't remember using a separate amp for the subs. However, looking at the crossover, on Bing Images, it appears that two stereo amps are necessary. Plug the output from your preamp into the crossover (left/right in) and route the left/right outs to the main amp and left/right sub-out to the subwoofer amps. Trying to remember what amp I used for the subs.

Goof Luck 

After much pondering, I believe I employed an Adcom GFA-535 for subwoofer duties. Seemed to work well. I know it wasn't anything fancy.

Thanks to both of you. I will try it and i have a friend who have some knowledge on speakers. I will get help so I will not destroy these speakers.

How are these working out?  I have the standard Beethoven's and love them.

Looking at this old thread.  it appears one of the answers would not be correct for the Elite version of the Beethovens.  The elite version had a 4 way active crossover for each channel.  The standard Beethovens had a 2 way active crossover with a passive crossover in the box attached to the panels. The elite requires 8 channels of amplification (4 for right and 4 for left).  The Elite active crossover is also XLR balanced only connections.  The elite has no passive crossovers for the panels. 

Very, very nice speakers and one of Sigfried Linkwitz's finest designs!