Yeah I don't put amps in my diy subs for sure. OTOH if done well it shouldn't be a particular issue. I think there is an external option?\n\nI have not heard of any options on the Legacy speakers for Active External Amps.\n\nBut that why I recommend to bi-amp the dual 12” woofers using an external sub amp. It wouldn’t be 100% true active bi-amp because the internal XO is still there, but you get independent control of the dual 12” woofers with the sub amp - the sub amp volume will control how much bass is being output - independent of the midrange and tweeter.\n\nThis was the reason I was going to get a pair of the Focus SE for my HT room - to bi-amp those dual 12” woofers. But my wife decided to spend money on something else.