fvang
The EP350 is a powered sub and so YES it does have a built in amp and so NO you don't need an additional amp to drive the sub.
I believe the EP350 has both High and Low level inputs.
The sub pre out you are refering to on the Yammy is a low level output that should be connected to the low level input on the EP350. You'll need a cable with RCA plugs on both ends to make this connection.
The sub pre-out on the Yammy amp is not an amplified signal. The EP350 will amplify this signal using its own internal amp.
No damage will occur if you connect the sub pre-out of the yammy to the low level input on the Ep350.
Can't comment on the dual banna plugs.
Hope that helps and is clear, Jag
