I am in the process of updating my HT audio. Let me start with what I have: Onkyo NR616, Polk CS20 center, TSi400 front and surround, polk TSi200 rear surround PSW11 sub , and an old Polk sub from a speaker system that was sold as a set (for now until I get something better).
The TSi400's are what's new to me. They were a recent gift from my awesome wife![]()
Let me say that I am definitely an amatuer in audio equipment, but I am trying to learn as I go. Please feel free to correct me when I have an incorrect assumption or get a concept wrong, but please don't be a jerk.
With the TSi 400's having 4 terminals it is my understanding that they can be bi-amped and I have several questions about this:
1. If I keep the current 7.2 setup that I have I would be unable to bi-amp because bi-amping would require extra equipment - is that true? Is there an external amp that can be used to bi-amp the 400's?
2. There is a metal piece that appears to be connecting the top terminal to the bottom termial - What is this?
3. Since I am not bi-amping I have my speaker cable wired into the top terminal on each of the 400's - Does it matter which terminal (top vs. bottom) I'm wired into if I am not bi-amping?
4. I have played with the 400's and found that 60hz sounds the best to me, though if I turn off the subs and listen to the system without the subs it sounds very lacking in regards to bass and I feel like maybe I don't have the 400's set correctly or else they would be producing more low range sound. Any suggestions?
I greatly appreciate input as I am trying to figure out how to get the most out of my setup, especially since my wife spent so much money on me and I really don't know what I'm doing![]()

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