jokomo Can I bi-amp my speakers with two different amps?
Put the amp with the better controlled bass on the bass
https://www.av2day.com/wp-content/uploads/2014/05/biamp1.jpg
Use this on input of the amp that's louder, so you can equalize the gains (volume)
https://www.schiit.com/products/sys
Use a pair of these from your preamp
https://www.ebay.com/itm/Valab-Gold-Plated-RCA-Y-Splitter-Adapter-1-Male-to-2-Female-RCA-Adapter-1pcs/283760200309?hash=item42116d0a75:g:RXwAAOSwGBhaYNGt
Cheers George