It would help if you gave a bit more detail on the ohm-loads of the amp and subs –
(You can check it on the back of the equipment or in the documentation, otherwise you can use the model numbers to look it up on the internet)
Given the RMS ratings of the 10inch sub, I assume you are talking about the W2511 which is a 4ohm single voice coil.
I am not sure which amplifier you are talking about, cuz I don’t know of many 2 channel kenwood amps pushing 350W rms.
But you should check whether the amp is producing 350W rms per channel (I highly doubt it) or whether it pushes 350W in bridged mode (over two channels combined). Also check at which ohm-load it is producing this power. This will help in determining how you should wire the speakers to get maximum potential.
Given the limited info, I think the amp will not be enough to run both of the subs at full potential.
If you wanna stick with a kenwood amp and are not too worried about the budget, I suggest you get the 9104D, which is a monoblock pushing 900W RMS @ 2ohm. Then you can wire the two subs in parallel to get a 20hm load and the load will be split into 450W per sub.
Hope this helps, but I will gladly answer more once you have more information.
