I am looking to put together a 2 channel system with Vantages and possibly a depth (if needed). If i use a Modwright or any tubed preamp with 2 outputs would it be best to use the RCA outputs from the Modwright for the Depth or connect the depth with speaker level inputs directly to the amp using speaker wire. How is this done? I will use this system primarily for music but will also connect my tv so some low bass may be needed.