Peachtree Audio Nova as. Preamp questions

You're right, I should have mentioned that the sub is the Martin Logan Dynamo 500, not the 300 which does have speaker connections. I spoke with the Peachtree guys who agree that splitting the line level signal from the preamp to the amp and sub is the best approach. Thanks for your input once again and I'll be more careful in the future to provide more complete info when asking for help. BTW, I received the Ethos speakers today and I'm mightily impressed.

In your first post, you said that you ordered the small sub but didn't give a model. I assumed it was a Dynamo 300. Even if you ordered a different model, still go to ML's web site and have a look at it anyway. You'll notice in the pictures that is has speaker cable terminals on it. They don't put them there to power the sub. They're used a interconnects. So when you run a speaker cable from the binding posts on your speakers to the sub, its only used to transfer signal. The internal amp still drives the speaker. Its a very common way to connect a sub.